Diesel oxidation catalyst
    8.
    发明授权
    Diesel oxidation catalyst 有权
    柴油氧化催化剂

    公开(公告)号:US09011783B2

    公开(公告)日:2015-04-21

    申请号:US13503797

    申请日:2009-11-12

    摘要: The invention relates to a catalyst for purifying the exhaust gases from diesel engines, in particular an oxidation catalyst which is particularly well suited for the purification of exhaust gases from heavy goods vehicles when further exhaust gas purification units such as a particle filter and/or a nitrogen oxide reduction catalyst are installed downstream thereof. The catalyst contains two catalytically active coatings which have different compositions and of which only one is in direct contact with the outflowing exhaust gas. The coating (1) which is in direct contact with the outflowing exhaust gas is platinum-rich and contains a total amount of noble metal (platinum and palladium) which is greater than that in the coating (2) which is not in direct contact with the outflowing exhaust gas. The platinum-rich coating (1) displays an extremely high oxidizing power, in particular in the NO oxidation, while the coating (2) which is not in direct contact with the outflowing exhaust gas ensures a good “heat-up performance” of the catalyst.

    摘要翻译: 本发明涉及一种用于净化来自柴油发动机的废气的催化剂,特别是一种氧化催化剂,其特别适用于净化来自重型货车的废气的废气,当进一步的废气净化装置如颗粒过滤器和/或 氮氧化物还原催化剂安装在其下游。 催化剂含有两种具有不同组成的催化活性涂层,其中只有一种与流出的废气直接接触。 与流出废气直接接触的涂层(1)是富含铂的,并且含有比不与直接接触的涂层(2)中的贵金属(铂和钯)的总量相同的总量 流出的废气。 富含铂的涂层(1)显示出非常高的氧化能力,特别是在NO氧化中,而不与流出废气直接接触的涂层(2)确保了良好的“加热性能” 催化剂。

    DIESEL OXIDATION CATALYST
    10.
    发明申请
    DIESEL OXIDATION CATALYST 有权
    柴油氧化催化剂

    公开(公告)号:US20120213674A1

    公开(公告)日:2012-08-23

    申请号:US13503797

    申请日:2009-11-12

    摘要: The invention relates to a catalyst for purifying the exhaust gases from diesel engines, in particular an oxidation catalyst which is particularly well suited for the purification of exhaust gases from heavy goods vehicles when further exhaust gas purification units such as a particle filter and/or a nitrogen oxide reduction catalyst are installed downstream thereof. The catalyst contains two catalytically active coatings which have different compositions and of which only one is in direct contact with the outflowing exhaust gas. The coating (1) which is in direct contact with the outflowing exhaust gas is platinum-rich and contains a total amount of noble metal (platinum and palladium) which is greater than that in the coating (2) which is not in direct contact with the outflowing exhaust gas. The platinum-rich coating (1) displays an extremely high oxidizing power, in particular in the NO oxidation, while the coating (2) which is not in direct contact with the outflowing exhaust gas ensures a good “heat-up performance” of the catalyst.

    摘要翻译: 本发明涉及一种用于净化来自柴油发动机的废气的催化剂,特别是一种氧化催化剂,其特别适用于净化来自重型货车的废气的废气,当进一步的废气净化装置如颗粒过滤器和/或 氮氧化物还原催化剂安装在其下游。 催化剂含有两种具有不同组成的催化活性涂层,其中只有一种与流出的废气直接接触。 与流出废气直接接触的涂层(1)是富含铂的,并且含有比不与直接接触的涂层(2)中的贵金属(铂和钯)的总量相同的总量 流出的废气。 富含铂的涂层(1)显示出非常高的氧化能力,特别是在NO氧化中,而不与流出废气直接接触的涂层(2)确保了良好的“加热性能” 催化剂。