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description Publicationkeyboard_double_arrow_right Article , Journal , Other literature type 2019 FrancePublisher:MDPI AG Authors: Deng, Yimin; Ansart, Renaud; Baeyens, Jan; Huili, Zhang;doi: 10.3390/en12203908
Sulphur dioxide (SO2) is mostly emitted from coal-fueled power plants, from waste incineration, from sulphuric acid manufacturing, from clay brick plants and from treating nonferrous metals. The emission of SO2 needs to be abated. Both wet scrubbing (absorption) and dry or semi-dry (reaction) systems are used. In the dry process, both bubbling and circulating fluidized beds (BFB, CFB) can be used as contactor. Experimental results demonstrate a SO2-removal efficiency in excess of 94% in a CFB application. A general model of the heterogeneous reaction is proposed, combining the external diffusion of SO2 across the gas film, the internal diffusion of SO2 in the porous particles and the reaction as such (irreversible, 1st order). For the reaction of SO2 with a fine particulate reactant, the reaction rate constant and the relevant contact time are the dominant parameters. Application of the model equations reveals that the circulating fluidized bed is the most appropriate technique, where the high solid to gas ratio guarantees a high conversion in a short reaction time. For the CFB operation, the required gas contact time in a CFB at given superficial gas velocities and solids circulation rates will determine the SO2 removal rate.
Energies arrow_drop_down EnergiesOther literature type . 2019License: CC BYFull-Text: http://www.mdpi.com/1996-1073/12/20/3908/pdfData sources: Multidisciplinary Digital Publishing InstituteOpen Archive Toulouse Archive OuverteArticle . 2019 . Peer-reviewedData sources: Open Archive Toulouse Archive OuverteInstitut National Polytechnique de Toulouse (Theses)Article . 2019 . Peer-reviewedData sources: Institut National Polytechnique de Toulouse (Theses)OATAO (Open Archive Toulouse Archive Ouverte - Université de Toulouse)Article . 2019Data sources: Bielefeld Academic Search Engine (BASE)add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.3390/en12203908&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen gold 39 citations 39 popularity Top 10% influence Top 10% impulse Top 10% Powered by BIP!
visibility 16visibility views 16 download downloads 13 Powered bymore_vert Energies arrow_drop_down EnergiesOther literature type . 2019License: CC BYFull-Text: http://www.mdpi.com/1996-1073/12/20/3908/pdfData sources: Multidisciplinary Digital Publishing InstituteOpen Archive Toulouse Archive OuverteArticle . 2019 . Peer-reviewedData sources: Open Archive Toulouse Archive OuverteInstitut National Polytechnique de Toulouse (Theses)Article . 2019 . Peer-reviewedData sources: Institut National Polytechnique de Toulouse (Theses)OATAO (Open Archive Toulouse Archive Ouverte - Université de Toulouse)Article . 2019Data sources: Bielefeld Academic Search Engine (BASE)add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Other literature type , Conference object 2020 FrancePublisher:IOP Publishing Funded by:EC | NEXT-CSPEC| NEXT-CSPBaeyens, Jan; Li, Shuo; Zhang, Huili; Dewil, Raf; Flamant, Gilles; Ansart, Renaud; Deng, Yimin;Abstract Electricity from concentrated solar power (CSP) plants, gains an increasing interest and importance. To fully match the supply-demand principle, CSP processes include a thermal energy storage and back-up fuel supply. Novel CSP concepts are needed with specific targets of increased efficiency and reliability, and of reduced CAPEX and OPEX. The use of particle suspensions offers significant advantages since applicable in all sub-sections of the complete CSP as heat carrier from the receiver, to the heat storage, and ultimately to the power block. The use of particles in the steam generation (power block) is a common fluidized bed boiler technology. This paper will present the entire particle-based concept, while also discussing the potential to use biomass-based energy carriers as back-up heat supply. Process data and expected effects on the process economy of the system will be discussed.
Open Archive Toulous... arrow_drop_down Open Archive Toulouse Archive OuverteConference object . 2020 . Peer-reviewedData sources: Open Archive Toulouse Archive OuverteInstitut National Polytechnique de Toulouse (Theses)Conference object . 2020 . Peer-reviewedData sources: Institut National Polytechnique de Toulouse (Theses)IOP Conference Series Earth and Environmental ScienceArticle . 2020 . Peer-reviewedLicense: CC BYData sources: CrossrefMémoires en Sciences de l'Information et de la CommunicationConference object . 2020add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1088/1755-1315/544/1/012012&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen gold 2 citations 2 popularity Top 10% influence Average impulse Average Powered by BIP!
visibility 15visibility views 15 download downloads 24 Powered bymore_vert Open Archive Toulous... arrow_drop_down Open Archive Toulouse Archive OuverteConference object . 2020 . Peer-reviewedData sources: Open Archive Toulouse Archive OuverteInstitut National Polytechnique de Toulouse (Theses)Conference object . 2020 . Peer-reviewedData sources: Institut National Polytechnique de Toulouse (Theses)IOP Conference Series Earth and Environmental ScienceArticle . 2020 . Peer-reviewedLicense: CC BYData sources: CrossrefMémoires en Sciences de l'Information et de la CommunicationConference object . 2020add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1088/1755-1315/544/1/012012&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal 2018 FrancePublisher:Wiley Funded by:EC | CSP2EC| CSP2Hadrien Benoit; Renaud Ansart; Hervé Neau; Pablo Garcia Triñanes; Gilles Flamant; Olivier Simonin;doi: 10.1002/aic.16218
Solid particles can be used as a heat transfer medium in concentrated solar power plants to operate at higher temperature and achieve higher heat conversion efficiency than using the current solar heat transfer fluids that only work below 600°C. Among various particle circulation concepts, the dense particle suspension (DPS) flow in tubes, also called upflow bubbling fluidized bed (UBFB), was studied in the frame of the CSP2 FP7 European project. The DPS capacity to extract heat from a tube absorber exposed to concentrated solar radiation was demonstrated and the first values of the tube wall‐to‐DPS heat transfer coefficient were measured. A stable outlet temperature of 750°C was reached with a metallic tube, and a particle reflux in the near tube wall region was evidenced. In this article, the UBFB behavior is studied using the multiphase flow code NEPTUNE_CFD. Hydrodynamics of SiC Geldart A‐type particles and heat transfer imposed by a thermal flux at the wall are coupled in two‐dimensional unsteady numerical simulations. The convective/diffusive heat transfer between the gas and dispersed phase, and the inter‐particle radiative transfer (Rosseland approximation) are accounted for. Simulations and experiments are compared here and the temperature influence on the DPS flow is analyzed. © 2018 American Institute of Chemical Engineers AIChE J, 64: 3857–3867, 2018
Open Archive Toulous... arrow_drop_down Open Archive Toulouse Archive OuverteArticle . 2018 . Peer-reviewedData sources: Open Archive Toulouse Archive OuverteOpen Archive Toulouse Archive OuverteArticle . 2018 . Peer-reviewedData sources: Open Archive Toulouse Archive OuverteInstitut National Polytechnique de Toulouse (Theses)Article . 2018 . Peer-reviewedData sources: Institut National Polytechnique de Toulouse (Theses)OATAO (Open Archive Toulouse Archive Ouverte - Université de Toulouse)Article . 2018Data sources: Bielefeld Academic Search Engine (BASE)AIChE JournalArticle . 2018 . Peer-reviewedLicense: Wiley Online Library User AgreementData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1002/aic.16218&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen bronze 23 citations 23 popularity Top 10% influence Top 10% impulse Top 10% Powered by BIP!
