Effect of CeO2 addition on Ni/Al2O3 catalysts for methanation of carbon dioxide with hydrogen

被引：215

作者：

Liu, Hezhi ^{[1
]}

Zou, Xiujing ^{[1
]}

Wang, Xueguang ^{[1
]}

Lu, Xionggang ^{[1
]}

Ding, Weizhong ^{[1
]}

机构：

[1] Shanghai Univ, Shanghai Key Lab Modern Met & Mat Proc, Shanghai 200072, Peoples R China

来源：

JOURNAL OF NATURAL GAS CHEMISTRY | 2012年 / 21卷 / 06期

基金：

国家高技术研究发展计划(863计划);

关键词：

carbon dioxide; methanation; ceria; alumina; nickel catalyst; CO2; SURFACE; STEAM; CERIA; GAS; CAPTURE; METALS; RATIO; FE;

D O I：

10.1016/S1003-9953(11)60422-2

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The Ni-CeO2/Al2O3 catalysts with a nickel content of 15 wt% prepared via impregnating boehmite were found to be highly active and stable for methanation of carbon dioxide with hydrogen at a H-2/CO2 molar ratio of 4. The effects of CeO2 content and reaction temperature on the performance of the Ni-CeO2/Al2O3 catalysts were studied in detail. The results showed that the catalytic performance was strongly dependent on the CeO2 content in Ni-CeO2/Al2O3 catalysts and that the catalysts with 2 wt% CeO2 had the highest catalytic activity among the tested ones at 350 degrees C. The XRD and H-2-TPR characterizations revealed that the addition of CeO2 decreased the reduction temperature by altering the interaction between Ni and Al2O3, and improved the reducibility of the catalyst. Preliminary stability test of 120 h on stream over the Ni-2CeO(2)/Al2O3 catalyst at 350 degrees C revealed that the catalyst was much better than the unpromoted one.

引用

页码：703 / 707

页数：5

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