Co掺杂CeO_2-ZrO_2固溶体催化剂甲烷催化燃烧性能的研究  

Methane Catalytic Combustion over Cobalt Doped Cerium Zirconium Solid Solution

作　　者：杨建[1] 丑凌军[1] 赵军[1] 宋焕玲[1] 张兵[1] 李树本[1] 

机构地区：[1]中国科学院兰州化学物理研究所羰基合成与选择氧化国家重点实验室,甘肃兰州730000

出　　处：《分子催化》2011年第2期114-118,共5页Journal of Molecular Catalysis(China)

基　　金：国家重点基础研究发展计划(973计划)专项(2011CB201400)

摘　　要：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 cobalt doped Ce0.75-XZr0.25CoX solid solution catalysts were prepared.Its reaction property was investigated for the methane catalytic combustion.The structural characteristics were investigated using X-ray diffraction（XRD） and BET.The results shows that Ce-Zr-Co-O catalyst exhibited good activity and stability for methane catalytic combustion,the addition of cobalt enhanced the catalyst activity significantly and the optimal reaction property was obtained when the Co loading ratio 5 %（mol）.The GHSV affected the reaction activity more greatly.Methane full conversion temperature was decreased with GHSV was decreased.Ce-Zr-Co-O catalyst exhibits good stability and the reaction property was directly affected by specific surface and surface area.Furthmore,the influence of reaction condition for reaction property including preparation methods and calcination temperatures were investigated.

关 键 词：甲烷催化燃烧 CeO2-ZrO2固溶体 CO掺杂 制备条件 

分 类 号：O643.3[理学—物理化学]