SINGLE BRICK SCR/ASC/PNA/DOC CLOSE-COUPLED CATALYST

    公开(公告)号:US20190001268A1

    公开(公告)日:2019-01-03

    申请号:US15939369

    申请日:2018-03-29

    IPC分类号: B01D53/94

    摘要: A catalyst article including a substrate with an inlet side and an outlet side, a first zone and a second zone, where the first zone includes a passive NOx adsorber (PNA), and an ammonia slip catalyst (ASC) comprising a platinum group metal on a support and a first SCR catalyst; where the second zone includes a catalyst selected from the group consisting of a diesel oxidation catalyst (DOC) and a diesel exotherm catalyst (DEC); and where the first zone is located upstream of the second zone. The first zone may include a bottom layer with a blend of: (1) the platinum group metal on a support and (2) the first SCR catalyst; and a top layer with a second SCR catalyst, the top layer located over the bottom layer.