Abstract
Ventilation air methane is one of available resources with a massive reserve. However, most of ventilation air methane is discharged into the air and pollutes the environment. Catalysts with high temperature resistance (>800 °C) for ventilation air methane are very essential for utilization of the ventilation air methane. We mainly prepared catalysts CeO2/La2CoFeO6 and La2CoFeO6/CeO2 and comparative samples CeO2 and La2CoFeO6 by the simple sol-gel method and calcined them under 900 °C, and tested the catalytic performance of ventilation air methane combustion under the condition of 5 vol% H2O. The experimental results show that the light-off temperature (T10) and complete combustion temperature (T90) of the ventilation air methane combustion reaction of CeO2/La2CoFeO6 catalyst are 417.4 and 587.7 °C, respectively. T10 and T90 of La2CoFeO6/CeO2 only reach 425.5 and 615.8 °C. The T10 and T90 of CeO2/La2CoFeO6 are 417.4 and 587.7 ℃, which are lower than those of La2CoFeO6 (T10 = 452.4 ℃ and T90 = 673.0 ℃) and La2CoFeO6/CeO2 (T10 = 425.5 ℃ and T90 = 615.8 ℃). Therefore, the catalytic performance of the anti-supported rare earth oxide catalyst CeO2/La2CoFeO6 is better than that of La2CoFeO6 and supported catalyst La2CoFeO6/CeO2.
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