Optimization of pretreatment of Jatropha oil with high free fatty acids for biodiesel production  

作　　者：Supriyono SUWITO Giuliano DRAGONE Hary SULISTYO Bardi MURACHMAN Suryo PURWONO Jose TEIXEIRA 

机构地区：[1]Institute for Biotechnology and Bioengineering, Centre of Biological Engineering, University of Minho, Braga 4710-057, Portugal [2]Chemical Engineering Department, Gadjah Mada University, Yogyakarta 55281, Indonesia

出　　处：《Frontiers of Chemical Science and Engineering》2012年第2期210-215,共6页化学科学与工程前沿（英文版）

摘　　要：A central composite rotatable design and response surface methodology were used in order to investigate the individual and combined effects of the ethanol-to-oil ratio, H2SO4 concentration, temperature and time of reaction on the reduction of free fatty acid （FFA） in jatropha oil. A quadratic polynomial model relating the reaction variables with FFA reduction was developed, presenting a good coefficient of determination （R2= 0.893）. For reducing FFA to less than 1%, the optimal combination was found to be 0.62 v.v^-1 ethanol-to-oil ratio （14.9 v.v^-1 ethanol-to-FFA ratio）, 1.7% v.vI H2SO4 concentration, and 79 rain reaction time at a reaction temperature of 54℃. These results are of great relevance to maximize methyl esters formation by transesterification using an alkaline catalyst.A central composite rotatable design and response surface methodology were used in order to investigate the individual and combined effects of the ethanol-to-oil ratio, H2SO4 concentration, temperature and time of reaction on the reduction of free fatty acid （FFA） in jatropha oil. A quadratic polynomial model relating the reaction variables with FFA reduction was developed, presenting a good coefficient of determination （R2= 0.893）. For reducing FFA to less than 1%, the optimal combination was found to be 0.62 v.v^-1 ethanol-to-oil ratio （14.9 v.v^-1 ethanol-to-FFA ratio）, 1.7% v.vI H2SO4 concentration, and 79 rain reaction time at a reaction temperature of 54℃. These results are of great relevance to maximize methyl esters formation by transesterification using an alkaline catalyst.

关 键 词：BIODIESEL BIOFUEL ESTERIFICATION free fatty acids jatropha curcas oil 

分 类 号：TS251.65[轻工技术与工程—农产品加工及贮藏工程] Q949.753.5[轻工技术与工程—食品科学与工程]