visibility 13visibility views 13 download downloads 17 Powered bymore_vert Open Archive Toulous... arrow_drop_down Open Archive Toulouse Archive OuverteArticle . 2018 . Peer-reviewedData sources: Open Archive Toulouse Archive OuverteOpen Archive Toulouse Archive OuverteArticle . 2018 . Peer-reviewedData sources: Open Archive Toulouse Archive OuverteInstitut National Polytechnique de Toulouse (Theses)Article . 2018 . Peer-reviewedData sources: Institut National Polytechnique de Toulouse (Theses)OATAO (Open Archive Toulouse Archive Ouverte - Université de Toulouse)Article . 2018Data sources: Bielefeld Academic Search Engine (BASE)AIChE JournalArticle . 2018 . Peer-reviewedLicense: Wiley Online Library User AgreementData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1002/aic.16218&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal 2020 FrancePublisher:Elsevier BV Jan Baeyens; Huili Zhang; Jiapei Nie; Lise Appels; Raf Dewil; Renaud Ansart; Yimin Deng;Abstract Hydrogen is a common reactant in the petro-chemical industry and moreover recognized as a potential fuel within the next 20 years. The production of hydrogen from biomass and carbohydrate feedstock, though undoubtedly desirable and favored, is still at the level of laboratory or pilot scale. The present work reviews the current researched pathways. Different types of carbohydrates, and waste biomass are identified as feedstock for the fermentative bio-hydrogen production. Although all techniques suffer from drawbacks of a low H2 yield and the production of a liquid waste stream rich in VFAs that needs further treatment, the technical advances foster the commercial utilization. Bacterial strains capable of high hydrogen yield are assessed, together with advanced techniques of co-culture fermentation and metabolic engineering. Residual VFAs can be converted. The review provides an insight on how fermentation can be conducted for a wide spectrum of feedstock and how fermentation effluent can be valorized by integrating fermentation with other systems, leading to an improved industrial potential of the technique. To boost the fermentation potential, additional research should firstly target its demonstration on pilot or industrial scale to prove the process efficiency, production costs and method reliability. It should secondly focus on optimizing the micro-organism functionality, and should finally develop and demonstrate a viable valorization of the residual VFA-rich waste streams.
Open Archive Toulous... arrow_drop_down Open Archive Toulouse Archive OuverteArticle . 2020 . Peer-reviewedData sources: Open Archive Toulouse Archive OuverteInstitut National Polytechnique de Toulouse (Theses)Article . 2020 . Peer-reviewedData sources: Institut National Polytechnique de Toulouse (Theses)OATAO (Open Archive Toulouse Archive Ouverte - Université de Toulouse)Article . 2020Data sources: Bielefeld Academic Search Engine (BASE)Renewable and Sustainable Energy ReviewsArticle . 2020 . Peer-reviewedLicense: Elsevier TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.rser.2020.110023&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen bronze 230 citations 230 popularity Top 0.1% influence Top 10% impulse Top 0.1% Powered by BIP!
visibility 33visibility views 33 download downloads 56 Powered bymore_vert Open Archive Toulous... arrow_drop_down Open Archive Toulouse Archive OuverteArticle . 2020 . Peer-reviewedData sources: Open Archive Toulouse Archive OuverteInstitut National Polytechnique de Toulouse (Theses)Article . 2020 . Peer-reviewedData sources: Institut National Polytechnique de Toulouse (Theses)OATAO (Open Archive Toulouse Archive Ouverte - Université de Toulouse)Article . 2020Data sources: Bielefeld Academic Search Engine (BASE)Renewable and Sustainable Energy ReviewsArticle . 2020 . Peer-reviewedLicense: Elsevier TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.rser.2020.110023&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal , Preprint 2015 Canada, France, France, FrancePublisher:Elsevier BV Funded by:NSERCNSERCFarzam Fotovat; Renaud Ansart; Renaud Ansart; Jamal Chaouki; Mehrdji Hemati; Mehrdji Hemati; Olivier Simonin; Olivier Simonin;In this study, bubbling fluidization of a sand fluidized bed with different biomass loadings are investigated by means of the experiments and numerical simulation. The radioactive particle tracking (RPT) technique is employed to explore the impact of the particle shape factor on the biomass distribution and velocity profiles when it is fluidized in a 152 mm diameter bed with a 228 mm static height. Using a pair of fiber optic sensors, the bubbling characteristics of these mixtures at the upper half of the dense bed are determined at superficial gas velocities ranging from U=0.2 m/s to U=1.0 m/s. The experimental results show that despite cycling with a similar frequency, spherical biomass particles rise faster and sink slower than the cylindrical biomass particles. Furthermore, bubbles are more prone to break in the presence of biomass particles with lower sphericity. In the separate series of experiments, the reliability of the “frozen bed” technique to quantify the axial distribution of biomass particles is assessed by the RPT results. Using NEPTUNE_CFD software, three-dimensional numerical simulations are carried out via an Eulerian n-fluid approach. Validation of the simulation results with the experiments demonstrates that, in general, simulation satisfactorily reproduces the key fluidization and mixing features of biomass particles such as the global and local time-average distribution and velocity profiles.
Open Archive Toulous... arrow_drop_down Open Archive Toulouse Archive OuverteArticle . 2015 . Peer-reviewedData sources: Open Archive Toulouse Archive OuverteInstitut National Polytechnique de Toulouse (Theses)Article . 2015 . Peer-reviewedData sources: Institut National Polytechnique de Toulouse (Theses)OATAO (Open Archive Toulouse Archive Ouverte - Université de Toulouse)Article . 2015Data sources: Bielefeld Academic Search Engine (BASE)INRIA a CCSD electronic archive serverPreprint . 2015Data sources: INRIA a CCSD electronic archive serverMémoires en Sciences de l'Information et de la CommunicationPreprint . 2015Chemical Engineering ScienceArticle . 2015 . Peer-reviewedLicense: Elsevier TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.ces.2014.12.022&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen bronze 73 citations 73 popularity Top 10% influence Top 10% impulse Top 10% Powered by BIP!
