Catalyst construction for treating lean burn engine exhaust
    6.
    发明公开
    Catalyst construction for treating lean burn engine exhaust 审中-公开
    Konstruktion eines Katalysators zur Behandlung von Abgasen eines Magermotors

    公开(公告)号:EP1108865A2

    公开(公告)日:2001-06-20

    申请号:EP00310309.0

    申请日:2000-11-20

    IPC分类号: F01N3/28 F01N3/20

    摘要: An exhaust purification device for a fossil fuelled engine, comprising a series of alternately blocked laminar flow channels (42) defining inlet sections, cross-flow sections, and exit sections. The flow channels have porous (foraminous) walls (45) and a predetermined hydraulic diameter. The device also has a plurality of NO x reacting pellets (55) packing at least certain of the inlet sections of the channels (42); the pellets have a diameter generally approaching the hydraulic diameter and are comprised of at least dolomitic carbonate. The device has a three-way catalyst (i.e., selected Pd, Pt or Rh) coating (56) at least on the walls (45) of the outlet sections.

    摘要翻译: 一种用于化石燃料发动机的排气净化装置,包括限定入口部分,横流部分和出口部分的一系列交替阻挡的层流通道(42)。 流动通道具有多孔(有孔)壁(45)和预定的液压直径。 所述装置还具有填充通道(42)的至少某些入口部分的多个NOx反应颗粒(55)。 颗粒具有通常接近水力直径的直径并且由至少白云石碳酸盐组成。 该装置至少在出口部分的壁(45)上具有三向催化剂(即,选择的Pd,Pt或Rh)涂层(56)。