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description Publicationkeyboard_double_arrow_right Article , Journal 2020Publisher:Springer Science and Business Media LLC Authors:Martin Hammerschmid;
Martin Hammerschmid
Martin Hammerschmid in OpenAIREStefan Müller;
Stefan Müller
Stefan Müller in OpenAIREJosef Fuchs;
Josef Fuchs
Josef Fuchs in OpenAIREHermann Hofbauer;
Hermann Hofbauer
Hermann Hofbauer in OpenAIREAbstractThe present paper focuses on the production of a below zero emission reducing gas for use in raw iron production. The biomass-based concept of sorption-enhanced reforming combined with oxyfuel combustion constitutes an additional opportunity for selective separation of CO2. First experimental results from the test plant at TU Wien (100 kW) have been implemented. Based on these results, it could be demonstrated that the biomass-based product gas fulfills all requirements for the use in direct reduction plants and a concept for the commercial-scale use was developed. Additionally, the profitability of the below zero emission reducing gas concept within a techno-economic assessment is investigated. The results of the techno-economic assessment show that the production of biomass-based reducing gas can compete with the conventional natural gas route, if the required oxygen is delivered by an existing air separation unit and the utilization of the separated CO2 is possible. The production costs of the biomass-based reducing gas are in the range of natural gas-based reducing gas and twice as high as the production of fossil coke in a coke oven plant. The CO2 footprint of a direct reduction plant fed with biomass-based reducing gas is more than 80% lower compared with the conventional blast furnace route and could be even more if carbon capture and utilization is applied. Therefore, the biomass-based production of reducing gas could definitely make a reasonable contribution to a reduction of fossil CO2 emissions within the iron and steel sector in Austria.
Biomass Conversion a... arrow_drop_down Biomass Conversion and BiorefineryArticle . 2020 . Peer-reviewedLicense: CC BYData 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=10.1007/s13399-020-00939-z&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess Routeshybrid 21 citations 21 popularity Top 10% influence Top 10% impulse Top 10% Powered by BIP!
more_vert Biomass Conversion a... arrow_drop_down Biomass Conversion and BiorefineryArticle . 2020 . Peer-reviewedLicense: CC BYData 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=10.1007/s13399-020-00939-z&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal 2019Publisher:Elsevier BV Authors: Hermann Hofbauer;Josef Fuchs;
J.C. Schmid;Josef Fuchs
Josef Fuchs in OpenAIREStefan Müller;
Stefan Müller
Stefan Müller in OpenAIREAbstract The dual fluidized bed steam gasification process aims for the production of a nitrogen-free product gas via a steam blown gasification reactor and an air blown combustion reactor. Limestone as bed material enables the in-situ removal of carbon dioxide from the gasification reactor and therefore hydrogen contents in the product gas up to 75 vol.-%db can be gained (sorption enhanced reforming). Thereby, the limestone experiences cycles of carbonation (CaO + CO2 ->CaCO3) and calcination (CaCO3 ->CaO + CO2). Typically, kinetics are of great relevance for heterogeneous gas-solid reactions. Thus, the influence of both, kinetics of carbonation and calcination, on the SER process is investigated and a model of the SER process is established. The theoretical results are compared to those experimentally gathered and show good accordance for low to medium cycle rates of the bed material. The calcination reaction is identified as limiting step during the process due to insufficient residence time and an unfavorable temperature profile in the combustion reactor.
International Journa... arrow_drop_down International Journal of Greenhouse Gas ControlArticle . 2019 . 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.ijggc.2019.102787&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu15 citations 15 popularity Top 10% influence Average impulse Top 10% Powered by BIP!
more_vert International Journa... arrow_drop_down International Journal of Greenhouse Gas ControlArticle . 2019 . 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.ijggc.2019.102787&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal 2020Publisher:Springer Science and Business Media LLC Funded by:EC | Heat-To-FuelEC| Heat-To-FuelAuthors:Mauerhofer, A. M.;
Mauerhofer, A. M.
Mauerhofer, A. M. in OpenAIREMüller, S.;
Müller, S.
Müller, S. in OpenAIREBartik, A.;
Bartik, A.
Bartik, A. in OpenAIREBenedikt, F.;
+3 AuthorsBenedikt, F.
Benedikt, F. in OpenAIREMauerhofer, A. M.;
Mauerhofer, A. M.
Mauerhofer, A. M. in OpenAIREMüller, S.;
Müller, S.
