作　　者： ; ; ; ; ;

机构地区： 四川理工学院生物工程学院

出　　处： 《化学与生物工程》 2008年第1期24-26,共3页

摘　　要： 研究了利用餐饮业废油脂和甲醇，在无溶剂系统中通过脂肪酶的转酯作用来生产生物柴油。结果表明，醇油摩尔比为3：1时甲醇转化率只能达到48％左右，醇油摩尔比低于1：1时甲醇转化率能达到95％以上，采用分批添加法，甲醇总转化率可以明显提高到80％以上。反应体系的最适初始水活度应控制在0．54～0．75之间，随着反应温度的升高，酯交换反应的速度加快，但酶失活率也随之增大。 The transesterfication of cooking waste oil and methanol to biodiesel in a solvent free system catalyzed by lipase was studied. The results indicated that methanol conversion rate could achieve only 48% when molar ratio of methanol to oil was 3：1, while it could be enhanced up to 95% when molar ratio of methanol to oil was lower than 1：1. When methanol was added by fed-batch technique,the total methanol conversion rate would be above 80%. The optimum initial water activity of the reaction system was 0.54-0.75. And with the rising of reaction temperature,the transesterification reaction would speed up while the deactivation rate of enzyme was increased.

关 键 词： 脂肪酶 废油脂 转酯反应 生物柴油

领　　域： [化学工程] [生物学]