文献类型：期刊文献

英文题名：KF promoted mesoporous gamma-Al2O3 with strong basicity: Preparation, characterization and catalytic activitiy for transesterification to biodiesel

作者：Zheng, Xinyan[2];Fan, Weiming[2];Kong, Weiping[1];Wang, Yudan[1];Qi, Chenze[1]

机构：[1]Shaoxing Univ, Zhejiang Key Lab Alternat Technol Fine Chem Proc, Shaoxing 312000, Peoples R China;[2]Zhejiang Zhenyuan Pharmaceut Co LTD, Shaoxing 312000, Peoples R China

年份：2014

卷号：55

期号：5

起止页码：592

外文期刊名：KINETICS AND CATALYSIS

收录：SCI-EXPANDED(收录号：WOS:000342423300008)、、WOS

基金：This work was supported by the National Natural Science Foundation of China (21203122), Foundation of Science and Technology of Shaoxing Bureau (2012B70018) and Postdoctoral Foundation of China (2012M520062).

语种：英文

外文关键词：strong base; crystalline mesoporous gamma-Al2O3; biodiesel; hydrothermal synthesis; base catalysis

外文摘要：The present paper describes the preparation of KF/M-gamma-Al2O3, efficient mesoporous solid bases. The procedure involves loading KF into a crystalline mesoporous gamma-Al2O3 that was synthesized by the self-assembly of poly-4-vinylpyridine (P4VP) with Al3+ species. The synthesis is based on the strong acid-base interaction, hydrothermal treatment at 180A degrees C and calcination at 550A degrees C. Characterizations using XRD analysis and low temperature N-2 adsorption indicated that different amounts of KF could be introduced into crystalline mesoporous gamma-Al2O3 to obtain catalysts with high BET surface areas, large pore volumes and uniform pore size distribution. Based on SEM images, KF/M-gamma-Al2O3 catalysts have rough surface character and a large nanopore volume. CO2-TPD curves registered for KF/M-gamma-Al2O3 contain high temperature peaks, indicating strong basicity of the catalysts. Under the same reaction conditions KF/M-gamma-Al2O3 catalysts exhibit much better activities for transesterification to biodiesel than KOH, NaOH, H2SO4, hydrotalcite and CaO. Enhanced activities appear to arise from strong basisity and large BET surface areas.