HONEYCOMB FILTERS FOR REDUCING NOx AND PARTICULATE MATTER IN DIESEL ENGINE EXHAUST
    9.
    发明申请
    HONEYCOMB FILTERS FOR REDUCING NOx AND PARTICULATE MATTER IN DIESEL ENGINE EXHAUST 有权
    用于减少柴油发动机废气中的NOx和颗粒物的蜂窝状过滤器

    公开(公告)号:US20120230881A1

    公开(公告)日:2012-09-13

    申请号:US13046275

    申请日:2011-03-11

    IPC分类号: B01J8/00 B29C47/26

    摘要: Particulate filters for reducing NOx and particulate matter in diesel exhaust and methods for forming the same are disclosed. In one embodiment, a particulate filter may include a honeycomb body with a plurality of channel walls extending from an inlet end to an outlet end. At least a first set of the channels are plugged proximate at least one of the inlet end or the outlet end. A filter zone may extend from the inlet end in an axial direction of the particulate filter. A DeNOx zone may be located downstream of the filter zone. The channel walls of the particulate filter may include a DeNOx functional catalyst in the DeNOx zone and a ratio of the permeability κfz of the channel walls in the filter zone to the permeability κDz of the channel walls in the DeNOx zone (κfz:κDz) is at least 2.

    摘要翻译: 公开了用于减少柴油机废气中的NOx和颗粒物质的颗粒过滤器及其形成方法。 在一个实施例中,颗粒过滤器可以包括蜂窝体,其具有从入口端延伸到出口端的多个通道壁。 至少第一组通道在入口端或出口端中的至少一个处堵塞。 过滤区域可以从颗粒过滤器的轴向方向上的入口端延伸。 DeNOx区可以位于过滤区的下游。 颗粒过滤器的通道壁可以包括DeNOx区域中的DeNOx功能性催化剂,并且过滤区域中的通道壁的渗透率和kgr fz与DeNOx区域(&kgr)中的通道壁的渗透率&kgr; Dz的比率 ; fz:&kgr; Dz)至少为2。