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Kinetic modeling of enzymatic ethyl oleate synthesis carried out in biphasic systems

Paper ID Volume ID Publish Year Pages File Format Full-Text
43192 45958 2008 8 PDF Available
Title
Kinetic modeling of enzymatic ethyl oleate synthesis carried out in biphasic systems
Abstract

This work presents a new approach for the kinetic modeling of solvent free ethyl oleate synthesis, catalyzed by an enzymatic catalyst. The biocatalyst used was the lipase from Candida antarctica B immobilized onto chitosan powder. Thermodynamic calculations revealed that the addition of water to hydrate the biocatalyst, or the production of water during esterification leads to a biphasic reaction medium, due to the formation of a second aqueous phase. A rigorous reactor model is proposed to calculate compositions over time, and to fit kinetic parameters, considering mass transfer and chemical reaction simultaneously. The biphasic model presented, which explicitly considers the presence of a second phase, is compared with the traditional monophasic approach that ignores the biphasic nature of reaction medium. The best-fitted monophasic model is not able to represent experimental data. On the other hand, the biphasic model allows to accurately fit experimental data, indicating the importance of modeling two-phase systems properly.

Graphical abstractIn the lipase-catalyzed solvent free esterification of oleic acid and ethanol thermodynamic calculations revealed that the addition of water to hydrate the biocatalyst, or the production of water during reaction leads to a biphasic reaction medium, due to the formation of a second aqueous phase. An rigorous reactor model is proposed to calculate compositions over time, and to fit kinetic parameters, considering chemical reaction and mass transfer between both liquid phases simultaneously.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Ethyl oleate synthesis; Solvent free; Kinetics; Enzyme; Phase equilibria; Biocatalysis
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Kinetic modeling of enzymatic ethyl oleate synthesis carried out in biphasic systems
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 334, Issues 1–2, 1 January 2008, Pages 65–72
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us