visibility 14visibility views 14 download downloads 15 Powered bymore_vert Open Archive Toulous... arrow_drop_down Open Archive Toulouse Archive OuverteArticle . 2015 . Peer-reviewedData sources: Open Archive Toulouse Archive OuverteInstitut National Polytechnique de Toulouse (Theses)Article . 2015 . Peer-reviewedData sources: Institut National Polytechnique de Toulouse (Theses)OATAO (Open Archive Toulouse Archive Ouverte - Université de Toulouse)Article . 2015Data sources: Bielefeld Academic Search Engine (BASE)INRIA a CCSD electronic archive serverPreprint . 2015Data sources: INRIA a CCSD electronic archive serverMémoires en Sciences de l'Information et de la CommunicationPreprint . 2015Chemical Engineering ScienceArticle . 2015 . Peer-reviewedLicense: Elsevier TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.ces.2014.12.022&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal 2018 United Kingdom, France, France, FrancePublisher:Elsevier BV Funded by:EC | CSP2EC| CSP2García-Triñanes, P.; Seville, J.P.K.; Ansart, R.; Benoit, H.; T.W., Leadbeater; D.J., Parker;Concentrated solar power (CSP) plants conventionally make use of molten salt as the heat transfer medium, which transfers heat between the solar receiver and a steam turbine power circuit. A new approach uses particles of a heat-resistant particulate medium in the form of many dense upward-moving fluidised beds contained within an array of vertical tubes within the solar receiver. In most dense gas-solid fluidisation systems, particle circulation is induced by bubble motion and is the primary cause of particle convective heat transfer, which is the major contributing mechanism to overall heat transfer. The current work describes experiments designed to investigate the relationship between this solids convection and the heat transfer coefficient between the bed and the tube wall, which is shown to depend on the local particle concentration and their rate of renewal at the wall. Experiments were performed using 65 µm silicon carbide particles in a tube of diameter 30mm, replicating the conditions used in the real application. Solids motion and time-averaged solids concentration were measured using Positron Emission Particle Tracking (PEPT) and local heat transfer coefficients measured using small probes which employ electrical resistance heating and thermocouple temperature measurement. Results show that, as for other types of bubbling beds, the heat transfer coefficient first increases as the gas flow rate increases (because the rate of particle renewal at the wall increases), before passing through a maximum and decreasing again as the reducing local solids concentration at the wall becomes the dominant effect. Measured heat transfer coefficients are compared with theoretical approaches by Mickley and Fairbanks packet model and Thring correlation. The close correspondence between heat transfer coefficient and solids movement is here demonstrated by PEPT for the first time in a dense upward-moving fluidised bed.
Open Archive Toulous... arrow_drop_down Open Archive Toulouse Archive OuverteArticle . 2018 . Peer-reviewedData sources: Open Archive Toulouse Archive OuverteInstitut National Polytechnique de Toulouse (Theses)Article . 2018 . Peer-reviewedData sources: Institut National Polytechnique de Toulouse (Theses)INRIA a CCSD electronic archive serverArticle . 2017Data sources: INRIA a CCSD electronic archive serverChemical Engineering ScienceArticle . 2018 . Peer-reviewedLicense: Elsevier TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.ces.2017.11.041&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen bronze 20 citations 20 popularity Top 10% influence Average impulse Top 10% Powered by BIP!
visibility 13visibility views 13 download downloads 22 Powered bymore_vert Open Archive Toulous... arrow_drop_down Open Archive Toulouse Archive OuverteArticle . 2018 . Peer-reviewedData sources: Open Archive Toulouse Archive OuverteInstitut National Polytechnique de Toulouse (Theses)Article . 2018 . Peer-reviewedData sources: Institut National Polytechnique de Toulouse (Theses)INRIA a CCSD electronic archive serverArticle . 2017Data sources: INRIA a CCSD electronic archive serverChemical Engineering ScienceArticle . 2018 . Peer-reviewedLicense: Elsevier TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.ces.2017.11.041&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article 2024 FrancePublisher:MDPI AG Funded by:ANR | IPAFANR| IPAFCarlos Montilla; Renaud Ansart; Anass Majji; Ranem Nadir; Emmanuel Cid; David Simoncini; Stephane Negny;doi: 10.3390/pr12020386
Electrical capacitance volume tomography (ECVT) is an experimental technique capable of reconstructing 3D solid volume fraction distribution inside a sensing region. This technique has been used in fluidized beds as it allows for accessing data that are very difficult to obtain using other experimental devices. Recently, artificial neural networks have been proposed as a new type of reconstruction algorithm for ECVT devices. One of the main drawbacks of neural networks is that they need a database containing previously reconstructed images to learn from. Previous works have used databases with very simple or limited configurations that might not be well adapted to the complex dynamics of fluidized bed configurations. In this work, we study two different approaches: a supervised learning approach that uses simulated data as a training database and a reinforcement learning approach that relies only on experimental data. Our results show that both techniques can perform as well as the classical algorithms. However, once the neural networks are trained, the reconstruction process is much faster than the classical algorithms.
Processes arrow_drop_down Université Toulouse 2 - Jean Jaurès: HALArticle . 2024Data sources: Bielefeld Academic Search Engine (BASE)add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.3390/pr12020386&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen gold 0 citations 0 popularity Average influence Average impulse Average Powered by BIP!
more_vert Processes arrow_drop_down Université Toulouse 2 - Jean Jaurès: HALArticle . 2024Data sources: Bielefeld Academic Search Engine (BASE)add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.3390/pr12020386&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal 2008 FrancePublisher:Springer Science and Business Media LLC Authors: De Ryck, Alain; Ansart, Renaud; Dodds, John A.;A strain-rate dependent rheology for granular materials with a constant cohesion, is proposed and applied in the case of a flow down an inclined channel. The results obtained show that a plug flow zone appears below the free surface and show that low cohesion may affect drastically the flow behaviour when the inclination of the channel is close to the repose angle. These results give also a basic understanding of hstop, the depth of the remaining granular layer on an inclined channel, treating dilatancy like a cohesion-like behaviour.
