摘要
利用脂肪酶LVK在以正己烷为溶剂的体系中催化菜籽油与乙醇酯交换合成生物柴油。为提高酯交换率,采用响应面实验设计和分析方法对菜籽油的酯交换反应条件进行优化,得到最佳工艺条件:醇油摩尔比5.3∶1,脂肪酶与油脂的质量比为15%,反应温度40℃,反应时间34.5 h,溶剂(正已烷)量18.4%,乙醇一次加入,在此工艺条件下菜籽油的酯交换率达到93.48%。结果表明正己烷体系能很好解决乙醇与菜籽油的互溶性,消除乙醇对脂肪酶的毒害作用。
The technological process for producing biodiesel from rapeseed oil transesterificated by ethanol with lipase LVK as a catalyzer in hexane was optimized. In order to improve the rate of transesterification, the response surface methodology was used to optimize the reaction process. Optimum conditions for the production of ethyl esters were as follows： the molar ratio of ethanol to rapeseed oil is 5.3 ： 1, concentration of catalyst 15.0~, solvent（hexane） concentration 18.4%, reaction temperature 40℃ and reaction time is 34. 5 h, respectively. Under these optimized conditions, the transesterification ratio reached 93.48% when ethanol was added only once. The result shows that this solvent system with hexane cannot only improve the solubility between ethanol and rapeseed oil, but also eliminate the denaturalization effect of ethanol to lipase.
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2007年第12期203-207,共5页
Transactions of the Chinese Society of Agricultural Engineering
基金
国家973计划资助项目(2003CB716004)
湖南省自然科学基金资助项目(02JJY5001)
关键词
酯交换率
脂肪酶
菜籽油
生物柴油
响应面
transesterification ratio
lipase
rapeseed oil
biodiesel
response surface
