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Ce-Zr-La-Al2O3的制备及负载的单Pd三效催化剂
引用本文:蔡黎,赵明,皮展,龚茂初,陈耀强.Ce-Zr-La-Al2O3的制备及负载的单Pd三效催化剂[J].催化学报,2008,29(2):108-112.
作者姓名:蔡黎  赵明  皮展  龚茂初  陈耀强
作者单位:四川大学化学学院,四川成都,610064
基金项目:国家自然科学基金(20333030),国家高技术研究发展计划(863计划,2007AA06Z347)
摘    要:采用共沉淀和浸渍两种方法制备了Ce-Zr-La-Al2O3(CZLA),对其进行了N2吸附和X射线衍射分析.以CZLA为载体制备了2%Pd/CZLA三效催化剂,并对催化剂进行了程序升温还原和活性测试.结果表明,两种方法制备的CZLA均具有较好的结构、织构和储氧性能,共沉淀法制备的CZLA具有更好的抗老化性能.以CZLA为载体所制备的单Pd三效催化剂表现出低的起燃温度、优异的三效性能,特别是优异的转化NO性能及抗老化性能.

关 键 词:      氧化铝    三效催化剂  反应温度  抗老化性能
文章编号:0253-9837(2008)02-0108-05
收稿时间:2007-07-11
修稿时间:2007年7月11日

Preparation of Ce-Zr-La-Al2O3 and Supported Single Palladium Three-Way Catalysts
CAI Li,ZHAO Ming,PI Zhan,GONG Maochu,CHEN Yaoqiang.Preparation of Ce-Zr-La-Al2O3 and Supported Single Palladium Three-Way Catalysts[J].Chinese Journal of Catalysis,2008,29(2):108-112.
Authors:CAI Li  ZHAO Ming  PI Zhan  GONG Maochu  CHEN Yaoqiang
Abstract:Ce-Zr-La-Al2O3 (CZLA) was prepared by co-precipitation and incipient wet impregnation methods and characterized by N2 adsorption and X-ray diffraction. 2%Pd/CZLA catalysts were prepared and studied by temperature-programmed reduction and activity tests. The CZLA supports prepared by the two methods showed good structural,textural,and oxygen storage properties,and the CZLA prepared by co-precipitation was more resistant to aging. The single Pd catalysts showed low light-off temperature and high three-way catalytic activity,especially the excellent NO conversion and aging resistance.
Keywords:cerium  zirconium  lanthanum  alumina  palladium  three-way catalyst  reation temperature  aging resistance
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