Chinese Journal of Catalysis

Chinese Journal of Catalysis ›› 2007, Vol. 28 ›› Issue (5): 401-403.

• Articles • Previous Articles     Next Articles

Medium-Coupled Catalysts Meeting Euro Ⅲ Emission Standards for Condensed Natural Gas Vehicles

YUAN Shuhua1, WANG Yongjun2, 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:2007-05-25 Online:2007-05-25 Published:2011-04-28

PDF (PC)

1069

Cited

14

Abstract: The Ce0.45Zr0.45Y0.05La0.05O2 oxygen storage material and La-stabilized alumina (La-Al2O3) were prepared. After aging at1000℃ for5 h, Ce0.45Zr0.45Y0.05La0.05O2 maintains superior textual and oxygen storage properties, and La-Al2O3 shows superior textual properties. Medium-coupled Pt-Rh monolithic catalysts for condensed natural gas (CNG) vehicles were prepared by impregnating Ce0.45Zr0.45Y0.05La0.05O2 and La-Al2O3 with H2PtCl6 and RhCl3 solutions and then washcoated on the cordierite honeycomb. The medium-coupled catalysts showed high activity at low temperature and thermal stability. The results from the emission test of JETTA-MT CNG vehicle indicated that the prepared catalysts were capable of fulfilling Euro Ⅲ requirements.

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