Effect of CeO_2 preparation method and Cu loading on CuO/CeO_2 catalysts for methane combustion

查看全文 作　　者：Weiling Yang Dao Li Dongmei Xu Xingyi [1]Wang

机构地区：[1]Key Laboratory for Advanced Materials, Research Institute of Industrial Catalysis, East China University of Science and Technology, Shanghai 200237, China

出　　处：《Journal of Natural Gas Chemistry》索引2009年第18卷第4期,共9页

基　　金：Supported by the Commission of Science and Technology of Shanghai Municipality (No. 0852nm00900) 摘　　要：CeO2 was synthesized by sol-gel,hydrothermal,nitrate thermal decomposition methods,respectively,and used as support to prepare CuO/CeO2 catalysts. According to characterization and reaction results,preparation method of CeO2 had a great influence on the physicochemical properties and activities of CuO/CeO2 catalysts. CuO with high dispersion and strong interaction with CeO2 was highly active in methane combustion,while CuO particles less associated with CeO2 showed less activity. The CuO catalyst supported on CeO2 which was prepared via nitrate thermal decomposition method showed the largest area,the smallest particle size,the highest dispersion of copper species and strong support metal interactions. Therefore,it presented the highest redox ability and activity for methane combustion. Activities of the catalysts with different copper content kept increasing until 5% Cu loading and from then on kept constant. Moreover,methane conversion decreased as methane space velocities increased on CuO/CeO2 catalyst. Addition of CO2 to the feed did not produce a significant effect on the catalytic activity,but the presence of H2O provoked a remarkable decrease on the activity of CuO/CeO2 catalyst. 关键词：氧化铜催化剂甲烷燃烧氧化铈铜颗粒制备方法催化剂活性强相互作用氧化还原能力

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Effect of CeO_2 preparation method and Cu loading on CuO/CeO_2 catalysts for methane combustion

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