| Effect of Fe2O3 Loading Amount on Catalytic Properties of Monolithic Fe2O3/Ce0.67Zr0.33O2 -Al2O3 Catalyst for Methane Combustion |
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| 作者姓名： | 刘志敏 陈耀强 钟俊波 王健礼 闫生辉 龚茂初 |
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| 作者单位： | College of Chemistry, Sichuan University, Sichuan 610064, China |
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| 基金项目： | Project supported by the National Natural Science Key Foundation of China （20333030） |
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| 摘 要： | 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.
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| 关 键 词： | 氧化铈 晶体 化学特性 催化剂 |
| 文章编号： | 1002-0721（2007）05-0585-05 |
| 收稿时间： | 30 December 2006 |
| 修稿时间： | 2006-12-30 |
Effect of Fe2 O3 Loading Amount on Catalytic Properties of Monolithic Fe2O3 /Ce0.67Zr0.33O2 -Al2O3 Catalyst for Methane Combustion |
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| Liu , Chen Yaoqiang, Zhong Junbo, Wang Jianli, Yan Shenghui,Gong Maochu,.Effect of Fe2O3 Loading Amount on Catalytic Properties of Monolithic Fe2O3/Ce0.67Zr0.33O2 -Al2O3 Catalyst for Methane Combustion[J].Journal of Rare Earths,2007,25(5):585-589. |
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| Authors: | Liu Chen Yaoqiang Zhong Junbo Wang Jianli Yan Shenghui Gong Maochu |
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| Affiliation: | College of Chemistry, Sichuan University, Sichuan 610064, China |
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| Abstract: | 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 Ce0.67Zr0.33O2-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 Fe2O3 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. |
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| Keywords: | Ce0 67Zr0 33O2-Al2O3 Fe2O3-based monolithic catalyst catalytic methane combustion catalytic properties |
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