Müller, S. in OpenAIREBartik, A.;
Bartik, A.
Bartik, A. in OpenAIREBenedikt, F.;
Benedikt, F.
Benedikt, F. in OpenAIREFuchs, J.;
Fuchs, J.
Fuchs, J. in OpenAIREHammerschmid, M.;
Hammerschmid, M.
Hammerschmid, M. in OpenAIREHofbauer, H.;
Hofbauer, H.
Hofbauer, H. in OpenAIREAbstractIn many industrial processes, the climate-damaging gas CO2is produced as undesired by-product. The dual fluidized bed biomass gasification technology offers the opportunity to tackle this problem by using the produced CO2within the process as gasification agent. Therefore, a 100 kWthpilot plant at TU Wien was used to investigate the use of CO2as gasification agent by converting softwood as fuel and olivine as bed material into high-valuable product gas. A parameter variation was conducted, where the typically used gasification agent steam was substituted stepwise by CO2. Thereby, the amount of CO and CO2increased and the content of H2decreased in the product gas. These trends resulted in a declining H2/CO ratio and a decreasing lower heating value when CO2was increased as gasification agent. In contrast to these declining trends, the carbon utilization efficiency showed an increasing course. As second part of this work, a temperature variation from 740 to 840 °C was conducted to investigate the change of the main product gas components. With increasing temperature, CO and H2increased and CO2decreased. To determine the degree of conversion of CO2in the DFB reactor system, two approaches were selected: (1) a carbon balance and (2) a hydrogen balance. This way, it was found out that a certain amount of CO2was indeed converted at the investigated process conditions. Furthermore, under certain assumptions, the reverse water-gas shift reaction was identified to be the predominant reaction during CO2gasification.
Biomass Conversion a... arrow_drop_down Biomass Conversion and BiorefineryArticle . 2020 . Peer-reviewedLicense: CC BYData sources: CrossrefBiomass Conversion and BiorefineryArticle . 2021 . 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=10.1007/s13399-020-00822-x&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen hybrid 17 citations 17 popularity Top 10% influence Average impulse Top 10% Powered by BIP!
visibility 3visibility views 3 download downloads 5 Powered bymore_vert Biomass Conversion a... arrow_drop_down Biomass Conversion and BiorefineryArticle . 2020 . Peer-reviewedLicense: CC BYData sources: CrossrefBiomass Conversion and BiorefineryArticle . 2021 . 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=10.1007/s13399-020-00822-x&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal 2019Publisher:Elsevier BV Funded by:EC | Heat-To-FuelEC| Heat-To-FuelAuthors:Anna Magdalena Mauerhofer;
Anna Magdalena Mauerhofer
Anna Magdalena Mauerhofer in OpenAIREJosef Fuchs;
Josef Fuchs
Josef Fuchs in OpenAIREStefan Müller;
Stefan Müller
Stefan Müller in OpenAIREFlorian Benedikt;
+2 AuthorsFlorian Benedikt
Florian Benedikt in OpenAIREAnna Magdalena Mauerhofer;
Anna Magdalena Mauerhofer
Anna Magdalena Mauerhofer in OpenAIREJosef Fuchs;
Josef Fuchs
Josef Fuchs in OpenAIREStefan Müller;
Stefan Müller
Stefan Müller in OpenAIREFlorian Benedikt;
Florian Benedikt
Florian Benedikt in OpenAIREJohannes Christian Schmid;
Johannes Christian Schmid
Johannes Christian Schmid in OpenAIREHermann Hofbauer;
Hermann Hofbauer
Hermann Hofbauer in OpenAIREAbstract The use of CO2 as gasification agent in the 100 kWth dual fluidized bed gasification pilot plant was investigated at TU Wien. For this purpose, steam was replaced stepwise by CO2 as gasification agent. Softwood was used as fuel and olivine as bed material. Starting from 100 vol.-% steam as gasification agent, substituting it by 32, 45 and finally 68 vol.-% CO2. All loop seals were fluidized further with steam, which resulted in these volume percentages. Additionally, a CO2 gasification test campaign converting softwood with a mixture (90/10 wt.-%) of olivine and limestone was investigated. For this case, the gasification agent was composed of 65 vol.-% CO2 and 35 vol.-% steam. The use of CO2 as gasification agent led to changes of the product gas. Instead of a H2-enriched product gas, which was produced during steam gasification, CO and CO2 occupied the major share of the product gas. Consequently, the H2/CO ratios as well as the lower heating values decreased when substituting steam by CO2. Tar contents were lower for CO2/steam gasification compared to pure steam gasification.
