M0.5Co2.5O4(M=La,Ce,Pr,Nd)尖晶石型复合氧化物催化剂催化分解N2O性能  

Catalytic decomposition of N_2O on M_(0.5)Co_(2.5)O_4(M=La,Ce,Pr,Nd) spinel oxides catalysts

作　　者：李岩[1] 邹晓玲[1] 张舒恒 张相俊[1] 王虹[1] 李翠清[1] 宋永吉[1] Li Yan Zou Xiaoling Zhang Shuheng Zhang Xiangjun Wang Hong Li Cuiqing Song Yongji(Beijing Key Laboratory of Clean Fuel and Advanced Catalytic Pollution Reduction Technology, Department of Chemical Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China)

机构地区：[1]北京石油化工学院化学工程学院,燃料清洁化及高效催化减排技术北京市重点实验室,北京102617

出　　处：《工业催化》2017年第4期28-33,共6页Industrial Catalysis

基　　金：重质油国家重点实验室开放基金(SKLHOP201501);国家级大学生创新创业训练计划(2017J00022)

摘　　要：采用共沉淀法制备了M_(0.5)Co_(2.5)O_4(M=La,Ce,Pr,Nd)钴基尖晶石型复合氧化物催化剂,运用XRD、SEM、H_2-TPR和O_2-TPD-TG等对催化剂物化性能进行表征,并在固定床微型反应器中评价催化剂催化分解N_2O性能。结果表明,稀土金属掺杂改性的钴基尖晶石型复合氧化物催化剂粒径明显减小,比表面积增加,氧化还原性能得到改善,催化分解N_2O活性提高,其中,M_(0.5)Co_(2.5)O_4催化剂催化分解N2O温度低,T10和T95分别为342℃和499℃。A series of cobah-based spinel oxide catalysts M0. 5 Co2.5 O4 （ M = La, Ce, Pr, Nd） was prepared by coprecipitation method. The catalysts were characterized by XRD, SEM, H2-TPR and O2-TPD-TG. The activities of the catalysts for the direct catalytic decomposition of N2P were evaluated in a fixed bed micro- reactor. The results showed that the particle size of the cobalt-based spinel oxides modified by rare earth metals was reduced obviously and the surface area was increased compared with Co3O4. The redox per- formance was improved and their catalytic activity for N2O decomposition was enhanced. Among the as-prepared samples, the temperature of N2O catalytic decomposition on Nd0.5 Co2.5O4 catalyst was the lowest, Tlo and T95 were 342 ℃ and 499 ℃ , respectively.

关 键 词：催化化学 稀土金属 尖晶石 N2O催化分解 

分 类 号：O643.36[理学—物理化学] X51[理学—化学]