发明名称 |
AGING-RESISTANT CATALYST ARTICLE FOR INTERNAL COMBUSTION ENGINES |
摘要 |
<p>Catalyst articles comprising palladium and related methods of preparation and use are disclosed. Disclosed is a catalyst article comprising a first catalytic layer formed on a substrate, wherein the first catalytic layer comprises palladium impregnated on a ceria-free oxygen storage component and platinum impregnated on a refractory metal oxide, and a second catalytic layer formed on the first catalytic layer comprising platinum impregnated on an oxygen storage component and rhodium impregnated on a zirconia-coated or yttria-coated alumina. The palladium component of the catalyst article is present in a higher proportion relative to the other platinum group metal components. The catalyst articles provide improved reductions in NOx in exhaust gases, particularly after lean-rich aging.</p> |
申请公布号 |
EP2398586(A4) |
申请公布日期 |
2012.11.14 |
申请号 |
EP20100744333 |
申请日期 |
2010.02.19 |
申请人 |
BASF CORPORATION |
发明人 |
LIU, XINSHENG;LIU, YE;TRAN, PASCALINE, HARRISON;GALLIGAN, MICHAEL, P.;LIN, WENYONG;KESHAVARAJA, ALIVE |
分类号 |
B01J23/63;B01D53/94;B01J23/40;B01J35/04;B01J37/02;B01J37/025 |
主分类号 |
B01J23/63 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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