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=10.1016/j.fuel.2019.04.168&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen hybrid 50 citations 50 popularity Top 10% influence Top 10% impulse Top 1% Powered by BIP!
visibility 6visibility views 6 download downloads 14 Powered bymore_vert 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=10.1016/j.fuel.2019.04.168&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Presentation 2024Embargo end date: 23 Dec 2024Publisher:TU Wien Authors:Fleiß, Benjamin;
Fleiß, Benjamin
Fleiß, Benjamin in OpenAIREFuchs, Josef;
Fuchs, Josef
Fuchs, Josef in OpenAIREMüller, Stefan;
Hofbauer, Hermann;Müller, Stefan
Müller, Stefan in OpenAIREdoi: 10.34726/7960
Chemical looping combustion (CLC) of biogenic fuels offers significant potential for achieving negative CO2 emissions by capturing CO2 during energy production. However, ensuring high purity of captured CO2 for compression, transport, and storage applications poses challenges, particularly due to potential impurities in biomass such as ash, phosphorus (P), sulfur (S), nitrogen (N), and chlorine (Cl). The distribution of these impurities among transport to the air reactor, binding to cyclone ash, or conversion to the gas phase, as well as their impact on reaction pathways, remains largely uncertain, varying greatly depending on the reactor system, fuel used, and oxygen carrier employed. This study focused on establishing impurity balances during pilot plant operation (80 kWth) using a synthetic manganese-iron-copper oxygen carrier with bark as fuel. Through detailed analysis of gas components in the fuel reactor (FR) exhaust gas, as well as examination of bed material after the FR and the FR cyclone, nitrogen and sulfur mass balances were determined. Approximately 90 wt% of the fuel's nitrogen was converted to gaseous N2, with the remainder mainly transported with the bed material to the air reactor (AR). Concentrations of unwanted nitrogen compounds such as NH3, NO, and N2O were each below 1 wt% of the fuel's nitrogen. The SO2 concentration of the gas was low due to separation during gas analysis via water condensation and washing with rapeseeds methyl ester. A discussion of possible gas cleaning routes to meet storage requirements is based on the measured impurity levels.
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=10.34726/7960&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu0 citations 0 popularity Average influence Average impulse Average Powered by BIP!
more_vert 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=10.34726/7960&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal 2020Publisher:Springer Science and Business Media LLC Authors:Stefan Müller;
Lara Theiss;Stefan Müller
Stefan Müller in OpenAIREBenjamin Fleiß;
Benjamin Fleiß
Benjamin Fleiß in OpenAIREMartin Hammerschmid;
+5 AuthorsMartin Hammerschmid
Martin Hammerschmid in OpenAIREStefan Müller;
Lara Theiss;Stefan Müller
Stefan Müller in OpenAIREBenjamin Fleiß;
Benjamin Fleiß
Benjamin Fleiß in OpenAIREMartin Hammerschmid;
Martin Hammerschmid
Martin Hammerschmid in OpenAIREJosef Fuchs;
Stefan Penthor;Josef Fuchs
Josef Fuchs in OpenAIREDaniel C. Rosenfeld;
Daniel C. Rosenfeld
Daniel C. Rosenfeld in OpenAIREMarkus Lehner;
Markus Lehner
Markus Lehner in OpenAIREHermann Hofbauer;
Hermann Hofbauer
Hermann Hofbauer in OpenAIREAbstractThe present work describes the results achieved during a study aiming at the full replacement of the natural gas demand of an integrated hot metal production. This work implements a novel approach using a biomass gasification plant combined with an electrolysis unit to substitute the present natural gas demand of an integrated hot metal production. Therefore, a simulation platform, including mathematical models for all relevant process units, enabling the calculation of all relevant mass and energy balances was created. As a result, the calculations show that a natural gas demand of about 385 MW can be replaced and an additional 100 MW hydrogen-rich reducing gas can be produced by the use of 132 MW of biomass together with 571 MW electricity produced from renewable energy. The results achieved indicate that a full replacement of the natural gas demand would be possible from a technological point of view. At the same time, the technological readiness level of available electrolysis units shows that a production at such a large scale has not been demonstrated yet.
