Catalytic activated diesel particle filter with ammonia trap effect
AssigneeUmicore AG & Co. KG
InventorsMarcus Pfeifer, Markus Koegel, Wolfgang Schneider, Nicola Soeger, Katja Adelmann, Gerald Jeske, Thomas Kreuzer
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Abstract
A catalytically active diesel particulate filter with ammonia trap action is presented, which, in addition to an oxidation-active coating (2), comprises a coating (1) which is catalytically active in the SCR reaction. By means of this inventive diesel particulate filter, it is possible to make exhaust gas aftertreatment systems for removing nitrogen oxides and particulates from the exhaust gas of lean engines considerably simpler and less expensive.
Claims20
A catalytically active diesel particulate filter for treating exhaust gas comprising a filter body and comprising an oxidation-active catalytic coating layer, and a further coating layer which is catalytically active in the SCR reaction, in which an ammonia storage material is present, wherein an arrangement of layers is maintained such that the exhaust gas to be cleaned primarily passes through the coating layer which is catalytically active in the SCR reaction and subsequently through the oxidation-active catalytic coating layer.
Dependencies are inferred from the claim text.