Method and apparatus for coating a carrier

    公开(公告)号:US10441949B2

    公开(公告)日:2019-10-15

    申请号:US10553359

    申请日:2004-04-16

    摘要: This invention relates to a method and a corresponding apparatus for coating open-pored bodies with at least one coating suspension. In particular, the coating suspension has solids and solutes in a liquid medium in a quantity in wet state which is to correspond to at least a required target quantity. The coating operation has a variation in the applied wet coating quantity from one body to the other. The method according to the invention is characterized by the steps of: coating the body with an actual quantity of the coating suspension, which is always larger than the required target quantity taking the variation of the coating operation into account, determining the difference between the actual quantity and the required target quantity, and reducing the difference between actual quantity and target quantity by removing still wet coating suspension.

    Catalytic Soot Filter and Use Thereof in Treatment of Lean Exhaust Gases
    58.
    发明申请
    Catalytic Soot Filter and Use Thereof in Treatment of Lean Exhaust Gases 审中-公开
    催化烟尘过滤器及其在精益排气中的应用

    公开(公告)号:US20090285736A1

    公开(公告)日:2009-11-19

    申请号:US12465141

    申请日:2009-05-13

    IPC分类号: B01D53/94 B01D50/00

    摘要: The invention provides a process for reducing the amounts of carbon monoxide, hydrocarbons and soot particles in the lean exhaust gas from an internal combustion engine using a particle filter, wherein the soot particles have a soot ignition temperature TZ and the particle filter is regenerated from time to time by raising the temperature of the particle filter to above the soot ignition temperature and burning the soot particles, wherein the temperature of the filter is increased to the temperature required to initiate soot ignition by burning additional fuel on the catalytic coating when the exhaust gas back pressure reaches a predetermined value. The process is characterised in that the particle filter is provided with a catalytic coating comprising a first group of components for reducing the ignition temperature of soot, said first group of components contains at least one oxygen storage component and at least one platinum group metal selected from the group consisting of platinum, palladium and rhodium. In a preferred embodiment of the process the catalytic coating further comprises a second group of components for oxidising carbon monoxide and hydrocarbons, said second group of components comprises at least a support material selected from the group consisting of aluminium oxide, silicon oxide, titanium oxide, zirconium oxide and zeolite and at least one platinum group metal selected from the group consisting of platinum, palladium and rhodium deposited on said support materials.

    摘要翻译: 本发明提供了一种减少来自使用颗粒过滤器的内燃机的贫废气中的一氧化碳,碳氢化合物和烟灰颗粒的量的方法,其中烟灰颗粒具有烟灰着火温度TZ,并且颗粒过滤器从时间再生 通过将颗粒过滤器的温度升高到烟炱点燃温度以上并燃烧烟灰颗粒,其中过滤器的温度通过在催化涂层上燃烧附加燃料而增加到启动烟灰点火所需的温度 背压达到预定值。 该方法的特征在于,颗粒过滤器设置有包含用于降低烟灰的点燃温度的第一组成分的催化涂层,所述第一组组分含有至少一种储氧组分和至少一种选自以下的铂族金属: 由铂,钯和铑组成的组。 在该方法的优选实施方案中,催化涂层还包含用于氧化一氧化碳和烃的第二组组分,所述第二组组分至少包含选自氧化铝,氧化硅,氧化钛, 氧化锆和沸石以及选自沉积在所述载体材料上的铂,钯和铑中的至少一种铂族金属。