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Kinetics of enzymatic synthesis of geranyl butyrate by transesterification in various supercritical fluids

Varma, Mahesh N and Madras, Giridhar (2010) Kinetics of enzymatic synthesis of geranyl butyrate by transesterification in various supercritical fluids. In: Biochemical Engineering Journal, 49 (2). pp. 250-255.

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Official URL: http://dx.doi.org/10.1016/j.bej.2009.12.020

Abstract

The transesterification of methyl butyrate, ethyl butyrate and butyl butyrate to geranyl butyrate was investigated in supercritical carbon dioxide. The effect of chain length of the butyrate on the rate of transesterification was investigated. The initial rates followed the trend: ethyl butyrate < butyl butyrate < methyl butyrate. The transesterification of butyl butyrate to geranyl butyrate in various supercritical fluids such as ethylene, methane, ethane was also examined. The initial rate of transesterification of butyl butyrate in different supercritical fluids followed the order: ScCO2 < ScC2H6 < ScC2H4 < ScCH4. The highest initial rate was obtained in supercritical methane and the reasons for this observation were proposed. The Ping-Pong Bi-Bi model with inhibition by both acid and alcohol was used to model the experimental data and determine the kinetics of the reaction. (C) 2010 Elsevier B.V. All rights reserved.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Elsevier Science.
Keywords: Supercritical carbon dioxide; Supercritical methane; Novozym 435; Transesterification; Ping-Pong Bi-Bi mechanism; Kinetics
Department/Centre: Division of Mechanical Sciences > Chemical Engineering
Date Deposited: 09 Jun 2010 09:24
Last Modified: 19 Sep 2010 06:00
URI: http://eprints.iisc.ernet.in/id/eprint/27142

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