储氧材料负载的钴基整体式催化剂的活性研究  

Catalytic activity of cobalt-based monolith catalysts supported on oxygen storage materials

作　　者：任屹罡[1] 龚茂初[2] 陈耀强[2] 

机构地区：[1]郑州轻工业学院材料与化学工程学院,河南省表界面科学重点实验室,河南郑州450002 [2]四川大学化学系,四川成都610064

出　　处：《环境污染与防治》2011年第11期6-9,14,共5页Environmental Pollution & Control

基　　金：国家自然科学基金资助项目(No.20273043)

摘　　要：以Ce-Zr-Mn三组分储氧材料(OSM)和Y2O3、ZrO2稳定的γ-Al2O3(YSZ-Al2O3)为载体,制得Co基催化剂,再以不同比例的Co/OSM和Co/YSZ-Al2O3制得堇青石为基体的Co基整体式催化剂。上述催化剂活性用甲烷催化燃烧性能进行评估。结果表明,甲烷燃烧催化活性顺序为Co/OSM≈Co/YSZ-Al2O3+OSM>Co/YSZ-Al2O3;Co在不同载体上的最佳负载量均为10%(质量分数);分别负载在YSZ-Al2O3与OSM之后再混合具有更佳活性,随着Co/OSM含量的升高,催化活性先上升再下降;新鲜样品中Co/OSM∶Co/YSZ-Al2O3质量比为50∶50时表现出最大活性;而经过1 000℃老化后,Co/YSZ-Al2O3∶Co/OSM质量比为25∶75的样品显现出最大活性。Ce-Zr-MnO2 （OSM） and YSZ-Al2O3 （Y2O3 , ZrO2 stabilized alumina） were applied as supporter to prepare cobalt-based catalysts （Co/OSM, Co/YSZ-Al2O3 and Co/OSM ＋ YSZ-Al2O3 ）. Series of monolith catalysts were prepared by compounding Co/OSM and Co/YSZ-Al2O3 with different proportion. The activity of these catalysts was evaluated in methane combustion. Result showed that the activity order of the catalysts was Co/OSM≈Co/ YSZ-Al2O3 ＋OSM〉Co/YSZ-Al2O3, The optimum Co loading content for these catalysts was all 10% （mass ratio）. The monolith catalysts Co/OSM＋ Co/YSZ-Al2O3 presented the better catalytic property, the methane combustion activity of the catalyst was increase first and then decreased with increasing the Co/OSM proportion, the maximum activity was observed when the Co/OSM ： Co/YSZ-Al2O3 ratio was 50 ： 50. However,after aged at high temperature,the maximum activity was observed when Co/YSZ-Al2O3 ： Co/OSM ratio was about 25 ： 75.

关 键 词：储氧材料 氧化钴 整体式催化剂 催化燃烧 

分 类 号：TQ426.81[化学工程]