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|標題:||Subcritical hydrolysis and supercritical methylation of supercritical carbon dioxide extraction of Jatropha oil||作者:||Chen, C.H.
|關鍵字:||Jatropha curcus;Supercritical extraction;Subcritical hydrolysis;Supercritical methylation;Biodiesel;biodiesel fuel production;rapeseed oil;methanol;transesterification;kinetics;lipase;esters;curcas;plant;water||Project:||Separation and Purification Technology||期刊/報告no：:||Separation and Purification Technology, Volume 74, Issue 1, Page(s) 7-13.||摘要:||
This study investigates supercritical carbon dioxide (scCO(2)) extraction of triglycerides from powdered Jatropha curcas crude seeds followed by subcritical hydrolysis and supercritical methylation of the oil extracted by scCO(2) to obtain biodiesel. Effects of the reaction temperature, the reaction time and the solvent to feed ratio on free fatty acids in the hydrolyzed oil and fatty acid esters in the methylated oil via two experimental designs were also examined. Supercritical methylation of the hydrolyzed oil following subcritical hydrolysis of the scCO(2) extract yielded a methylation reaction conversion of 98.3%. The activation energy of hydrolysis and trans-esterified reactions were 50.2 and 23.9 kJ/mole, respectively. This study demonstrates that supercritical methylation preceded by subcritical hydrolysis of the scCO(2) oil is a feasible two-step process in producing biodiesel from powdered Jatropha seeds. (C) 2010 Elsevier B.V. All rights reserved.
|Appears in Collections:||生物科技發展中心|
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