Biomass Conversion a... arrow_drop_down Biomass Conversion and BiorefineryArticle . 2020 . Peer-reviewedLicense: CC BYData 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=10.1007/s13399-020-01021-4&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess Routeshybrid 9 citations 9 popularity Top 10% influence Average impulse Top 10% Powered by BIP!
more_vert Biomass Conversion a... arrow_drop_down Biomass Conversion and BiorefineryArticle . 2020 . Peer-reviewedLicense: CC BYData 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=10.1007/s13399-020-01021-4&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal 2019Publisher:Springer Science and Business Media LLC Authors: Johannes Christian Schmid;Florian Benedikt;
Florian Benedikt
Florian Benedikt in OpenAIREJosef Fuchs;
Josef Fuchs
Josef Fuchs in OpenAIREAnna Magdalena Mauerhofer;
+2 AuthorsAnna Magdalena Mauerhofer
Anna Magdalena Mauerhofer in OpenAIREJohannes Christian Schmid;Florian Benedikt;
Florian Benedikt
Florian Benedikt in OpenAIREJosef Fuchs;
Josef Fuchs
Josef Fuchs in OpenAIREAnna Magdalena Mauerhofer;
Anna Magdalena Mauerhofer
Anna Magdalena Mauerhofer in OpenAIREStefan Müller;
Hermann Hofbauer;Stefan Müller
Stefan Müller in OpenAIREAbstractIn many processes proposed for biorefineries, recycling procedures, and industrial or agricultural production processes, residue is generated which could be further transformed by thermochemical conversion via gasification. The technology of dual fluidized bed steam gasification is capable of producing a valuable product gas out of such residue. The generated nitrogen-free product gas can be used for heat and power production and is suitable for separating gases (e.g. hydrogen). However, if the product gas is cleaned, its use as syngas is more beneficial for manufacturing renewable chemical substances, like synthetic natural gas, methanol, Fischer–Tropsch liquids, or mixed alcohols. This paper presents the results of experimental research from gasification test runs of different biogenic fuels, carried out with an advanced 100 kW pilot plant over the last 5 years at TU Wien. The focus is to provide an overview of measured results validated by mass and energy balances and to present key calculated performance indicating key figures of the test runs. In this way, the influence of various operational parameters and the composition of the product gas are evaluated. The presented results form the basis for the proper design of suitable gas-cleaning equipment. Subsequently, the clean syngas is available for several synthesis applications in future biorefineries.
Biomass Conversion a... arrow_drop_down Biomass Conversion and BiorefineryArticle . 2019 . Peer-reviewedLicense: CC BYData 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=10.1007/s13399-019-00486-2&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess Routeshybrid 58 citations 58 popularity Top 1% influence Top 10% impulse Top 10% Powered by BIP!
more_vert Biomass Conversion a... arrow_drop_down Biomass Conversion and BiorefineryArticle . 2019 . Peer-reviewedLicense: CC BYData 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=10.1007/s13399-019-00486-2&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal 2018Publisher:Elsevier BV Authors: Hermann Hofbauer;Florian Benedikt;
Florian Benedikt
Florian Benedikt in OpenAIREAnna Magdalena Mauerhofer;
Anna Magdalena Mauerhofer
Anna Magdalena Mauerhofer in OpenAIREStefan Müller;
+2 AuthorsStefan Müller
Stefan Müller in OpenAIREHermann Hofbauer;Florian Benedikt;
Florian Benedikt
Florian Benedikt in OpenAIREAnna Magdalena Mauerhofer;
Anna Magdalena Mauerhofer
Anna Magdalena Mauerhofer in OpenAIREStefan Müller;
J.C. Schmid;Stefan Müller
Stefan Müller in OpenAIREJosef Fuchs;
Josef Fuchs
Josef Fuchs in OpenAIREAbstract Within this paper, investigations to convert softwood with four different types of bed materials in the 100 kWth dual fluidized bed steam gasification pilot plant at TU Wien are presented and discussed. The results of ten different experiments were compared. Quartz, olivine and feldspar were mixed with limestone in mass ratios of 100/0, 90/10, 50/50 and 0/100. Limestone was used due to its catalytic activity at high temperatures as CaO and thus enhanced tar, char and water conversion of quartz, olivine and feldspar. The admixture of limestone to quartz, olivine and feldspar shifted the product gas compositions towards higher hydrogen and carbon dioxide and lower carbon monoxide contents. By using 100 wt.-% limestone as bed material a hydrogen content of 47.4 vol.-% could be generated. Additionally, the tar concentrations as well as the tar dew points decreased and especially the heavy tar compounds could be reduced. Already small amounts of limestone (
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=10.1016/j.energy.2018.05.158&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu62 citations 62 popularity Top 10% influence Top 10% impulse Top 1% Powered by BIP!
more_vert 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=10.1016/j.energy.2018.05.158&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal 2019Publisher:Elsevier BV Funded by:EC | Heat-To-FuelEC| Heat-To-FuelAuthors:Mauerhofer, A.M.;
Schmid, J.C.;Mauerhofer, A.M.
