Response Surface Methodology to Optimize Biodiesel Production Conditions by Jatropha curcas oil

Abstract

Abstract: Response surface methodology(RSM)was used to optimize the conditions for biodiesel production by Jatropha curcas oil. Based on the single factor experiment, we screened the important parameters by Plackeet-burman design, and used the path of steepest ascent to approach to the biggest methyl ester yield production subsequently. Then, we obtained the optimum values of the parameters by Box-Behnken design. Predicted values were found to be in good agreement with experimental values(R-sq=0.999 and Adj R-sq=0.998), which indicated suitability of the model employed and the success of BBD in optimizing the conditions of biodiesel production process. The optimum technical conditions were: alcohol to oil molar ratio 1.72:1, lipase concentration 112.5 U each gram of oil, n-hexane content 11.96%, water content 20 %, reaction temperature at 25 ℃, and reaction time for 24 h. The methyl ester was higher 2%-3% than that under the original condition.

Key words: Jatropha curcas, oil, Lipase, Biodiesel, Response surface methodology

Zhang Xuelin, Tang Xianghua, Li Junjun, Song Tuo, Mu Yuelin, Xu Bo, Yang Yunjuan, Huang Zunxi. Response Surface Methodology to Optimize Biodiesel Production Conditions by Jatropha curcas oil[J]. Biotechnology Bulletin, 2013, 0(6): 183-187.

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