固体酸催化小桐子油制备生物柴油

采用新型固体酸SO4^2-/TiO2-Al2O3替代传统的液体酸、碱催化剂,催化较高酸值小桐子油与甲醇进行酯交换反应制备生物柴油.考察了搅拌速度、固体酸催化剂用量、醇油摩尔比、反应温度和助溶剂等因素对产物中甲酯含量的影响.研究结果表明,固体酸催化剂对小桐子油酯交换反应具有较好的催化活性和稳定性,产物与催化剂易于分离.在反应温度为130℃、醇油摩尔比为15∶1、固体酸催化剂用量为油质量的4%、搅拌速度为480 r/min和助溶剂正己烷与小桐子油质量比为1∶4的条件下,反应4 h产物中小桐子油甲酯含量达到97.6%,反应10次甲酯含量维持在90%左右.制备得到的生物柴油质量达到国家柴油机燃料调合用生物柴油（BD100）标准.

Preparation of biodiesel from jatropha curcas L. oil by solid acid catalyst

In this work,biodiesel was obtained by the transesterification of jatropha oil with higher free fatty acids,using SO2-4/ TiO2-Al2O3 as a solid acid catalyst instead of traditional liquid acid and alkali catalysts.The effects of mixing speed,solid acid catalyst dosage,methanol/oil molar ratio,reaction temperature,co-solvent on the reaction were studied. The experimental results indicate that the solid acid catalyst of SO2-4/ TiO2-Al2O3 had a higher reactivity and stability on the transesterification of jatro...