Open Archive Toulous... arrow_drop_down Open Archive Toulouse Archive OuverteArticle . 2008 . Peer-reviewedData sources: Open Archive Toulouse Archive OuverteINRIA a CCSD electronic archive serverArticle . 2008Data sources: INRIA a CCSD electronic archive serverInstitut National Polytechnique de Toulouse (Theses)Article . 2008 . Peer-reviewedData sources: Institut National Polytechnique de Toulouse (Theses)INRIA a CCSD electronic archive serverArticle . 2008 . Peer-reviewedData sources: INRIA a CCSD electronic archive serverINRIA a CCSD electronic archive serverArticle . 2008Data sources: INRIA a CCSD electronic archive serveradd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1007/s10035-008-0106-2&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen bronze 10 citations 10 popularity Average influence Average impulse Average Powered by BIP!
visibility 7visibility views 7 download downloads 25 Powered bymore_vert Open Archive Toulous... arrow_drop_down Open Archive Toulouse Archive OuverteArticle . 2008 . Peer-reviewedData sources: Open Archive Toulouse Archive OuverteINRIA a CCSD electronic archive serverArticle . 2008Data sources: INRIA a CCSD electronic archive serverInstitut National Polytechnique de Toulouse (Theses)Article . 2008 . Peer-reviewedData sources: Institut National Polytechnique de Toulouse (Theses)INRIA a CCSD electronic archive serverArticle . 2008 . Peer-reviewedData sources: INRIA a CCSD electronic archive serverINRIA a CCSD electronic archive serverArticle . 2008Data sources: INRIA a CCSD electronic archive serveradd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal 2021 FrancePublisher:Elsevier BV Funded by:EC | NEXT-CSPEC| NEXT-CSPGilles Flamant; Gilles Flamant; Yimin Deng; Yimin Deng; Raf Dewil; Ronny Gueguen; Ronny Gueguen; Shuo Li; Renaud Ansart; Florian Sabatier; Jan Baeyens; Alex Le Gal; Alex Le Gal;Abstract A fluidized bed of Geldart-A particles is promoted as heat transfer fluid in the tubular solar receivers of solar towers. A pressure-driven upward particle flow affects the hydrodynamic flow structure and properties of the fluidized bed. Experiments involved a tube of 0.05 m internal diameter but of very high height/diameter ratio (>120), representative of the future solar receiver and of numerous chemical reactors. Solid circulation fluxes and aeration velocities were varied. Configurations of a bare tube and a tube with bubble rupture promoters were compared. In the bare tube, freely bubbling is transformed into axi-symmetric slugging at a bed level of ~1 m. With bubble rupture promoters, freely bubbling prevails to about a bed level of 3 m, and a turbulent fluidization mode develops higher up the tube (a more chaotic two-phase system with elongated and unstable “gas voids” and “dense solid clusters”), without axi-symmetric slugging detected. Experimental results for both tube configurations were assessed and compared with CFD predictions by the Euler n-fluid code, NEPTUNE_CFD. A good agreement of bed properties was obtained for slug/void frequencies and solids volume fraction in both tube configurations. BRPs moreover enhance the bubble through flow of the fluidizing gas, thus limiting the visible bubble flow rate and bubble sizes while increasing the gas/particle contact, and hence important in designing multi-tube chemical reactors. Whereas slugging limits the heat transfer from the tube wall to the suspension at ~200 W/m2K, the presence of BRPs maintains a heat transfer coefficient in excess of 600 W/m2K.
Open Archive Toulous... arrow_drop_down Open Archive Toulouse Archive OuverteArticle . 2021 . Peer-reviewedData sources: Open Archive Toulouse Archive OuverteInstitut National Polytechnique de Toulouse (Theses)Article . 2021 . Peer-reviewedData sources: Institut National Polytechnique de Toulouse (Theses)OATAO (Open Archive Toulouse Archive Ouverte - Université de Toulouse)Article . 2021Data sources: Bielefeld Academic Search Engine (BASE)Chemical Engineering JournalArticle . 2021 . Peer-reviewedLicense: Elsevier TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.cej.2021.129376&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen bronze 39 citations 39 popularity Top 1% influence Top 10% impulse Top 1% Powered by BIP!
visibility 59visibility views 59 download downloads 161 Powered bymore_vert Open Archive Toulous... arrow_drop_down Open Archive Toulouse Archive OuverteArticle . 2021 . Peer-reviewedData sources: Open Archive Toulouse Archive OuverteInstitut National Polytechnique de Toulouse (Theses)Article . 2021 . Peer-reviewedData sources: Institut National Polytechnique de Toulouse (Theses)OATAO (Open Archive Toulouse Archive Ouverte - Université de Toulouse)Article . 2021Data sources: Bielefeld Academic Search Engine (BASE)Chemical Engineering JournalArticle . 2021 . Peer-reviewedLicense: Elsevier TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal 2020 FrancePublisher:Elsevier BV Funded by:EC | NEXT-CSPEC| NEXT-CSPSabatier, Florian; Ansart, Renaud; Zhang, Huili; Baeyens, Jan; Simonin, Olivier;Long tubes with small internal diameter find increasing applications in indirect concentrated solar receivers using an Upflow Bubbling Fluidized Bed of Geldart-A powders as heat carrier. Although successfully demonstrated for tubes of 0.5 to 1 m length, longer tubes are required to increase the solar energy capture efficiency and capacity. The fluidization phenomena differ with the tube length, and freely bubbling fluidization will be transformed into slugging, thus hampering the heat transfer. The behavior of Geldart-A powders in tall tubes of small I.D. has not been extensively studied. The research experimentally investigated the different fluidization modes in a 4 m long tube, and demonstrated the occurrence of freely bubbling at the bottom section of the bed, and slugging from a bed depth in excess of about 1.25 m. Slug characteristics (frequency, length, velocity) were measured and correlated. The results were used to validate 3D numerical simulations based on an Euler-Euler approach in the NEPTUNE_CFD code applied to a fine mesh of 15,000,000 cells. A positive match between experimental and simulation results concerning frequency and velocity of large bubble structures was obtained. The effect of mesh refinement on the slugging behavior prediction was discussed.
Open Archive Toulous... arrow_drop_down Open Archive Toulouse Archive OuverteArticle . 2020 . Peer-reviewedData sources: Open Archive Toulouse Archive OuverteInstitut National Polytechnique de Toulouse (Theses)Article . 2020 . Peer-reviewedData sources: Institut National Polytechnique de Toulouse (Theses)OATAO (Open Archive Toulouse Archive Ouverte - Université de Toulouse)Article . 2020Data sources: Bielefeld Academic Search Engine (BASE)Chemical Engineering JournalArticle . 2020 . Peer-reviewedLicense: Elsevier TDMData sources: CrossrefChemical Engineering JournalArticle . 2019 . Peer-reviewedData sources: European Union Open Data Portaladd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euAccess RoutesGreen bronze 18 citations 18 popularity Top 10% influence Average impulse Top 10% Powered by BIP!
