Abstract Ventilation air methane is one of available resources with a massive reserve. However, most of ventilation air methane are discharged into the air and pollute the environment. Catalysts with high temperature resistance (>800 °C) for ventilation air methane is very essential to 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 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 °C and 587.7 °C, respectively. The T10 and T90 of La2CoFeO6/CeO2 only reach 425.5 °C and 615.8 °C. The T10 and T90 of La2CoFeO6/CeO2 are respectively 57.2 and 26.9 °C lower than La2CoFeO6, while the T10 and T90 of CeO2/La2CoFeO6 are respectively 85.3 and 35 °C lower than La2CoFeO6, which indicates that the anti-supported rare earth oxide catalyst CeO2/La2CoFeO6 is not only lower than catalyst La2CoFeO6 has the good catalytic performance of ventilation air methane combustion and is better than supported catalyst La2CoFeO6/CeO2.

中文翻译：

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双钙钛矿反负载稀土氧化物催化剂CeO2/La2CoFeO6用于高效通风空气甲烷燃烧

摘要 通风空气中的甲烷是一种储量巨大的可利用资源。然而，大部分通风空气中的甲烷排放到空气中并污染环境。用于通风空气甲烷的耐高温（>800°C）催化剂对于通风空气甲烷的利用非常重要。我们主要采用简单溶胶-凝胶法制备催化剂CeO2/La2CoFeO6和L​​a2CoFeO6/CeO2以及对比样品CeO2和La2CoFeO6，并在900℃下煅烧，并测试了5vol%H2O条件下通风空气甲烷燃烧的催化性能。实验结果表明，CeO2/La2CoFeO6催化剂通风甲烷燃烧反应的起燃温度（T10）和完全燃烧温度（T90）分别为417.4℃和587.7℃。La2CoFeO6/CeO2的T10和T90仅达到425.5℃和615.8℃。La2CoFeO6/CeO2的T10和T90分别比La2CoFeO6低57.2和26.9°C，而CeO2/La2CoFeO6的T10和T90分别比La2CoFeO6低85.3和35°C，表明反负载稀土氧化物催化剂CeO2/La2CoFeO6不仅低于催化剂La2CoFeO6具有良好的通风甲烷燃烧催化性能，而且优于负载型催化剂La2CoFeO6/CeO2。