超声波辅助潲水油直接酯交换法制备生物柴油

Biodiesel oil production through direct transesterificaton of waste cooking oil with alcohol via ultrasonic wave

采用潲水油和甲醇为原料,KOH作为催化剂,通过酯交换反应制备生物柴油。综合考察了反应时间、反应温度、催化剂用量、醇油摩尔比和超声波功率5个因素对酯交换反应制备生物柴油的影响。并且采用L9(34)正交试验法对实验结果进行分析和优化,最终确定反应的最佳条件如下:醇油摩尔比为8∶1、催化剂用量为油重的1.2%、反应时间为50min、反应温度为70℃,超声波功率为400W,转化率最高可达97.53%。

Biodiesel oil was prepared from waste cooking oil and methanol, the ester exchange reaction was conducted under ultrasonic condition with alkali as the catalyst. Five factors influencing on the transesterification reaction of biodiesel oil production were discussed,including the reaction time, reaction temperature,amount of catalyst,molar ratio of methanol to oil and ultrasonic power. A series of laboratory experiments were carried out to test the conversion of biodiesel oil under various conditions. The process of biodiesel oil production was optimized by application of orthogonal test obtained the optimum conditions for biodiesel oil synthesis. The results showed that the optimum reaction conditions were： molar ratio of oil to methanol 8： 1, catalyst 1. 2 KOH/100g oil, reaction temperature 70℃, reaction time 50min, ultrasonic power 400W. The conversion rate may up to 97.53%.