化工学报 ›› 2009, Vol. 60 ›› Issue (3): 750-755.

• 能源和环境工程 • 上一篇    下一篇

复合固定化脂肪酶催化麻疯树油生产生物柴油

高静;马丽;李伟杰;王丽华;周丽亚   

  1. 河北工业大学化工学院
  • 出版日期:2009-03-05 发布日期:2009-03-05

Transesterification of Jatropha oil to biodiesel catalyzed by compound immobilized lipase

GAO Jing;MA Li;LI Weijie;WANG Lihua;ZHOU Liya   

  • Online:2009-03-05 Published:2009-03-05

摘要: 对固定化复合脂肪酶催化麻疯树油合成生物柴油进行了研究,利用3因素5水平中心旋转设计的响应曲面法对反应条件进行了优化,研究了复合酶用量、复合酶配比及底物配比对反应的影响。优化结果为复合酶用量为0.27 g,N435占总酶质量的比例为0.15,乙酸甲酯与麻疯树油的摩尔比为10.10,预测生物柴油得率为72.55 %,与实际产率74.34 %吻合较好。并建立了复合酶催化合成生物柴油反应的动力学方程,反应为双底物抑制,符合乒乓机制。

关键词:

复合脂肪酶, 麻疯树油, 响应曲面, 酯交换反应, 生物柴油

Abstract:

The transesterification of Jatropha oil and methyl acetate to biodiesel catalyzed by a compound lipase was investigated. A 5-level-3-factor central composite rotatable design of the response surface method was used to evaluate the effects of compound enzyme amount, compound enzyme formulation and substrate composition on the yield of biodiesel. The optimum conditions were as follows: enzyme amount 0.27g, compound enzyme formulation 0.15 (mass) N234 and substrate composition of methyl acetate to Jatropha oil 10. 10. Under optimum conditions, the actual experimental yield was 74. 34%, which compared well with the predicted value of 72.55%. The model based on Ping Pong Bi Bi mechanism with substrate competitive inhibition was proposed to describe the reaction kinetics of the transesterification.

Key words:

复合脂肪酶, 麻疯树油, 响应曲面, 酯交换反应, 生物柴油