乙酸甲酯体系酶催化法生产生物柴油的后处理精制工艺

Purification Process Design and Simulation of Enzyme-catalyzed Biodiesel Production Using Methyl Acetate as Acyl Acceptor

乙酸甲酯代替甲醇作为酯交换的酰基受体,可避免甲醇和甘油对酶催化剂的损害．本工作根据乙酸甲酯体系制备生物柴油的特点,提出了相应的生物柴油后处理精制工艺,并根据实验研究给出了可行的操作工艺参数及物料衡算,所得成品精生物柴油符合DINE 51606质量标准．应用化工模拟软件Pro/Ⅱ模拟计算了粗生物柴油精馏的影响因素．结果表明,精馏塔理论板数7～11块、塔顶绝对压力133～1333 Pa、回流比1．5～3．0是较优的减压精馏操作范围．

Using methyl acetate as acyl acceptor instead of methanol, enzyme-catalyst was saved from the harm of methanol and glycerol. In this work, biodiesel purification process of methyl acetate reaction system was carded out. Moreover, feasible operation parameters and material balance were also obtained based on the results of purification experiments. The final end-product, refined biodiesel, could meet the strict criterion of DINE 51606. The vacuum rectification of crude biodiesel was analyzed by simulation software Pro/If to assess the influential factors on it. The computing results showed that the preferred operation parameters of the vacuum rectification column would be in the ranges of 9-11 pieces of theoretical trays, 133-1333 Pa at the top of distillation column and 1.5-3.0 of the reflux ratio.