超声波辅助管式反应器连续制备生物柴油的研究

摘要

Using the KOH as catalyst and jatropha curcasl oil as raw material,by using home-made tubular reactor,experimental study was conducted to produce biodiesel by transesterification with the ultrasonic assistant,and the molar ratio of methanol to jatropha curcasl oli,the amount of catalysts,ultrasonic power,material velocity and reaction temperature were investigated.The optimum conditions were determined with single factor experiment.The experimental results showed that the conversion rate of jatropha curcasl oil was 91.84％ by following conditions:50 ℃ of bath temperature,6∶1 ratio of methanol to oil,1.5％ of catalyst dosage,ultrasonic power 180 W and 3.3 mL/min of flow velocity.With ultrasonic assistant,it can shorten the reaction time,and the technology has some advantages of simple operation,continuous reaction,convenient separation of products,being full of practicality.%以KOH为催化剂和小桐子油为原料,利用自制的管式反应器,在超声波辅助下进行酯交换反应制备生物柴油的试验研究,考察醇油比、催化剂用量、超声波功率、反应时间和水浴温度等因素对转化率的影响.通过单因素确定最佳反应条件:在水浴温度为50℃,醇油比为6∶1,催化剂用量为1.5％,超声波功率为180 W,流速为3.3 mL/min时,转化率达到91.84％.在超声波辅助下,反应时间大大缩短,并且这种管式连续酯交换制备生物柴油技术具有操作简单、反应连续、产物分离方便等优点,具有很好的实用价值.