摘要
制备了具有高性能的稀土储氧材料Ce0.45Zr0.45Y0.05La0.05O2和耐高温大比表面积材料La-Al2O3,并以此为基础制备了Pt-Rh型中偶压缩天然气汽车尾气净化催化剂.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型压缩天然气汽车上的测试结果表明该催化剂能够满足欧Ⅲ排放标准.
The Ce0.45 Zro.45 Yo.05 Lao.05 02 oxygen storage material and La-stabilized alumina （La-Al2O3） were prepared. After aging at 1 000 ℃ for 5 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 Ce0.45 Zr0.45 Y0.05 La0.05O2 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 JET- TA-MT CNG vehicle indicated that the prepared catalysts were capable of fulfilling Euro Ⅲ requirements.
出处
《催化学报》
SCIE
EI
CAS
CSCD
北大核心
2007年第5期401-403,共3页
基金
国家自然科学重点基金(20333030)
国家自然科学基金(20273043).
关键词
稀土储氧材料
镧稳定的氧化铝
压缩天然气
汽车尾气净化
中偶催化剂
整车实验
rear earth oxygen storage material
lanthanum-stabilized alumina
exhaust gas purification
condensed natural gas
medium-coupled catalyst
vehicle test
