Synthesis of biodiesel in supercritical alcohols and supercritical carbon dioxide

Varma, MN and Deshpande, PA and Madras, G (2010) Synthesis of biodiesel in supercritical alcohols and supercritical carbon dioxide. In: Fuel, 89 (7). pp. 1641-1646.

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Abstract

Biodiesel was synthesized in supercritical fluids by two routes: non-catalytically in supercritical alcohols and by enzyme catalysis in supercritical carbon dioxide. Two oils, sesame oil and mustard oil, and two alcohols, methanol and ethanol, were used for the synthesis. Complete conversion was observed for synthesis in supercritical alcohols whereas only a maximum of 70% conversion was observed for the enzymatic synthesis in supercritical carbon dioxide. For the synthesis in supercritical alcohols, the activation energies and pseudo-first order rate constants were determined. For the reactions in supercritical carbon dioxide, a mechanism based on ping pong bi-bi was proposed and the kinetic parameters were determined. (C) 2009 Elsevier Ltd. All rights reserved.

Item Type:	Journal Article
Publication:	Fuel
Publisher:	Elsevier Science
Additional Information:	Copyright of this article belongs to Elsevier Science.
Keywords:	Supercritical fluids;Transesterification;Enzymatic synthesis;Sesame oil;Mustard oil
Department/Centre:	Division of Mechanical Sciences > Chemical Engineering
Date Deposited:	13 Jul 2010 06:39
Last Modified:	19 Sep 2010 06:10
URI:	http://eprints.iisc.ac.in/id/eprint/29129

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