- 专利标题: Ammonia slip catalyst designed to be first in an SCR system
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申请号: US16272002申请日: 2019-02-11
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公开(公告)号: US10807081B2公开(公告)日: 2020-10-20
- 发明人: Mikael Larsson , David Micallef
- 申请人: Johnson Matthey Public Limited Company
- 申请人地址: GB London
- 专利权人: Johnson Matthey Public Limited Company
- 当前专利权人: Johnson Matthey Public Limited Company
- 当前专利权人地址: GB London
- 主分类号: B01J23/42
- IPC分类号: B01J23/42 ; B01J23/44 ; B01J29/76 ; B01D53/94 ; B01J21/04 ; B01J35/00 ; B01J35/04
摘要:
Catalyst articles having an ammonia slip catalyst (ASC) comprising a blend of platinum on a support with low ammonia storage and a first SCR catalyst, and a second catalyst, such as a diesel oxidation catalyst, a diesel exotherm catalyst (DEC), a NOx absorber, a selective catalytic reduction/passive NOx adsorber (SCR/PNA), a cold-start catalyst (CSC) or a three-way catalyst (TWC) are disclosed. The catalyst articles can also contain one or two additional SCR catalysts. The catalysts can be present in one of various configurations. The catalytic articles are useful for selective catalytic reduction (SCR) of NOx in exhaust gases and in reducing the amount of ammonia slip. Methods of using the catalytic articles in an SCR process, where the amount of ammonia slip is reduced, are also described.
公开/授权文献
- US10518255B2 Ammonia slip catalyst designed to be first in an SCR system 公开/授权日:2019-12-31
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