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image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
Chemical Engineering Journal
Article . 2015 . Peer-reviewed
License: Elsevier TDM
Data sources: Crossref
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Kinetic modelling of the solventless synthesis of solketal with a sulphonic ion exchange resin

Authors: Esteban, J.; Ladero, M.; García-Ochoa, F.;

Kinetic modelling of the solventless synthesis of solketal with a sulphonic ion exchange resin

Abstract

Abstract Synthesis of solketal from acetone and glycerol is approached in this work through a batch process in the absence of solvents. A heterogeneous catalysis approach was employed using the resin Lewatit GF101 as catalyst after selection from a few other sulphonic ion exchange resins. An initial study of the external mass transfer revealed that a stirring rate of 750 rpm sufficed for the external mass transfer not to be the rate limiting step. Similarly, a study of the internal mass transfer showed that for particle sizes of 190 μm the maximum reaction rate was achieved. Once the optimal stirring and particle size conditions were determined, a series of kinetic runs was conducted varying temperature (30–40 °C), initial molar excess of acetone to glycerol (3–12) and catalyst load (0.5–1% w/w) for this reaction in equilibrium. Different kinetic models based on potential laws and Eley–Rideal (ER) and Langmuir–Hinshelwood–Hougen–Watson (LHHW) equations were proposed to fit to the experimental data obtained. After physical and statistical discrimination, an ER accounting for the direct and reverse reaction was selected, with activation energies of 124.0 ± 12.9 kJ mol −1 and 127.3 ± 12.6 kJ mol −1 for the direct and reverse reaction, respectively, and enthalpy of adsorption of 128.0 ± 21.4 kJ mol −1 for the adsorption constant of water.

Country
United Kingdom
Related Organizations
Keywords

Glycerol, Kinetic modeling, Maximum reaction rate, Catalysis, Acetone, Actinides, Ion exchange resin, Activation energy, Mass transfer, Kinetic theory, Reaction kinetics, Solventless synthesis, Ions, Internal mass transfer, Catalysts, Batch data processing, Particle size, Kinetic model, Enthalpy of adsorption, Kinetics, Ion exchange resins, External mass transfer, Synthesis (chemical), Adsorption, Kinetic parameters, Solketal, Ion exchange, Langmuir-Hinshelwood-Hougen-Watson

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
78
Top 10%
Top 10%
Top 10%
Related to Research communities
Energy Research