Kinetics and Modelling of Levulinic Acid Esterification in Batch and Continuous Reactors

Kinetics and Modelling of Levulinic Acid Esterification in Batch and Continuous Reactors The ethyl ester of levulinic acid, ethyl levulinate is a completely bio-based chemical made from levulinic acid, which is a hydrolysis product of cellulose and bio-ethanol. The very precise kinetics of levulinic acid esterification with ethanol was studied in an isothermal batch reactor in the presence of homogeneous (H SO ) and heterogeneous catalysts (cation 2 4 exchange resin Smopex-101). The temperature interval of the experiments was 50–70 °C. A kinetic model was proposed for both kinds of catalysts, adopting equilibrium rate expressions in any case. The different role of the catalyst used was considered separately, while a unique equilibrium constant was assumed for each system. The kinetic parameters were suc- cessfully determined by non-linear regression analysis. The model gave a very good description to the experimental data. The heterogeneous catalyst was used to demonstrate the feasibility of continuous operation in isothermal fixed bed reactors. The catalyst showed a good stability and high conversions of levulinic acid were obtained in the laboratory-scale fixed bed reactor. The model was able to predict both dynamic and steady-state experimental data. Keywords Environmentally friendly chemicals · Catalysis · Batch and continuous technology Abbreviations K Eq uilibrium constant (–) EtLA Ethyl levulinate k Self-cat alyzed rate constant http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Topics in Catalysis Springer Journals

Kinetics and Modelling of Levulinic Acid Esterification in Batch and Continuous Reactors

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Publisher
Springer US
Copyright
Copyright © 2018 by Springer Science+Business Media, LLC, part of Springer Nature
Subject
Chemistry; Catalysis; Physical Chemistry; Pharmacy; Industrial Chemistry/Chemical Engineering; Characterization and Evaluation of Materials
ISSN
1022-5528
eISSN
1572-9028
D.O.I.
10.1007/s11244-018-0998-y
Publisher site
See Article on Publisher Site

Abstract

The ethyl ester of levulinic acid, ethyl levulinate is a completely bio-based chemical made from levulinic acid, which is a hydrolysis product of cellulose and bio-ethanol. The very precise kinetics of levulinic acid esterification with ethanol was studied in an isothermal batch reactor in the presence of homogeneous (H SO ) and heterogeneous catalysts (cation 2 4 exchange resin Smopex-101). The temperature interval of the experiments was 50–70 °C. A kinetic model was proposed for both kinds of catalysts, adopting equilibrium rate expressions in any case. The different role of the catalyst used was considered separately, while a unique equilibrium constant was assumed for each system. The kinetic parameters were suc- cessfully determined by non-linear regression analysis. The model gave a very good description to the experimental data. The heterogeneous catalyst was used to demonstrate the feasibility of continuous operation in isothermal fixed bed reactors. The catalyst showed a good stability and high conversions of levulinic acid were obtained in the laboratory-scale fixed bed reactor. The model was able to predict both dynamic and steady-state experimental data. Keywords Environmentally friendly chemicals · Catalysis · Batch and continuous technology Abbreviations K Eq uilibrium constant (–) EtLA Ethyl levulinate k Self-cat alyzed rate constant

Journal

Topics in CatalysisSpringer Journals

Published: Jun 5, 2018

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