In situ synthesis and characterization of Ca–Mg–Al hydrotalcite on ceramic membrane for biodiesel production  

陶瓷膜表面Ca-Mg-Al水滑石的原位合成与表征及其在生物柴油制备中的应用（英文）

作　　者：徐威 高李璟 姜枫 肖国民 

机构地区：[1]School of Chemistry and Chemical Engineering, Southeast University

出　　处：《Chinese Journal of Chemical Engineering》2015年第6期1035-1040,共6页中国化学工程学报（英文版）

基　　金：Supported by the National Natural Science Foundation of China(21276050 and21406034);the National Basic Research Program of China(2010CB732206)

摘　　要：In situ surface synthesis of Ca–Mg–Al hydrotalcite(HT) on inorganic ceramic membrane(CM) was investigated with urea as precipitator. The effects of molar ratio of raw materials, crystallization time, and temperature on surface synthesis of HT were examined. The as-prepared HT/CM samples were characterized by XRD and SEM and an in situ growth mechanism of HT on CM was proposed. KF/HT/CM obtained by loading potassium fluoride(KF) on the HT layer by impregnation and calcination method was used as catalyst for transesterification between palm oil and methanol. The comparison of KF/HT/CM and pure KF/HT powder under identical reaction conditions shows that the production of fatty acid methyl ester is equivalent, which means that the use of inorganic catalytic membrane in the transesterification is a viable alternative.In situ surface synthesis of Ca–Mg–Al hydrotalcite（HT） on inorganic ceramic membrane（CM） was investigated with urea as precipitator. The effects of molar ratio of raw materials, crystallization time, and temperature on surface synthesis of HT were examined. The as-prepared HT/CM samples were characterized by XRD and SEM and an in situ growth mechanism of HT on CM was proposed. KF/HT/CM obtained by loading potassium fluoride（KF） on the HT layer by impregnation and calcination method was used as catalyst for transesterification between palm oil and methanol. The comparison of KF/HT/CM and pure KF/HT powder under identical reaction conditions shows that the production of fatty acid methyl ester is equivalent, which means that the use of inorganic catalytic membrane in the transesterification is a viable alternative.

关 键 词：Hydrotalcite coating In situ synthesis Ceramic membrane BIODIESEL TRANSESTERIFICATION 

分 类 号：O611.4[理学—无机化学] TE667[理学—化学]