引用本文:
盛梅, 杨文伟, 郭登峰. 固定化脂肪酶催化合成生物柴油[J]. 应用化学,
2005, 22(7): 788-791.
Citation: SHENG Mei, YANG Wen-Wei, GUO Deng-Feng. Production of Biodiesel Fuel from Rapeseed Oil and Methanol Under Catalysis of Immobilized Lipase[J]. Chinese Journal of Applied Chemistry, 2005, 22(7): 788-791.
Citation: SHENG Mei, YANG Wen-Wei, GUO Deng-Feng. Production of Biodiesel Fuel from Rapeseed Oil and Methanol Under Catalysis of Immobilized Lipase[J]. Chinese Journal of Applied Chemistry, 2005, 22(7): 788-791.
固定化脂肪酶催化合成生物柴油
摘要:
研究了菜籽油与甲醇在固定化脂肪酶催化作用下转酯反应生成菜籽油甲酯(即生物柴油)的过程,考察了酶的预处理方式、反应体系含水量、醇与油摩尔比和甲醇的加入方式等对产物中甲酯含量的影响。结果表明,将酶在油酸甲酯中浸泡2 h,用菜籽油洗涤,再在菜籽油中浸泡12 h后,可明显提高其催化活性,加快醇解反应速率。原料菜籽油和甲醇本身含有的微量水,可激活酶的催化活性,加快醇解反应速率,体系含水量过高反而使酶的活性有所下降。酶催化菜籽油醇解反应最适醇与油摩尔比为3:1,甲醇分3次加入,可避免酶在甲醇溶液中失活,最终产物中甲酯含量高达99%以上。
English
Production of Biodiesel Fuel from Rapeseed Oil and Methanol Under Catalysis of Immobilized Lipase
Abstract:
The production of biodiesel from rapeseed oil and methanol was performed under the catalysis of immobilized Candida antarctica lipase.The effects of the preincubation of the enzyme,water content,the molar ratio of the oil to methanol and the way for addition of methanol on the methanolysis reaction rate were investigated.The experiment showed that the methanolysis progressed much faster when immobilized lipase was preincubated in methyl oleate for 2 h and subsequently in rapeseed oil for 12 h.Trace water contained in rapeseed oil and methanol increased the methanolysis reaction rate,but adding water in the reaction mixture was found to suppress the methanolysis reaction catalyzed by immobilized lipase.The suitable molar ratio of methanol to the oil is 3:1,lipase inactivation is avoided by three-step addition of methanol.A high methyl ester content above 99% can be achieved.
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Key words:
- transesterification
- / immobilized lipase
- / rapeseed oil
- / methanol
- / biodiesel
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