文献类型：期刊文献

英文题名：Catalytic dehydration of methanol to dimethyl ether over modified γ-Al₂O₃ catalyst

作者：Liu, Dianhua[1,2];Yao, Chunfeng[1,2];Zhang, Jianqiang[1,2];Fang, Dingye[1,2];Chen, Dasheng[3]

机构：[1]E China Univ Sci & Technol, Engn Res Ctr Large Scale Reactor Engn & Technol, Minist Educ, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[3]Shanghai Wujing Chem Co Ltd, Shanghai 200241, Peoples R China

年份：2011

卷号：90

期号：5

起止页码：1738

外文期刊名：FUEL

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000288243100005)】；

基金：Financial support provided by China National Key Technology R&D Program (2007BAA08B04) is gratefully acknowledged.

语种：英文

外文关键词：Methanol; Dimethyl ether; Catalyst

摘要：A gamma-Al2O3 catalyst was modified with metal oxide (Nb2O5) in order to improve its activity and stability for dimethyl ether (DME) synthesis from methanol. A series of modified gamma-Al2O3 catalysts were prepared with Nb2O5 and characterized by X-ray diffraction and temperature programmed desorption of ammonia. Results showed that the gamma-Al2O3 catalyst containing 10 wt.% of Nb2O5 exhibited the highest surface area among the modified ones. The number of acid sites of the modified catalysts was increased by the Nb2O5 modification. In the chemical reaction of DME synthesis, it was found that the Nb2O5 modified gamma-Al2O3 catalyst exhibited a higher activity in the low temperature region (240 degrees C-260 degrees C) and a higher activity than did the untreated gamma-Al2O3 catalyst. (C) 2011 Elsevier Ltd. All rights reserved.