visibility 27visibility views 27 download downloads 9 Powered bymore_vert Open Archive Toulous... arrow_drop_down Open Archive Toulouse Archive OuverteArticle . 2020 . Peer-reviewedData sources: Open Archive Toulouse Archive OuverteInstitut National Polytechnique de Toulouse (Theses)Article . 2020 . Peer-reviewedData sources: Institut National Polytechnique de Toulouse (Theses)OATAO (Open Archive Toulouse Archive Ouverte - Université de Toulouse)Article . 2020Data sources: Bielefeld Academic Search Engine (BASE)Chemical Engineering JournalArticle . 2020 . Peer-reviewedLicense: Elsevier TDMData sources: CrossrefChemical Engineering JournalArticle . 2019 . Peer-reviewedData sources: European Union Open Data Portaladd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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description Publicationkeyboard_double_arrow_right Article , Journal , Other literature type 2019 FrancePublisher:MDPI AG Authors: Deng, Yimin; Ansart, Renaud; Baeyens, Jan; Huili, Zhang;doi: 10.3390/en12203908
Sulphur dioxide (SO2) is mostly emitted from coal-fueled power plants, from waste incineration, from sulphuric acid manufacturing, from clay brick plants and from treating nonferrous metals. The emission of SO2 needs to be abated. Both wet scrubbing (absorption) and dry or semi-dry (reaction) systems are used. In the dry process, both bubbling and circulating fluidized beds (BFB, CFB) can be used as contactor. Experimental results demonstrate a SO2-removal efficiency in excess of 94% in a CFB application. A general model of the heterogeneous reaction is proposed, combining the external diffusion of SO2 across the gas film, the internal diffusion of SO2 in the porous particles and the reaction as such (irreversible, 1st order). For the reaction of SO2 with a fine particulate reactant, the reaction rate constant and the relevant contact time are the dominant parameters. Application of the model equations reveals that the circulating fluidized bed is the most appropriate technique, where the high solid to gas ratio guarantees a high conversion in a short reaction time. For the CFB operation, the required gas contact time in a CFB at given superficial gas velocities and solids circulation rates will determine the SO2 removal rate.
Energies arrow_drop_down EnergiesOther literature type . 2019License: CC BYFull-Text: http://www.mdpi.com/1996-1073/12/20/3908/pdfData sources: Multidisciplinary Digital Publishing InstituteOpen Archive Toulouse Archive OuverteArticle . 2019 . Peer-reviewedData sources: Open Archive Toulouse Archive OuverteInstitut National Polytechnique de Toulouse (Theses)Article . 2019 . Peer-reviewedData sources: Institut National Polytechnique de Toulouse (Theses)OATAO (Open Archive Toulouse Archive Ouverte - Université de Toulouse)Article . 2019Data sources: Bielefeld Academic Search Engine (BASE)add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.3390/en12203908&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen gold 39 citations 39 popularity Top 10% influence Top 10% impulse Top 10% Powered by BIP!
visibility 16visibility views 16 download downloads 13 Powered bymore_vert Energies arrow_drop_down EnergiesOther literature type . 2019License: CC BYFull-Text: http://www.mdpi.com/1996-1073/12/20/3908/pdfData sources: Multidisciplinary Digital Publishing InstituteOpen Archive Toulouse Archive OuverteArticle . 2019 . Peer-reviewedData sources: Open Archive Toulouse Archive OuverteInstitut National Polytechnique de Toulouse (Theses)Article . 2019 . Peer-reviewedData sources: Institut National Polytechnique de Toulouse (Theses)OATAO (Open Archive Toulouse Archive Ouverte - Université de Toulouse)Article . 2019Data sources: Bielefeld Academic Search Engine (BASE)add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.3390/en12203908&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Other literature type , Conference object 2020 FrancePublisher:IOP Publishing Funded by:EC | NEXT-CSPEC| NEXT-CSPBaeyens, Jan; Li, Shuo; Zhang, Huili; Dewil, Raf; Flamant, Gilles; Ansart, Renaud; Deng, Yimin;Abstract Electricity from concentrated solar power (CSP) plants, gains an increasing interest and importance. To fully match the supply-demand principle, CSP processes include a thermal energy storage and back-up fuel supply. Novel CSP concepts are needed with specific targets of increased efficiency and reliability, and of reduced CAPEX and OPEX. The use of particle suspensions offers significant advantages since applicable in all sub-sections of the complete CSP as heat carrier from the receiver, to the heat storage, and ultimately to the power block. The use of particles in the steam generation (power block) is a common fluidized bed boiler technology. This paper will present the entire particle-based concept, while also discussing the potential to use biomass-based energy carriers as back-up heat supply. Process data and expected effects on the process economy of the system will be discussed.
Open Archive Toulous... arrow_drop_down Open Archive Toulouse Archive OuverteConference object . 2020 . Peer-reviewedData sources: Open Archive Toulouse Archive OuverteInstitut National Polytechnique de Toulouse (Theses)Conference object . 2020 . Peer-reviewedData sources: Institut National Polytechnique de Toulouse (Theses)IOP Conference Series Earth and Environmental ScienceArticle . 2020 . Peer-reviewedLicense: CC BYData sources: CrossrefMémoires en Sciences de l'Information et de la CommunicationConference object . 2020add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1088/1755-1315/544/1/012012&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen gold 2 citations 2 popularity Top 10% influence Average impulse Average Powered by BIP!
visibility 15visibility views 15 download downloads 24 Powered bymore_vert Open Archive Toulous... arrow_drop_down Open Archive Toulouse Archive OuverteConference object . 2020 . Peer-reviewedData sources: Open Archive Toulouse Archive OuverteInstitut National Polytechnique de Toulouse (Theses)Conference object . 2020 . Peer-reviewedData sources: Institut National Polytechnique de Toulouse (Theses)IOP Conference Series Earth and Environmental ScienceArticle . 2020 . Peer-reviewedLicense: CC BYData sources: CrossrefMémoires en Sciences de l'Information et de la CommunicationConference object . 2020add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1088/1755-1315/544/1/012012&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal 2018 FrancePublisher:Wiley Funded by:EC | CSP2EC| CSP2Hadrien Benoit; Renaud Ansart; Hervé Neau; Pablo Garcia Triñanes; Gilles Flamant; Olivier Simonin;doi: 10.1002/aic.16218
Solid particles can be used as a heat transfer medium in concentrated solar power plants to operate at higher temperature and achieve higher heat conversion efficiency than using the current solar heat transfer fluids that only work below 600°C. Among various particle circulation concepts, the dense particle suspension (DPS) flow in tubes, also called upflow bubbling fluidized bed (UBFB), was studied in the frame of the CSP2 FP7 European project. The DPS capacity to extract heat from a tube absorber exposed to concentrated solar radiation was demonstrated and the first values of the tube wall‐to‐DPS heat transfer coefficient were measured. A stable outlet temperature of 750°C was reached with a metallic tube, and a particle reflux in the near tube wall region was evidenced. In this article, the UBFB behavior is studied using the multiphase flow code NEPTUNE_CFD. Hydrodynamics of SiC Geldart A‐type particles and heat transfer imposed by a thermal flux at the wall are coupled in two‐dimensional unsteady numerical simulations. The convective/diffusive heat transfer between the gas and dispersed phase, and the inter‐particle radiative transfer (Rosseland approximation) are accounted for. Simulations and experiments are compared here and the temperature influence on the DPS flow is analyzed. © 2018 American Institute of Chemical Engineers AIChE J, 64: 3857–3867, 2018
Open Archive Toulous... arrow_drop_down Open Archive Toulouse Archive OuverteArticle . 2018 . Peer-reviewedData sources: Open Archive Toulouse Archive OuverteOpen Archive Toulouse Archive OuverteArticle . 2018 . Peer-reviewedData sources: Open Archive Toulouse Archive OuverteInstitut National Polytechnique de Toulouse (Theses)Article . 2018 . Peer-reviewedData sources: Institut National Polytechnique de Toulouse (Theses)OATAO (Open Archive Toulouse Archive Ouverte - Université de Toulouse)Article . 2018Data sources: Bielefeld Academic Search Engine (BASE)AIChE JournalArticle . 2018 . Peer-reviewedLicense: Wiley Online Library User AgreementData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1002/aic.16218&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen bronze 23 citations 23 popularity Top 10% influence Top 10% impulse Top 10% Powered by BIP!
