文献类型：期刊文献

英文题名：Ni-Ce-Al composite oxide catalysts synthesized by solution combustion method: Enhanced catalytic activity for CO methanation

作者：Zeng, Yan[1];Ma, Hongfang[1];Zhang, Haitao[1];Ying, Weiyong[1];Fang, Dingye[1]

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

年份：2015

卷号：162

起止页码：16

外文期刊名：FUEL

收录：;EI(收录号：20153801280038);WOS:【SCI-EXPANDED(收录号:WOS:000362452100003)】；

基金：This work is financially supported by the National Science and Technology Supporting Plan (2012AA050102).

语种：英文

外文关键词：Ni-Ce-Al composite oxides; CO methanation; Solution combustion method; Ce doping

摘要：Ce-incorporated Ni/c-Al2O3 catalysts, with Ce loadings from 0 wt% to 8 wt%, were prepared by solution combustion method (SCM) and evaluated for CO methanation. Compared with Ce-free Ni/c-Al2O3 catalyst, Ce-doped Ni/c-Al2O3 catalysts retained higher low-and high-temperature catalytic activity. The Ce-doped Ni/c-Al2O3 catalyst with Ce content of 6 wt% (Ni-6Ce) maintained 100% CO conversion and nearly 100% CH4 selectivity throughout the low-temperature activity test. It is revealed that the promotional effects of Ce species were possibly attributed to the high dispersion and the resultant small sized Ni particles, owing to the formation of Ni-Ce-Al composite oxides. Furthermore, Ce4+/Ce3+ redox couples in Ce-doped catalysts enriched electrons on Ni atoms, facilitating CO dissociation, and thus the conversion. Moreover, Ni-Ce-Al composite oxide catalysts retained better coke-resistant performance at water free condition, leading to higher catalytic activity at high-temperature reaction. (C) 2015 Elsevier Ltd. All rights reserved.