Abstract
Ce 0.67Zr 0.33O 2-Al 2O 3 solid solution was prepared by the co-precipitation method. Fe 2O 3-based catalysts supported on the solid solution were obtained by the impregnation method. The article revealed that the optimal loading amount of Fe 2O 3 on Ce 0.67Zr 0.33O 2-Al 2O 3 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 Fe 2O 3 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 Fe 2O 3 was well dispersed on the Ce 0.67Zr 0.33O 2-Al 2O 3 matrix. The results of BET and TPR were in good harmony with the catalytic activity results.
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