燃料化学学报2016，Vol.44Issue(4)：422-427,6.
CaO-MgO@CoFe2 O4磁性固体碱的制备及其大豆油酯交换反应催化性能
Preparation of magnetic core-shell CaO-MgO@CoFe2O4 solid base and its catalytic performance in the transesterification of soybean oil to biodiesel
摘要
Abstract
A magnetic core-shell CaO-MgO@CoFe2 O4 solid base was prepared with oxalates as the precursor through a two-step method, which was used as the catalyst for the transesterification of soybean oil to biodiesel with methanol. The CaO-MgO@CoFe2 O4 catalyst was characterized by magnetic hysteresis loop, X-ray diffraction ( XRD) , CO2-TPD and transmission electron microscopy ( TEM ); the effects of core-shell molar ratio, catalyst calcination temperature, reaction temperature, reaction time, methanol/oil molar ratio and catalyst amount on the yield of biodiesel were investigated. The results indicated that over the CaO-MgO@CoFe2 O4 catalyst with a core-shell molar ratio of 1:6 and calcined at 700 ℃, the biodiesel yield reaches 97 . 1% after conducting the transesterification reaction at 65℃ for 3 h, when the methanol/oil mol ratio is 12 and the amount of catalyst is 1. 0% by mass. The catalyst exhibits excellent reusability; the biodiesel yield remains above 90%after reusing for four cycles.关键词
生物柴油/磁性固体碱催化剂/酯交换反应/大豆油/CaO-MgOCoFe2O4Key words
biodiesel/magnetic solid base catalyst/transesterification/soybean oil/CaO-MgOCoFe2 O4分类
化学化工引用本文复制引用
范明明,刘延磊,张萍波,蒋平平..CaO-MgO@CoFe2 O4磁性固体碱的制备及其大豆油酯交换反应催化性能[J].燃料化学学报,2016,44(4):422-427,6.基金项目
The project was supported by the National Natural Science Foundation of China (21306063) and the Natural Science Foundation of Jiangsu Province (BK20130123).@@@@国家自然科学基金(21306063)和江苏省自然科学基金(BK20130123)资助 （21306063）
