季胺碱改性蒙脱土催化酯交换制备生物柴油  

Preparation of Biodiesel With Transesterification Over Montmorillonite Modified by Alkali Tetramethylammonium

作　　者：梁金花[1] 缪青松 杨寿海[1] 杨晓瑞[1] 朱建良[1] 

机构地区：[1]南京工业大学生物与制药工程学院,江苏南京211816

出　　处：《石油学报（石油加工）》2014年第5期804-809,共6页Acta Petrolei Sinica(Petroleum Processing Section)

基　　金：江苏省博士后科研计划项目(1001016C)基金资助

摘　　要：采用离子交换法,以4种不同碳链长度的季铵盐对钠基蒙脱土进行插层改性,并采用FT-IR、XRD对改性蒙脱土进行表征;考察了其在大豆油与甲醇酯交换合成生物柴油反应中的催化性能。结果表明,4种季胺盐改性蒙脱土催化剂中,四甲基溴化铵改性蒙脱土对大豆油与甲醇酯交换反应的催化活性最高。以此改性蒙脱土为催化剂,在催化剂质量分数(以大豆油质量计)1.5%、醇/油质量比12、反应温度65℃、反应时间5h条件下,大豆油与甲醇酯交换反应生物柴油产率达到91.2%。该催化剂重复使用7次后活性并无明显下降,表明有机改性蒙脱土是一种潜在的制备生物柴油的有机-无机复合催化材料。A variuos montmorillonite catalysts intercalated by four quaternary ammonium salts with differnt carbon chain lenghths were prepared via ion exchange method,and were characterized by FT-IR and XRD.The catalytic performances of the modified montmorillonite catalysts in the interesterification of soybean oil with methanol to produce biodiesel were investigated.The results indicated that the montmorillonite modified by the tetramethylammonium bromide possessed the highest catalytic activity among the four modified montmorillonite catalysts.The yield of biodiesel could reach 91.2%at 65℃of reaction temperature in 5hunder the mass ratio of methanol to oil 12 and that of catalyst to oil 1.5%.The catalytic performance of the optimum catalyst could remain after using 7times.It was demonstrated that the organic montmorillonite catalyst was a potentially organic-inorganic compound catalytic materials for production of biodiesel.

关 键 词：生物柴油 酯交换反应 蒙脱土 季铵盐 

分 类 号：TQ517.4[化学工程]