Production of biodiesel from jatropha oil using subcritical hydrolysis and supercritical methylation

• Main Authors: Ching-Hung Chen, 陳慶鴻
• Other Authors: 張傑明
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/80538458719724448293

碩士 === 國立中興大學 === 化學工程學系所 === 97 === This study investigates supercritical carbon dioxide extraction of triglycerides from Jatropha seed, followed by subcritical hydrolysis and supercritical methylation to obtain biodiesel. Effects of reaction temperature, reaction time and solvent to feed ratio on contents of free fatty acids in hydrolyzed oil and fatty acid esters in methylated oil designed by a response surface methodology were also examined. Subcritical hydrolysis of SC-CO2 extracted Jatropha oil was carried out at 543K under 1 hour reaction and at the solvent to feed ratio of 10:1 for. Following methylation of the hydrolyzed oil at 563K under 9 minutes and at the solvent to feed ratio of 3:1 yields the content of methylesters of 752.4(mg/goil), reaction conversion of the methylation attained 98.3(%). The similar two-step reaction of the oil extracted from deshelled seed results in the 99% conversion of methylation. The concentration of methyl esters reaches 985.2(mg/goil). This study shows that subcritical hydrolysis and supercritical methylation of the supercritical extracted oil are feasible to produce Jatropha biodisel.