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Effect of Fe_2O_3 Loading Amount on Catalytic Properties of Monolithic Fe_2O_3/Ce0.67Zr0.33O_2-Al_2O_3 Catalyst for Methane Combustion 认领 引用 被引量：4
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作者 刘志敏 陈耀强 +3 位作者 钟俊波 王健礼 闫生辉 龚茂初 《Journal of Rare Earths》 SCIE EI CAS 2007年第5期585-589,共5页
Ce0.67Zr0.33O2-Al2O3 solid solution was prepared by the co-precipitation method. Fe2O3-based catalysts supported on the solid solution were obtained by the impregnation method. The article revealed that the optimal lo... Ce0.67Zr0.33O2-Al2O3 solid solution was prepared by the co-precipitation method. Fe2O3-based catalysts supported on the solid solution were obtained by the impregnation method. The article revealed that the optimal loading amount of Fe2O3 on Ce0.67Zr0.33 O2-Al2O3 in our experimental condition for catalytic combustion of methane was 8% （ mass fraction）. The prepared catalysts were characterized by BET, TPR, XRD analyses, and their catalytic activity was investigated after being calcined at 873 K and after being aged in water gas at 1273 K. When the loading amount of Fe203 was 8% （ mass fraction）, the catalyst held the highest activity, and the best temperature speciality and thermal stability. The complete-conversion temperature of methane for fresh and aged sample was 788 and 838 K, respectively. The range between the light-off temperature and the complete-conversion temperature was only 15 K. The characterization results of XRD indicated that Fe2O3 was well dispersed on the Ce0.67Zr0.33O2-Al2O3 matrix. The results of BET and TPR were in good harmony with the catalytic activity results. 展开更多
关键词 Ce0.67Zr0.33O2 -Al2O3, Fe2O3-based monolithic catalyst catalytic methane combustion catalytic properties
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Steam effects over Pd/Ce0.67Zr0.33O_2-Al_2O_3 three-way catalyst 认领 引用 被引量：2
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作者 王建强 沈美庆 +3 位作者 王军 高继东 马杰 刘双喜 《Journal of Rare Earths》 SCIE EI CAS CSCD 2012年第8期748-752,共5页
Ceria-zirconia-alumina （CZA） solid solution was prepared by sol-gel method in the present study. 0.5 wt.% Pd supported on CZA was prepared by incipient wetness impregnation. The steam effects for CO and C3H8 oxidati... Ceria-zirconia-alumina （CZA） solid solution was prepared by sol-gel method in the present study. 0.5 wt.% Pd supported on CZA was prepared by incipient wetness impregnation. The steam effects for CO and C3H8 oxidation, three-way catalytic activity and stoichiometric window property were studied. The light-off temperature of the CO oxidation reaction shifted to a lower temperature due to the water-gas shift （WGS） reactions. The oxidation of C3H8 was enhanced due to the steam reforming （SR） reactions. The steam promoted the C3H8 oxidation and NO reduction in three-way catalytic reaction. The amplitude of stoichiometric window was amplified by the addition of water to the feed stream. 展开更多
关键词 Pd/Ce0.67Zr0.33O2-Al2O3 three-way catalytic activity water-gas shift steam reforming stoichiometric window rare earths
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