Chinese Journal of Catalysis

Chinese Journal of Catalysis ›› 2007, Vol. 28 ›› Issue (2): 97-99.

• Articles •     Next Articles

Medium-Coupled Catalysts Meeting Euro Ⅲ Emission Standards for Gasoline Vehicles

WANG Yongjun2, YUAN Shuhua1, SHI Zhonghua1, ZHAO Ming1, GONG Maochu1, LIU Zhongchang3, CHEN Qizhang4, CHEN Yaoqiang1*   

  1. 1 College of Chemistry, Sichuan University, Chengdu 610064, Sichuan, China; 2 FAW-VW Automobile Co., Ltd., Changchun 130011, Jilin, China; 3 Faculty of Automobile, Jilin University, Changchun 130025, Jilin, China; 4 Sichuan Zhongzi Exhaust Purification Company, Ltd., Chengdu 610046, Sichuan, China
  • Received:2007-02-25 Online:2007-02-25 Published:2011-01-28

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Abstract: The Ce0.5Zr0.4Y0.1O2 oxygen storage material and La-stabilized alumina (La-Al2O3) were prepared. After aging at 1000 ℃ for 5 h, Ce0.5Zr0.4Y0.1O2 maintains superior textual and oxygen storage properties, and La-Al2O3 has superior textual properties. Medium-coupled Pd-Rh monolithic catalysts were prepared by impregnating Ce0.5Zr0.4Y0.1O2 and La-Al2O3 with H2PtCl6 and RhCl3 solutions and then washcoated on the cordierite honeycomb. The medium-coupled catalysts show high low-temperature activity and thermal stability. The results from the emission test of JETTA-MT vehicle show to fulfill Euro Ⅲ requirements.

Key words: rear earth oxygen storage material, lanthanum-stabilized alumina, exhaust gas purification, medium-coupled catalyst, vehicle test