以TiO_2/γ-Al_2O_3/堇青石为载体的金属氧化物催化剂的应用研究  

Application Study of Different Metal Oxide Catalyst Supported on TiO_2/γ-Al_2O_3/Cordierite

作　　者：梁红[1] 于欣伟[1] 李树华[2] 林维明[1] 

机构地区：[1]广州大学化学化工学院,广州510006 [2]华南理工大学化工与能源工程学院,广州510640

出　　处：《化学反应工程与工艺》2006年第2期141-145,共5页Chemical Reaction Engineering and Technology

基　　金：2002年广东省科技计划项目(2002A3040304)

摘　　要：以Ti O2/γ-Al2O3/堇青石为复合载体,制备了以K,V,Cs,Sn,Pt等为活性组分的催化剂,催化剂于空气中在马弗炉700℃老化3 h。采用差示扫描量热(DSC)/热重(TG)测试方法确定催化剂的活性。实验结果表明,添加Pt能降低颗粒物(PM)起燃温度,特别是对PM中石墨化固体组分(GSF)的消除有利。K和Cs对降低起燃温度及对PM中可溶性有机组分(SOF)的最大燃烧温度起作用,K对PM中GSF部分的去除比Cs要好。老化中催化活性降低是比表面积下降和活性组分挥发流失的共同结果。Catalytic oxidation traps seemed to be one of the best ways for removing diesel particu lates from the exhaust gases because of their simplicity, easy handing, high abatement efficiency and comparatively low cost. K, V, Cs, Sn, Pt were loaded on TiO2/γ-Al2O3/cordierite honeycomb for preparing catalysts. Then these catalysts were aged in air in oven at 700℃ for 3 h. Catalyst activity was checked by DSC/TG experiments. Pt catalysts could decrease diesel particulates ignition temperature, especially help to remove the solid part in diesel particulates. Both K and Cs could also decrease the ignition temperature. The aging process resulted in activity reducing. Reduction of activity was result from sintering of surface and lossing of activity comnonent.

关 键 词：TiO2/γ-Al2O3/堇青石 金属氧化物 催化剂 颗粒物 

分 类 号：O643.36[理学—物理化学] TQ426.96[理学—化学]