Synthesis of biodiesel in supercritical fluids

Madras, Giridhar and Kolluru, Chandana and Kumar, Rajnish (2004) Synthesis of biodiesel in supercritical fluids. In: Fuel, 83 (14-15). pp. 2029-2033.

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Abstract

Biodiesel, an alternative biodegradable diesel fuel, is derived from triglycerides by transesterification with alcohols. In this work, the transesterification of sunflower oil was investigated in supercritical methanol and supercritical ethanol at various temperatures $(200-400^o C)$ at 200 bar. The rate coefficients and the activation energies of the reaction were also determined. Biodiesel was also enzymatically synthesized in supercritical carbon dioxide. The effect of enzyme loading, oil to alcohol ratio, reaction time and temperature was investigated. While nearly complete conversions were obtained for the thermal reactions in supercritical methanol and ethanol, only 30% conversions were obtained in the enzyme-catalyzed reactions in supercritical carbon dioxide

Item Type:	Journal Article
Publication:	Fuel
Publisher:	Elsevier
Additional Information:	The copyright belongs to Elsevier.
Keywords:	Biodiesel;Transesterification;Novozym-435 (Candida Antarctica);Supercritical methanol;Supercritical ethanol;Supercritical carbon dioxide
Department/Centre:	Division of Mechanical Sciences > Chemical Engineering
Date Deposited:	24 Apr 2006
Last Modified:	19 Sep 2010 04:25
URI:	http://eprints.iisc.ac.in/id/eprint/6446

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