2008•Renewable Energy ResourcesRequires access
Optimization of solid base-catalyzed biodiesel by response surface methodology.
Lu DingQiang, Duan Liu, Chen Jian-hui, Wu YaShuang, Ling Xiu-quan
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Abstract
Transesterification using the solid sodium silicate catalyst to prepare biodiesel was studied.The factors of temperature,catalyst concentration,reaction time,methanol to oil molar ratio on the conversion of biodiesel were optimized with Box-Behnken mode of response surface methodology.And a mathematical regression model for the conversion of biodiesel was built,the test of significance and variance analysis for regression equation were also analyzed.The result showed that the optimum condition for the production of biodiesel catalyzing by solid sodium silicate catalyst were: temperature at 66 ℃,2.1% catalyst of oil,reaction time for 7 h,and methanol to oil molar ratio of 8.6∶1,the predicted optimum conversion rate of biodiesel was 75.78%,which was in consistent with the measured value,the regression equation is valid and reliable.