Oxidative diesel control catalyst
    1.
    发明授权
    Oxidative diesel control catalyst 失效
    氧化柴油控制催化剂

    公开(公告)号:US5371056A

    公开(公告)日:1994-12-06

    申请号:US49224

    申请日:1993-04-20

    摘要: An oxidative diesel control catalyst is disclosed which has a high conversion rate for hydrocarbons and carbon monoxide and an inhibited oxidation effect on nitrogen oxides and sulfur dioxides and which contains a monolithic catalyst element with throughflow passages of ceramic or metal coated with an activity-promoting dispersion coating of the fine-particle metal oxides aluminum oxide, titanium oxide, silicon oxide, zeolite or mixtures thereof as support of the catalytically active components, the active components being present in the form of platinum, palladium, rhodium and/or iridium doped with vanadium or in contact with an oxidic vanadium compound. The reduced oxidation effect on sulfur dioxide is obtained by virtue of the fact that the fine-particle metal oxides are surface-modified aluminum oxide, titanium oxide, silicon oxide, zeolite or mixtures thereof. The surface modification is a coating of the specific surface of the metal oxides with a layer of titanium dioxide or silicon dioxide of 1 to 5 monolayers.

    摘要翻译: 公开了一种氧化柴油控制催化剂,其对烃和一氧化碳具有高转化率,并且对氮氧化物和二氧化硫具有抑制的氧化作用,并且其含有整体式催化剂元件,其具有涂覆有活性促进分散体的陶瓷或金属的通流通道 作为催化活性组分的载体,细颗粒金属氧化物氧化铝,氧化钛,氧化硅,沸石或其混合物的涂覆,活性组分以铂,钯,铑和/或铱的形式掺入钒 或与氧化钒化合物接触。 由于细颗粒金属氧化物是表面改性的氧化铝,氧化钛,氧化硅,沸石或其混合物,所以对二氧化硫的氧化效果降低。 表面改性是金属氧化物的比表面的涂层,其具有1至5个单层的二氧化钛或二氧化硅层。