Double perovskite anti-supported rare earth oxide catalyst CeO2/La2CoFeO6 for efficient ventilation air methane combustion

• 作者: Xiaojiao Gao Zehua Jin Ruisheng Hu Jia'nan Hu Yaqin Bai Pan Wang Jie Zhang Chunxiao Zhao
• 来源期刊: 稀土学报（英文版）
• 年，卷（期）: 2021,（4）
• 所属期刊栏目: RARE EARTH CATALYSIS
• 页码范围: 398-408
• 页数: 11页
• 语种: 英文

摘要

Ventilation air methane is one of available resources with a massive reserve.However,most of venti-lation air methane is discharged into the air and pollutes the environment.Catalysts with high tem-perature resistance(＞800 ℃)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 ℃,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 ℃,respectively.T10 and T90 of La2CoFeO6/CeO2 only reach 425.5 and 615.8 ℃.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