文献类型：期刊文献

英文题名：Esterification over rare earth oxide and alumina promoted SO₄^2-/ZrO₂

作者：Yu, G. X.[1,2];Zhou, X. L.[1];Li, C. L.[1];Chen, L. F.[3];Wang, J. A.[3]

机构：[1]E China Univ Sci & Technol, Sch Chem Engn, Shanghai 200237, Peoples R China;[2]Jianghan Univ, Sch Chem & Environm Engn, Wuhan 430056, Peoples R China;[3]Inst Politecn Nacl, ESIQIE, Mexico City 07738, DF, Mexico

年份：2009

卷号：148

期号：1-2

起止页码：169

外文期刊名：CATALYSIS TODAY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000271830100028)】；

基金：We would like to thank the financial support from the key international cooperative research projects by the National Ministry of Science and Technology, P.R. China (No. 2004CB720603).

语种：英文

外文关键词：Sulfated zirconia; Rare earth oxide; Alumina promotion; Ethanol; Acetic acid; Esterification; Deactivation

摘要：Solid superacid catalysts including SO42-/ZrO2 (SZ), rare earth (RE) oxide-promoted SZ and RE oxides together with alumina-promoted SZ were prepared. Their catalytic performances in the esterification reaction of ethanol and acetic acid were investigated. The textural property, crystalline phase and surface acidity of the prepared catalysts were characterized by using nitrogen adsorption-desorption isotherms, X-ray diffraction (XRD) and Fourier-transform infrared (FTIR) spectroscopy of pyridine adsorption techniques, respectively. Effects of the reaction time and catalyst reuse cycle as well as catalyst regeneration on the catalytic behaviors were studied. Experimental results showed that Yb2O3-Al2O3 promoted SZ (designated as SZAY) catalyst exhibited an optimal esterification performance; the Lewis acid sites with moderate and super strong strength could mainly be responsible for the esterification reaction; and doping both Yb2O3 and Al2O3 on SZ not only boosted the esterification activity but also alleviated catalyst deactivation resulted from the surface sulfur loss by solvation. (C) 2009 Elsevier B.V. All rights reserved.