Kinetics of enzymatic synthesis of liquid wax ester from oleic acid and oleyl alcohol

Mat Radzi, Salina and Mohamad, Rosfarizan and Basri, Mahiran and Salleh, Abu Bakar and Ariff, Arbakariya and Abdul Rahman, Mohd Basyaruddin and Raja Abdul Rahman, Raja Noor Zaliha (2010) Kinetics of enzymatic synthesis of liquid wax ester from oleic acid and oleyl alcohol. Journal of Oleo Science, 59 (3). pp. 127-134. ISSN 1347-3352

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Abstract

The kinetics of wax ester synthesis from oleic acid and oleyl alcohol using immobilized lipase from Candida antartica as catalyst was studied with different types of impeller (Rushton turbine and AL-hydrofoil) to create different mixing conditions in 2l stirred tank reactor. The effects of catalyst concentration, reaction temperature, and impeller tip speed on the synthesis were also evaluated. Rushton turbine impeller exhibited highest conversion rate at lower impeller tip speed as compared to AL-hydrofoil impeller. A second-order reversible kinetic model from single progress curve for the prediction of fractional conversion at given reaction time was proposed and the corresponding kinetic parameter values were calculated by non-linear regression method. The results from the simulation using the proposed model showed satisfactory agreement with the experimental data. Activation energy shows a value of 21.77 Kcal/mol. The thermodynamic parameters of the process, enthalpy and entropy, were 21.15 Kcal/mol and 52.07 cal/mol.K, respectively.

Item Type:Article
Keyword:Wax ester; Immobilized lipase; Esterification; Kinetics
Subject:Enzyme kinetics
Subject:Immobilized enzymes
Subject:Esterification
Faculty or Institute:Faculty of Biotechnology and Biomolecular Sciences
Publisher:Japan Oil Chemists' Society
ID Code:15389
Deposited By: Nida Hidayati Ghazali
Deposited On:26 Jul 2012 02:01
Last Modified:19 Dec 2012 07:15

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