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CH4/CO2重整制合成气Ni/CexZr1-xO2催化剂性能研究
Catalytic Performance of Ni/CexZr1-xO2 Catalysts for Carbon DioxideReforming of Methane
【摘要】 以水热法合成的介孔铈锆固溶体为载体,采用浸渍法制备了Ni/CexZr1-xO2催化剂,使用X射线衍射(XRD)、程序升温还原(TPR)和热重-差示扫描量热分析(TG-DSC)等测试手段对催化剂进行了表征。通过对比以ZrO2,CeO2,Ce0.6Zr0.4O2和Ce0.33Zr0.67O2为载体的Ni基催化剂性能,发现铈锆固溶体独特的氧化还原性质可以提高活性组分的分散度,增强催化剂的抗积炭性能,从而提高催化剂对甲烷二氧化碳重整制合成气的选择性。
【Abstract】 The Ni/CexZr1-xO2 catalysts,whose support CexZr1-xO2 was made by hydrothermal synthesis,were prepared via the impregnation,and characterized by X-ray diffraction(XRD),temperature-programmed reduction(TPR) and thermal analysis(TG-DSC) techniques.By comparison of the catalytic performance of the Ni catalysts supported on ZrO2,CeO2,Ce0.6Zr0.4O2 and Ce0.33Zr0.67O2,it was found that the unique redox property of the ceria-zirconia solid solution could enhance the dispersion of active components,raise the anti-coking behavior,and accordingly improve the selectivity for synthesis gas from the CH4/CO2 reforming reaction over the catalysts.
【Key words】 CH4/CO2 reforming； ceria-zirconia solid solution； nickel catalyst； carbon deposition； rare earths；
- 【文献出处】 中国稀土学报 ,Journal of the Chinese Society of Rare Earths , 编辑部邮箱 ,2011年04期
- 【分类号】TE665.3
- 【被引频次】15
- 【下载频次】305