发明名称 |
Exhaust system for a lean-burn internal combustion engine including scr catalyst |
摘要 |
<p>An exhaust system 20 for an internal combustion engine comprises a) a first catalysed substrate monolith 12 comprising a first washcoat coating disposed in a first washcoat zone 16 of the substrate monolith and a second washcoat coating disposed in a second washcoat zone 18 of the substrate monolith, wherein the first washcoat coating comprises a catalyst composition comprising at least one platinum group metal (PGM) and at least one support material, wherein at least one PGM in the first washcoat coating is liable to volatilise when the first washcoat coating is exposed to relatively extreme conditions including relatively high temperatures, wherein the second washcoat coating comprises at least one material supporting copper for trapping volatilised PGM and wherein the second washcoat coating is oriented to contact exhaust gas that has contacted the first washcoat; and b) a second catalysed substrate monolith 14 comprising a catalyst for selectively catalysing the reduction of oxides of nitrogen to dinitrogen with a nitrogenous reductant disposed downstream from the first catalysed substrate monolith.</p> |
申请公布号 |
GB2507441(B) |
申请公布日期 |
2015.05.20 |
申请号 |
GB20140002403 |
申请日期 |
2012.12.11 |
申请人 |
JOHNSON MATTHEY PUBLIC LIMITED COMPANY |
发明人 |
PHILIP GERALD BLAKEMAN;GAVIN MICHAEL BROWN;ANDREW FRANCIS CHIFFEY;JANE GAST;PAUL RICHARD PHILLIPS;RAJ RAO RAJARAM;GLEN SPREITZER;ANDREW WALKER |
分类号 |
F01N3/10;B01D53/94 |
主分类号 |
F01N3/10 |
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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