催化学报

催化学报 ›› 2008, Vol. 29 ›› Issue (2): 108-112.

• 研究论文 • 上一篇    下一篇

Ce-Zr-La-Al2O3的制备及负载的单Pd三效催化剂

蔡黎,赵明,皮展,龚茂初,陈耀强   

  1. 四川大学化学学院, 四川成都 610064
  • 收稿日期:2008-02-25 出版日期:2008-02-25 发布日期:2012-01-15

Preparation of Ce-Zr-La-Al2O3 and Supported Single Palladium Three-Way Catalysts

CAI Li, ZHAO Ming, PI Zhan, GONG Maochu, CHEN Yaoqiang*   

  1. College of Chemistry, Sichuan University, Chengdu 610064, Sichuan, China
  • Received:2008-02-25 Online:2008-02-25 Published:2012-01-15

PDF

866

被引次数

111

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: 铈, 锆, 镧, 氧化铝, 钯, 三效催化剂, 反应温度, 抗老化性能

Abstract: Ce-Zr-La-Al2O3 (CZLA) was prepared by co-precipitation and incipient wet impregnation methods and characterized by N2 adsorption andX-raydiffraction. 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.

Key words: cerium, zirconium, lanthanum, alumina, palladium, three-way catalyst, reation temperature, aging resistance