Journal
FUEL
Volume 89, Issue 7, Pages 1641-1646Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.fuel.2009.08.012
Keywords
Supercritical fluids; Transesterification; Enzymatic synthesis; Sesame oil; Mustard oil
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Funding
- Department of Biotechnology, India
- Department of Science and Technology, India
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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.
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