文献类型：期刊文献

英文题名：Application of porous anodic alumina monolith catalyst in steam reforming of dimethyl ether: Cu/γ-Al2O3/Al catalyst degradation behaviors and catalytic activity improvement by pre-competition impregnation method

作者：Zhang, Qi[1];Xu, Junjie[1];Fan, Feiyue[1];Sun, Dongmei[1];Xu, Guomin[2];Zhang, Sai[1];Zhu, Zibin[1]

机构：[1]E China Univ Sci & Technol, Dept Chem Engn, Shanghai 200237, Peoples R China;[2]Auburn Univ, Dept Chem Engn, Auburn, AL 36830 USA

年份：2014

卷号：119

起止页码：52

外文期刊名：FUEL PROCESSING TECHNOLOGY

收录：;EI(收录号：20134917045294);WOS:【SCI-EXPANDED(收录号:WOS:000330145000006)】；

基金：This work was financially supported by the National Natural Science Foundation of China (grant no. 20906023), sponsored by Shanghai Rising-Star Program (B type), the Foundation of Ministry of Education of China for Returned Scholars, and the Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：Anodic alumina; DME steam reforming; Copper degradation; Pre-competitive impregnation

摘要：A novel plate type anodic alumina supported Cu composite catalyst was developed to catalyze dimethyl ether steam reforming (DME SR) for hydrogen production. The degradation behaviors of the Cu/gamma-Al2O3/Al catalyst during DME SR were systematically studied. It is demonstrated that the catalyst was subjected to deactivation above 350 degrees C mainly due to the copper sintering. The selectivity of by-product CO is found to be very sensitive to the copper grain size. The aggregation of copper resulting in bigger copper grains will favor the reverse water gas shift reaction (r-WGS), which can be an efficient indicator to monitor the catalyst sintering process. A novel pre-competitive impregnation method was used to improve the composite catalyst. The catalyst's BET surface was significantly increased and the metal dispersion was improved via this method. The catalyst exhibited high activity and stability in DME SR even above 375 degrees C. A mechanism of this competitive impregnation was also proposed. C) 2013 Elsevier B.V. All rights reserved.