摘要
探讨了超声波辅助条件下采用新型固体酸S2O82-/A l2O3-ZrO2-La2O3替代传统的液体酸、碱催化剂,催化棉籽油与甲醇进行酯交换反应制备生物柴油。考察了超声波频率、功率、固体酸催化剂用量、醇油摩尔比、反应温度等因素对产物中甲酯含量的影响。结果表明,在超声波辅助下,固体酸催化剂对棉籽油酯交换具有较好的催化活性和稳定性,产物与催化剂易于分离。在超声波频率28 Hz、功率80 W、反应温度140℃、醇油摩尔比15∶1、固体酸催化剂用量为油质量的4%的条件下,反应3 h产物中棉籽油甲酯含量达到97.1%,催化剂重复使用十次甲酯含量可维持在90%左右。
Biodiesel was obtained through transesterification of cottonseed oil with ultrasonic assistant, using S2O8^2-/ Al2O3-ZrO2-La2O3 as a solid acid catalyst to replace traditional liquid acid and alkali catalysts. The effects of ultrasonic frequency, ultrasonic power, solid acid catalyst dosage, methanol/oil molar ratio, reaction temperature on the reaction were studied. The experimental results indicated that the solid acid catalyst of S2O8/^2-/Al2O3-ZrO2-La2O3 had a higher activity and stability on the transesterification of cottonseed oil. Under the transesterifieation conditions of ultrasonic frequency of 28 Hz,ultrasonic power of 80 W,reaction temperature of 140°C ,methanol/oil molar ratio of 15：1 ,solid acid catalyst dosage of 4% ,reaction time of 3 h,content of fatty acid methyl ester in cottonseed oil could reached 97.1%. The fatty acid methyl ester content remained 90% after the solid acid catalyst was reused ten times.
出处
《拖拉机与农用运输车》
2009年第2期55-57,61,共4页
Tractor & Farm Transporter
关键词
超声波
固体酸
棉籽油
酯交换反应
生物柴油
Ultrasonic wave
Solid acid
Cottonseed oil
Transesterification
Biodiesel
作者简介
杨学林（1969-），男，工程师，讲师，主要从事天然资源加工、生物质能源、有机合成的教学和研究工作。