visibility 13visibility views 13 download downloads 17 Powered bymore_vert Open Archive Toulous... arrow_drop_down Open Archive Toulouse Archive OuverteArticle . 2018 . Peer-reviewedData sources: Open Archive Toulouse Archive OuverteOpen Archive Toulouse Archive OuverteArticle . 2018 . Peer-reviewedData sources: Open Archive Toulouse Archive OuverteInstitut National Polytechnique de Toulouse (Theses)Article . 2018 . Peer-reviewedData sources: Institut National Polytechnique de Toulouse (Theses)OATAO (Open Archive Toulouse Archive Ouverte - Université de Toulouse)Article . 2018Data sources: Bielefeld Academic Search Engine (BASE)AIChE JournalArticle . 2018 . Peer-reviewedLicense: Wiley Online Library User AgreementData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1002/aic.16218&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal 2020 FrancePublisher:Elsevier BV Jan Baeyens; Huili Zhang; Jiapei Nie; Lise Appels; Raf Dewil; Renaud Ansart; Yimin Deng;Abstract Hydrogen is a common reactant in the petro-chemical industry and moreover recognized as a potential fuel within the next 20 years. The production of hydrogen from biomass and carbohydrate feedstock, though undoubtedly desirable and favored, is still at the level of laboratory or pilot scale. The present work reviews the current researched pathways. Different types of carbohydrates, and waste biomass are identified as feedstock for the fermentative bio-hydrogen production. Although all techniques suffer from drawbacks of a low H2 yield and the production of a liquid waste stream rich in VFAs that needs further treatment, the technical advances foster the commercial utilization. Bacterial strains capable of high hydrogen yield are assessed, together with advanced techniques of co-culture fermentation and metabolic engineering. Residual VFAs can be converted. The review provides an insight on how fermentation can be conducted for a wide spectrum of feedstock and how fermentation effluent can be valorized by integrating fermentation with other systems, leading to an improved industrial potential of the technique. To boost the fermentation potential, additional research should firstly target its demonstration on pilot or industrial scale to prove the process efficiency, production costs and method reliability. It should secondly focus on optimizing the micro-organism functionality, and should finally develop and demonstrate a viable valorization of the residual VFA-rich waste streams.
Open Archive Toulous... arrow_drop_down Open Archive Toulouse Archive OuverteArticle . 2020 . Peer-reviewedData sources: Open Archive Toulouse Archive OuverteInstitut National Polytechnique de Toulouse (Theses)Article . 2020 . Peer-reviewedData sources: Institut National Polytechnique de Toulouse (Theses)OATAO (Open Archive Toulouse Archive Ouverte - Université de Toulouse)Article . 2020Data sources: Bielefeld Academic Search Engine (BASE)Renewable and Sustainable Energy ReviewsArticle . 2020 . Peer-reviewedLicense: Elsevier TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.rser.2020.110023&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen bronze 230 citations 230 popularity Top 0.1% influence Top 10% impulse Top 0.1% Powered by BIP!
visibility 33visibility views 33 download downloads 56 Powered bymore_vert Open Archive Toulous... arrow_drop_down Open Archive Toulouse Archive OuverteArticle . 2020 . Peer-reviewedData sources: Open Archive Toulouse Archive OuverteInstitut National Polytechnique de Toulouse (Theses)Article . 2020 . Peer-reviewedData sources: Institut National Polytechnique de Toulouse (Theses)OATAO (Open Archive Toulouse Archive Ouverte - Université de Toulouse)Article . 2020Data sources: Bielefeld Academic Search Engine (BASE)Renewable and Sustainable Energy ReviewsArticle . 2020 . Peer-reviewedLicense: Elsevier TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.rser.2020.110023&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal , Preprint 2015 Canada, France, France, FrancePublisher:Elsevier BV Funded by:NSERCNSERCFarzam Fotovat; Renaud Ansart; Renaud Ansart; Jamal Chaouki; Mehrdji Hemati; Mehrdji Hemati; Olivier Simonin; Olivier Simonin;In this study, bubbling fluidization of a sand fluidized bed with different biomass loadings are investigated by means of the experiments and numerical simulation. The radioactive particle tracking (RPT) technique is employed to explore the impact of the particle shape factor on the biomass distribution and velocity profiles when it is fluidized in a 152 mm diameter bed with a 228 mm static height. Using a pair of fiber optic sensors, the bubbling characteristics of these mixtures at the upper half of the dense bed are determined at superficial gas velocities ranging from U=0.2 m/s to U=1.0 m/s. The experimental results show that despite cycling with a similar frequency, spherical biomass particles rise faster and sink slower than the cylindrical biomass particles. Furthermore, bubbles are more prone to break in the presence of biomass particles with lower sphericity. In the separate series of experiments, the reliability of the “frozen bed” technique to quantify the axial distribution of biomass particles is assessed by the RPT results. Using NEPTUNE_CFD software, three-dimensional numerical simulations are carried out via an Eulerian n-fluid approach. Validation of the simulation results with the experiments demonstrates that, in general, simulation satisfactorily reproduces the key fluidization and mixing features of biomass particles such as the global and local time-average distribution and velocity profiles.
Open Archive Toulous... arrow_drop_down Open Archive Toulouse Archive OuverteArticle . 2015 . Peer-reviewedData sources: Open Archive Toulouse Archive OuverteInstitut National Polytechnique de Toulouse (Theses)Article . 2015 . Peer-reviewedData sources: Institut National Polytechnique de Toulouse (Theses)OATAO (Open Archive Toulouse Archive Ouverte - Université de Toulouse)Article . 2015Data sources: Bielefeld Academic Search Engine (BASE)INRIA a CCSD electronic archive serverPreprint . 2015Data sources: INRIA a CCSD electronic archive serverMémoires en Sciences de l'Information et de la CommunicationPreprint . 2015Chemical Engineering ScienceArticle . 2015 . Peer-reviewedLicense: Elsevier TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.ces.2014.12.022&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen bronze 73 citations 73 popularity Top 10% influence Top 10% impulse Top 10% Powered by BIP!
visibility 14visibility views 14 download downloads 15 Powered bymore_vert Open Archive Toulous... arrow_drop_down Open Archive Toulouse Archive OuverteArticle . 2015 . Peer-reviewedData sources: Open Archive Toulouse Archive OuverteInstitut National Polytechnique de Toulouse (Theses)Article . 2015 . Peer-reviewedData sources: Institut National Polytechnique de Toulouse (Theses)OATAO (Open Archive Toulouse Archive Ouverte - Université de Toulouse)Article . 2015Data sources: Bielefeld Academic Search Engine (BASE)INRIA a CCSD electronic archive serverPreprint . 2015Data sources: INRIA a CCSD electronic archive serverMémoires en Sciences de l'Information et de la CommunicationPreprint . 2015Chemical Engineering ScienceArticle . 2015 . Peer-reviewedLicense: Elsevier TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.ces.2014.12.022&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal 2018 United Kingdom, France, France, FrancePublisher:Elsevier BV Funded by:EC | CSP2EC| CSP2García-Triñanes, P.; Seville, J.P.K.; Ansart, R.; Benoit, H.; T.W., Leadbeater; D.J., Parker;Concentrated solar power (CSP) plants conventionally make use of molten salt as the heat transfer medium, which transfers heat between the solar receiver and a steam turbine power circuit. A new approach uses particles of a heat-resistant particulate medium in the form of many dense upward-moving fluidised beds contained within an array of vertical tubes within the solar receiver. In most dense gas-solid fluidisation systems, particle circulation is induced by bubble motion and is the primary cause of particle convective heat transfer, which is the major contributing mechanism to overall heat transfer. The current work describes experiments designed to investigate the relationship between this solids convection and the heat transfer coefficient between the bed and the tube wall, which is shown to depend on the local particle concentration and their rate of renewal at the wall. Experiments were performed using 65 µm silicon carbide particles in a tube of diameter 30mm, replicating the conditions used in the real application. Solids motion and time-averaged solids concentration were measured using Positron Emission Particle Tracking (PEPT) and local heat transfer coefficients measured using small probes which employ electrical resistance heating and thermocouple temperature measurement. Results show that, as for other types of bubbling beds, the heat transfer coefficient first increases as the gas flow rate increases (because the rate of particle renewal at the wall increases), before passing through a maximum and decreasing again as the reducing local solids concentration at the wall becomes the dominant effect. Measured heat transfer coefficients are compared with theoretical approaches by Mickley and Fairbanks packet model and Thring correlation. The close correspondence between heat transfer coefficient and solids movement is here demonstrated by PEPT for the first time in a dense upward-moving fluidised bed.
Open Archive Toulous... arrow_drop_down Open Archive Toulouse Archive OuverteArticle . 2018 . Peer-reviewedData sources: Open Archive Toulouse Archive OuverteInstitut National Polytechnique de Toulouse (Theses)Article . 2018 . Peer-reviewedData sources: Institut National Polytechnique de Toulouse (Theses)INRIA a CCSD electronic archive serverArticle . 2017Data sources: INRIA a CCSD electronic archive serverChemical Engineering ScienceArticle . 2018 . Peer-reviewedLicense: Elsevier TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.ces.2017.11.041&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen bronze 20 citations 20 popularity Top 10% influence Average impulse Top 10% Powered by BIP!
visibility 13visibility views 13 download downloads 22 Powered bymore_vert Open Archive Toulous... arrow_drop_down Open Archive Toulouse Archive OuverteArticle . 2018 . Peer-reviewedData sources: Open Archive Toulouse Archive OuverteInstitut National Polytechnique de Toulouse (Theses)Article . 2018 . Peer-reviewedData sources: Institut National Polytechnique de Toulouse (Theses)INRIA a CCSD electronic archive serverArticle . 2017Data sources: INRIA a CCSD electronic archive serverChemical Engineering ScienceArticle . 2018 . Peer-reviewedLicense: Elsevier TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.ces.2017.11.041&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article 2024 FrancePublisher:MDPI AG Funded by:ANR | IPAFANR| IPAFCarlos Montilla; Renaud Ansart; Anass Majji; Ranem Nadir; Emmanuel Cid; David Simoncini; Stephane Negny;doi: 10.3390/pr12020386
Electrical capacitance volume tomography (ECVT) is an experimental technique capable of reconstructing 3D solid volume fraction distribution inside a sensing region. This technique has been used in fluidized beds as it allows for accessing data that are very difficult to obtain using other experimental devices. Recently, artificial neural networks have been proposed as a new type of reconstruction algorithm for ECVT devices. One of the main drawbacks of neural networks is that they need a database containing previously reconstructed images to learn from. Previous works have used databases with very simple or limited configurations that might not be well adapted to the complex dynamics of fluidized bed configurations. In this work, we study two different approaches: a supervised learning approach that uses simulated data as a training database and a reinforcement learning approach that relies only on experimental data. Our results show that both techniques can perform as well as the classical algorithms. However, once the neural networks are trained, the reconstruction process is much faster than the classical algorithms.
Processes arrow_drop_down Université Toulouse 2 - Jean Jaurès: HALArticle . 2024Data sources: Bielefeld Academic Search Engine (BASE)add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.3390/pr12020386&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen gold 0 citations 0 popularity Average influence Average impulse Average Powered by BIP!
more_vert Processes arrow_drop_down Université Toulouse 2 - Jean Jaurès: HALArticle . 2024Data sources: Bielefeld Academic Search Engine (BASE)add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.3390/pr12020386&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal 2008 FrancePublisher:Springer Science and Business Media LLC Authors: De Ryck, Alain; Ansart, Renaud; Dodds, John A.;A strain-rate dependent rheology for granular materials with a constant cohesion, is proposed and applied in the case of a flow down an inclined channel. The results obtained show that a plug flow zone appears below the free surface and show that low cohesion may affect drastically the flow behaviour when the inclination of the channel is close to the repose angle. These results give also a basic understanding of hstop, the depth of the remaining granular layer on an inclined channel, treating dilatancy like a cohesion-like behaviour.
