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

✍ Scribed by Shuhua YUAN; Yongjun WANG; Zhonghua SHI; Ming ZHAO; Maochu GONG; Zhongchang LIU; Qizhang CHEN; Yaoqiang CHEN

• Book ID: 104452731
• Publisher: Elsevier Science
• Year: 2007
• Weight: 287 KB
• Volume: 28
• Category: Article
• ISSN: 1872-2067
• DOI: 10.1016/s1872-2067(07)60036-9

✦ Synopsis

The Ce 0.45 Zr 0.45 Y 0.05 La 0.05 O 2 oxygen storage material and La-stabilized alumina (La-Al 2 O 3 ) were prepared. After aging at 1000ºC for 5 h, Ce 0.45 Zr 0.45 Y 0.05 La 0.05 O 2 maintains superior textual and oxygen storage properties, and La-Al 2 O 3 has superior textual properties. Medium-coupled Pt-Rh monolithic catalysts for CNG vehicles were prepared by impregnating Ce 0.45 Zr 0.45 Y 0.05 La 0.05 O 2 and La-Al 2 O 3 with H 2 PtCl 6 and RhCl 3 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 a JETTA-MT CNG vehicle indicated that the prepared catalysts were capable of fulfilling Euro III requirements.