Mauerhofer, A.M. in OpenAIREBenedikt, F.;
Benedikt, F.
Benedikt, F. in OpenAIREFuchs, J.;
+2 AuthorsFuchs, J.
Fuchs, J. in OpenAIREMauerhofer, A.M.;
Schmid, J.C.;Mauerhofer, A.M.
Mauerhofer, A.M. in OpenAIREBenedikt, F.;
Benedikt, F.
Benedikt, F. in OpenAIREFuchs, J.;
Fuchs, J.
Fuchs, J. in OpenAIREMüller, S.;
Hofbauer, H.;Müller, S.
Müller, S. in OpenAIREAbstract The impact of the counter-current column of the gasification reactor of a 100 kWth dual fluidized bed steam gasification pilot plant on the product gas quality was investigated. Through the advanced design of the gasification reactor by operating the lower part as bubbling bed and the upper part as counter-current column, the gas-solid interactions between downward flowing hot bed material particles with upwards flowing product gas could be enhanced. This was realized by equipping the counter-current column with constrictions, which increase the residence time and the bed material hold-up. Thus, the conversion efficiency of the fuel including the tar was improved. For the investigations three different experimental campaigns converting softwood pellets using a mixture of olivine and limestone (50/50 wt.-%), a mixture of feldspar and limestone (50/50 wt.-%), and 100 wt.-% quartz as bed materials were conducted. Higher H2 contents and lower contents of higher hydrocarbons could be detected along the height of the counter-current column. Especially heavy tar compounds could be reduced significantly. These two effects are explained by enhanced water gas shift and steam reforming reactions. In case of catalytically inactive quartz, only thermal effects are available and therefore lower effects on tar reduction could be obtained.
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For further information contact us at helpdesk@openaire.euAccess RoutesGreen hybrid 39 citations 39 popularity Top 10% influence Top 10% impulse Top 10% Powered by BIP!
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal 2019Publisher:Elsevier BV Authors: Hermann Hofbauer; J.C. Schmid;Josef Fuchs;
Josef Fuchs
Josef Fuchs in OpenAIREStefan Müller;
Stefan Müller
Stefan Müller in OpenAIREAbstract Dual fluidized bed steam gasification is a well-known technology for the thermochemical conversion of biogenic fuels into a valuable product gas comprising hydrogen, carbon monoxide, carbon dioxide, and methane. Based on the dual fluidized bed gasification principle, further benefits can be obtained by considering the bed material: Limestone allows the removal of carbon dioxide from the gasification reactor and its release in the combustion reactor. Therefore, the gasification and combustion reactors must be operated at 650 °C and 830 °C, respectively. Moreover, this sorption enhanced reforming process affords hydrogen contents of ~70 vol.-%db and allows an adjustment of the hydrogen-to-carbon monoxide ratio in the range of 2–10. The circulating bed material undergoes carbonation and calcination cycles, that lead to a decrease in the carbon dioxide sorption capacity with time. This paper discusses the main reasons for this decrease as well as the positive or negative effects of steam and carbon dioxide. The major disadvantage of using limestone in the fluidized beds is its low attrition resistance. Thus, gentle separation units for the limestone as bed material are recommended to overcome this problem. Several process configurations have been published by different institutions, mainly by IFK Stuttgart and TU Wien. The most important experimental and theoretical results, including the dependence of the product gas composition on the gasification temperature and the bed material cycle rate, tar content in the product gas, and test runs in the industrial scale are summarized and discussed. Sorption enhanced reforming of different fuel types, sorption enhanced reforming with oxyfuel combustion, and performance indicating key figures of the process are also investigated.
Renewable and Sustai... arrow_drop_down Renewable and Sustainable Energy ReviewsArticle . 2019 . 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.
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For further information contact us at helpdesk@openaire.eu90 citations 90 popularity Top 1% influence Top 10% impulse Top 1% Powered by BIP!
more_vert Renewable and Sustai... arrow_drop_down Renewable and Sustainable Energy ReviewsArticle . 2019 . 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.
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