Open Archive Toulous... arrow_drop_down Open Archive Toulouse Archive OuverteArticle . 2008 . Peer-reviewedData sources: Open Archive Toulouse Archive OuverteINRIA a CCSD electronic archive serverArticle . 2008Data sources: INRIA a CCSD electronic archive serverInstitut National Polytechnique de Toulouse (Theses)Article . 2008 . Peer-reviewedData sources: Institut National Polytechnique de Toulouse (Theses)INRIA a CCSD electronic archive serverArticle . 2008 . Peer-reviewedData sources: INRIA a CCSD electronic archive serverINRIA a CCSD electronic archive serverArticle . 2008Data sources: INRIA a CCSD electronic archive serveradd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1007/s10035-008-0106-2&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen bronze 10 citations 10 popularity Average influence Average impulse Average Powered by BIP!
visibility 7visibility views 7 download downloads 25 Powered bymore_vert Open Archive Toulous... arrow_drop_down Open Archive Toulouse Archive OuverteArticle . 2008 . Peer-reviewedData sources: Open Archive Toulouse Archive OuverteINRIA a CCSD electronic archive serverArticle . 2008Data sources: INRIA a CCSD electronic archive serverInstitut National Polytechnique de Toulouse (Theses)Article . 2008 . Peer-reviewedData sources: Institut National Polytechnique de Toulouse (Theses)INRIA a CCSD electronic archive serverArticle . 2008 . Peer-reviewedData sources: INRIA a CCSD electronic archive serverINRIA a CCSD electronic archive serverArticle . 2008Data sources: INRIA a CCSD electronic archive serveradd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1007/s10035-008-0106-2&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal 2021 FrancePublisher:Elsevier BV Funded by:EC | NEXT-CSPEC| NEXT-CSPGilles Flamant; Gilles Flamant; Yimin Deng; Yimin Deng; Raf Dewil; Ronny Gueguen; Ronny Gueguen; Shuo Li; Renaud Ansart; Florian Sabatier; Jan Baeyens; Alex Le Gal; Alex Le Gal;Abstract A fluidized bed of Geldart-A particles is promoted as heat transfer fluid in the tubular solar receivers of solar towers. A pressure-driven upward particle flow affects the hydrodynamic flow structure and properties of the fluidized bed. Experiments involved a tube of 0.05 m internal diameter but of very high height/diameter ratio (>120), representative of the future solar receiver and of numerous chemical reactors. Solid circulation fluxes and aeration velocities were varied. Configurations of a bare tube and a tube with bubble rupture promoters were compared. In the bare tube, freely bubbling is transformed into axi-symmetric slugging at a bed level of ~1 m. With bubble rupture promoters, freely bubbling prevails to about a bed level of 3 m, and a turbulent fluidization mode develops higher up the tube (a more chaotic two-phase system with elongated and unstable “gas voids” and “dense solid clusters”), without axi-symmetric slugging detected. Experimental results for both tube configurations were assessed and compared with CFD predictions by the Euler n-fluid code, NEPTUNE_CFD. A good agreement of bed properties was obtained for slug/void frequencies and solids volume fraction in both tube configurations. BRPs moreover enhance the bubble through flow of the fluidizing gas, thus limiting the visible bubble flow rate and bubble sizes while increasing the gas/particle contact, and hence important in designing multi-tube chemical reactors. Whereas slugging limits the heat transfer from the tube wall to the suspension at ~200 W/m2K, the presence of BRPs maintains a heat transfer coefficient in excess of 600 W/m2K.
Open Archive Toulous... arrow_drop_down Open Archive Toulouse Archive OuverteArticle . 2021 . Peer-reviewedData sources: Open Archive Toulouse Archive OuverteInstitut National Polytechnique de Toulouse (Theses)Article . 2021 . Peer-reviewedData sources: Institut National Polytechnique de Toulouse (Theses)OATAO (Open Archive Toulouse Archive Ouverte - Université de Toulouse)Article . 2021Data sources: Bielefeld Academic Search Engine (BASE)Chemical Engineering JournalArticle . 2021 . Peer-reviewedLicense: Elsevier TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.cej.2021.129376&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen bronze 39 citations 39 popularity Top 1% influence Top 10% impulse Top 1% Powered by BIP!
visibility 59visibility views 59 download downloads 161 Powered bymore_vert Open Archive Toulous... arrow_drop_down Open Archive Toulouse Archive OuverteArticle . 2021 . Peer-reviewedData sources: Open Archive Toulouse Archive OuverteInstitut National Polytechnique de Toulouse (Theses)Article . 2021 . Peer-reviewedData sources: Institut National Polytechnique de Toulouse (Theses)OATAO (Open Archive Toulouse Archive Ouverte - Université de Toulouse)Article . 2021Data sources: Bielefeld Academic Search Engine (BASE)Chemical Engineering JournalArticle . 2021 . Peer-reviewedLicense: Elsevier TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.cej.2021.129376&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal 2020 FrancePublisher:Elsevier BV Funded by:EC | NEXT-CSPEC| NEXT-CSPSabatier, Florian; Ansart, Renaud; Zhang, Huili; Baeyens, Jan; Simonin, Olivier;Long tubes with small internal diameter find increasing applications in indirect concentrated solar receivers using an Upflow Bubbling Fluidized Bed of Geldart-A powders as heat carrier. Although successfully demonstrated for tubes of 0.5 to 1 m length, longer tubes are required to increase the solar energy capture efficiency and capacity. The fluidization phenomena differ with the tube length, and freely bubbling fluidization will be transformed into slugging, thus hampering the heat transfer. The behavior of Geldart-A powders in tall tubes of small I.D. has not been extensively studied. The research experimentally investigated the different fluidization modes in a 4 m long tube, and demonstrated the occurrence of freely bubbling at the bottom section of the bed, and slugging from a bed depth in excess of about 1.25 m. Slug characteristics (frequency, length, velocity) were measured and correlated. The results were used to validate 3D numerical simulations based on an Euler-Euler approach in the NEPTUNE_CFD code applied to a fine mesh of 15,000,000 cells. A positive match between experimental and simulation results concerning frequency and velocity of large bubble structures was obtained. The effect of mesh refinement on the slugging behavior prediction was discussed.
Open Archive Toulous... arrow_drop_down Open Archive Toulouse Archive OuverteArticle . 2020 . Peer-reviewedData sources: Open Archive Toulouse Archive OuverteInstitut National Polytechnique de Toulouse (Theses)Article . 2020 . Peer-reviewedData sources: Institut National Polytechnique de Toulouse (Theses)OATAO (Open Archive Toulouse Archive Ouverte - Université de Toulouse)Article . 2020Data sources: Bielefeld Academic Search Engine (BASE)Chemical Engineering JournalArticle . 2020 . Peer-reviewedLicense: Elsevier TDMData sources: CrossrefChemical Engineering JournalArticle . 2019 . Peer-reviewedData sources: European Union Open Data Portaladd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.cej.2019.123568&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen bronze 18 citations 18 popularity Top 10% influence Average impulse Top 10% Powered by BIP!
visibility 27visibility views 27 download downloads 9 Powered bymore_vert Open Archive Toulous... arrow_drop_down Open Archive Toulouse Archive OuverteArticle . 2020 . Peer-reviewedData sources: Open Archive Toulouse Archive OuverteInstitut National Polytechnique de Toulouse (Theses)Article . 2020 . Peer-reviewedData sources: Institut National Polytechnique de Toulouse (Theses)OATAO (Open Archive Toulouse Archive Ouverte - Université de Toulouse)Article . 2020Data sources: Bielefeld Academic Search Engine (BASE)Chemical Engineering JournalArticle . 2020 . Peer-reviewedLicense: Elsevier TDMData sources: CrossrefChemical Engineering JournalArticle . 2019 . Peer-reviewedData sources: European Union Open Data Portaladd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/j.cej.2019.123568&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu