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制备了一系列Co掺杂的CeO2-ZrO2固溶体催化剂,考察了其用于甲烷催化燃烧的反应性能.同时,对反应气体总空速、制备方法和焙烧温度等条件对催化剂反应性能的影响进行了研究.并对其进行了BET比表面、XRD等表征分析.结果表明:Ce-Zr-Co-O系列催化剂对于甲烷催化燃烧反应具有良好的活性和稳定性,Co的加入能显著提升催化活性,在Co加入量为x=5%(mol)时可得到最优的反应性能.反应气体总空速对催化剂反应活性的影响较大,空速降低,甲烷完全转化温度也随之降低.制备方法和焙烧温度是影响催化剂活性的重要因素,比表面和晶体结构变化导致催化剂具有不同的反应性能.催化剂具有良好的稳定性.
A series of Co-doped CeO2-ZrO2 solid solution catalysts were prepared and investigated for their catalytic performance for methane catalytic combustion. At the same time, the effects of total space velocity of the reaction gas, preparation method and calcination temperature on the catalytic performance of the catalysts were investigated The results show that the Ce-Zr-Co-O catalyst has good activity and stability for the catalytic combustion of methane, the addition of Co can significantly improve the catalytic activity, When the amount of Co added is x = 5% (mol), the best reaction performance can be obtained.The total space velocity of the reaction gas has great influence on the reactivity of the catalyst, the space velocity decreases, and the complete conversion temperature of methane also decreases. And calcination temperature are important factors that affect the activity of the catalyst. The catalyst has different reactivity due to the specific surface and crystal structure changes. The catalyst has good stability.