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公开(公告)号:US20170122175A1
公开(公告)日:2017-05-04
申请号:US15407819
申请日:2017-01-17
申请人: Cummins Inc.
发明人: Ashko Kumar , Krishna Kamasamudram , Jinyong Luo
IPC分类号: F01N3/28 , B01J35/04 , B01J35/00 , B01J29/076 , F01N3/10 , B01J23/22 , F01N3/035 , F01N13/00 , F01N3/20 , B01D53/94 , B01J29/072
CPC分类号: F01N3/2803 , B01D53/9418 , B01D53/9477 , B01D2255/20723 , B01D2255/20738 , B01D2255/20761 , B01D2255/50 , B01D2255/9032 , B01D2255/904 , B01D2255/911 , B01D2255/9155 , B01D2258/012 , B01J23/22 , B01J29/072 , B01J29/076 , B01J35/0006 , F01N3/035 , F01N3/106 , F01N3/2066 , F01N13/009 , F01N13/0097 , F01N2370/04 , F01N2510/063 , F01N2510/0682 , F01N2610/02 , Y02T10/24
摘要: Unique SCR catalyst including multiple washcoat formulations with differing performance characteristics are disclosed. One exemplary embodiment is an apparatus including a catalyst substrate defining a plurality of flow channels leading from an inlet to an outlet, a first washcoat composition distributed over a first portion of the flow channels, and a second washcoat composition distributed over a second portion of the flow channels. The first washcoat composition has a lower ammonia storage density than the second washcoat composition.