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Influence of the operating conditions and the external mass transfer limitations on the synthesis of fatty acid esters using a Candida antarctica lipase

Paper ID Volume ID Publish Year Pages File Format Full-Text
18031 42710 2007 7 PDF Available
Title
Influence of the operating conditions and the external mass transfer limitations on the synthesis of fatty acid esters using a Candida antarctica lipase
Abstract

The enzymatic esterification of fatty acids (mainly oleic acid) and ethanol is studied in this work. The reactions are catalyzed by commercial immobilized lipases from Candida antarctica (Novozyme 435) and are carried out in a batch reactor at solvent free conditions. The influence of several important reactions conditions as temperature, initial molar ratio, initial water percentage, and enzyme percentage on the equilibrium conversion and the initial reaction rates is carefully analyzed. A non-linear relationship is established between the initial reaction rates and the enzyme percentage. An optimum value of the initial molar ratio is detected for each enzyme percentage and the effect of inhibition by alcohol is confirmed. Under the studied conditions, it is demonstrated that the influence of the external mass transfer resistance on the reaction rate is not significant. Therefore, the experimental data are appropriated for kinetic modeling purposes.

Keywords
Ac, fatty acid (mainly oleic acid); Al, ethyl alcohol; Es, fatty acid ester (mainly ethyloleate); SFS, solvent free system; Wa, waterEnzyme; Esterification; Solvent free medium; Fatty acid esters; Immobilized lipases; Multiphase reactors
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Influence of the operating conditions and the external mass transfer limitations on the synthesis of fatty acid esters using a Candida antarctica lipase
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Publisher
Database: Elsevier - ScienceDirect
Journal: Enzyme and Microbial Technology - Volume 40, Issue 4, 5 March 2007, Pages 716–722
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
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