摘要
本文采用了实验室自制的Candida sp.99-125脂肪酶,研究了其在丁二酸二酯磺酸钠(AOT)反胶束体系中,催化大豆色拉油合成生物柴油的新方法。考察了溶剂极性、AOT浓度、W_0(水与表面活性剂质量比)、缓冲溶液pH值、温度等因素对脂肪酶催化合成生物柴油的影响。研究结果表明:AOT/异辛烷反胶束体系为Candida sp.99-125脂肪酶催化提供了较为合适的微环境,在W_0为11,表面活性剂浓度为50 mmol/L,温度为40℃,缓冲液pH值为7的AOT/异辛烷反胶束体系中,醇油摩尔比为3:1,摇床转速为180 r/min,采用12h3次流加1 mol当量的甲醇,单批最高酯转化率可以达到90%。
We used Candiada sp. 99-125 lipase in bis (2-ethylhexyl) sulfosuccinate (AOT) reversed micellar systems to produce biodiesel from soybean oil. We studied the effects of solvent, concentration of AOT, ratio of water and AOT, buffer pH, temperature and rotating speed on the transesterification. Results showed that AOT reversed micellar systems provided a suitable mi- cro-environment for biodiesel production. The optimal parameters were: the ratio of water and AOT 1 l, AOT concentration 50 mmol/L, temperature 40℃, pH 7, molar ratio of methano and oil 3, and rotating speed 180 r/min. The transesterification rate reached 90% when a 3-step methanolysis protocol was used.
出处
《生物工程学报》
CAS
CSCD
北大核心
2008年第1期142-146,共5页
Chinese Journal of Biotechnology
基金
国家自然科学基金资助(No.20576013)
杰出青年基金资助(No.20325622)
北京市自然基金(No.2071002)~~
关键词
反胶束
脂肪酶
生物柴油
酯交换
reversed micellar, lipase, biodiesel, transesterification