KF/CaO as solid base catalyst for transesterification to biodiesel by ultrasound
-
摘要: 等体积浸渍法制备了KF/CaO固体碱催化剂，用于催化大豆油与甲醇酯交换反应制备生物柴油，在反应体系中引入超声作为辅助条件。研究表明，KF/CaO催化活性高。在超声的辅助作用下，酯交换反应速率加快，生物柴油的收率提高。实验考察了反应条件对产品中脂肪酸甲酯含量的影响。醇油摩尔比为12∶1，反应温度65℃，催化剂与大豆油的质量比为3%,反应1h，超声频率20kHz，超声声强1.01W/cm2，在此反应条件下，产品中脂肪酸甲酯的质量分数达到99.6%。Abstract: Biodiesel fuel, chemically consisted of fatty acid methylester (FAME) produced by methanolysis of natural triglycerides such as animal fats and vegetable oils, is a kind of biomass energy. KF/CaO was used as solid base catalyst for transesterification to produce biodiesel fuel with ultrasound as an auxiliary means. Compared with mechanical stirring, ultrasound treatment is an effective method to increase the yield of biodiesel and shorten the reaction time. By single factor method, the optimization of reaction conditions has been studied with ultrasound. The results show that the reaction conditions are as following. The weight ratio of catalyst to oil is 3%, and molar ratio of methanol to oil is 12. The sound frequency is 20kHz with intensity of 1.01W/cm2. Under the above conditions, the yield of biodiesl reaches 99.6% at 65℃ in 1h.
-
Key words:
- transesterification /
- biodiesel /
- ultrasound /
- KF/CaO
-
点击查看大图
计量
- 文章访问数: 1878
- HTML全文浏览量: 24
- PDF下载量: 1662
- 被引次数: 0
下载:
