催化学报

催化学报 ›› 2008, Vol. 29 ›› Issue (4): 316-318.

• 研究快讯 • 上一篇    下一篇

满足欧V排放标准的汽油车中偶催化剂

姚艳玲,史忠华,宋为聪,袁书华,龚茂初,陈耀强   

  1. 四川大学化学学院绿色化学与技术教育部重点实验室, 四川成都 610064
  • 收稿日期:2008-04-25 出版日期:2008-04-25 发布日期:2012-03-22

Medium-Coupled Catalysts that Meet the Euro V Emission Standard for Gasoline Vehicles

YAO Yanling, SHI Zhonghua*, SONG Weicong, YUAN Shuhua, GONG Maochu, CHEN Yaoqiang   

  1. Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, Sichuan, China
  • Received:2008-04-25 Online:2008-04-25 Published:2012-03-22

PDF

958

被引次数

24

摘要： 制备了具有高性能的稀土储氧材料Ce0.65Zr0.25Y0.07La0.03O1.95和镧稳定的氧化铝(La-Al2O3), 并以此为基础制备了Pt-Pd-Rh型中偶汽油车尾气净化催化剂. 老化前后的性能检测表明,稀土储氧材料具有较大的比表面积和优异的储氧性能,La-Al2O3也具有优越的织构性能和高的热稳定性. 催化剂对模拟尾气具有较高的催化活性和稳定性,在捷达-MT型汽油车上的测试结果表明,经该催化剂处理后的尾气排放能够满足欧Ⅴ排放标准.

关键词: 储氧材料, 镧稳定的氧化铝, 中偶催化剂, 整车实验

Abstract: The Ce0.65Zr0.25Y0.07La0.03O1.95oxygen storage material and La-stabilized alumina (La-Al2O3) were prepared. After aging at1000℃ for5 h, Ce0.65Zr0.25Y0.07La0.03O1.95maintains excellent textural and oxygen storage properties, and after calcination at 900 ℃ for4 h, La-Al2O3 has superior textural properties. Medium-coupled Pt-Pd-Rh monolithic catalysts were prepared by impregnating Ce0.65Zr0.25Y0.07La0.03O1.95and La-Al2O3 with Pt(NO3)2, Pd(NO3)2, and Rh(NO3)3 solutions and then washcoating on the cordierite honeycomb. The medium-coupled catalysts show high low-temperature activity and good thermal stability. The results from the emission test of a JETTA-MT vehicle show that the catalysts can meet EuroⅤ emission requirements.

Key words: oxygen storage material, lanthanum-stabilized alumina, medium-coupled catalyst, vehicle test