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    • 80. 发明申请
    • OXIDATION CATALYST
    • 氧化催化剂
    • US20100047143A1
    • 2010-02-25
    • US12499442
    • 2009-07-08
    • Uwe ENDRUSCHAT
    • Uwe ENDRUSCHAT
    • B01D53/94B01J23/10F01N3/10
    • B01D53/944B01D2255/206B01D2255/20707B01D2257/702B01J23/002B01J23/26B01J23/6522B01J35/04B01J37/03B01J2523/00F01N3/103F01N13/16F01N2330/06F01N2330/12Y02A50/2341B01J2523/3712B01J2523/47B01J2523/67B01J2523/31B01J2523/824
    • A catalyst for selective oxidation of hydrocarbons relative to carbon monoxide includes a mixed oxide based on the compound Ce0.1-0.5Ti0.2-0.8Cr0.1-0.5Ox, wherein x is (the total of the valences of the metals)/2. Preferably, the mixed oxide is fixed as a coating on a molded body or less than 0.5 wt. % precious metal is doped to the mixed oxide. Oxidizable exhaust-gas components are oxidized for exhaust-gas purification by a mixed oxide based on the compound Ce0.1-0.5Ti0.2-0.8Cr0.1-0.5Ox as the catalyst. Preferably, hydrocarbons are preferentially oxidized relative to carbon monoxides or nitrogen oxides. For producing an oxidation catalyst for internal combustion engines, a mixed oxide made of cerium oxide, titanium oxide, chromium oxide, and optionally other metal oxides is fixed to a metallic or oxide or carbide, high temperature-stable molded body or an oxide ceramic, wherein the oxide ceramic is fixed to a molded body. Preferably, here the molded body is a wire mesh or a honeycomb structure, or the oxide ceramic on which the mixed oxide is fixed is a wash coat. Within a combustion chamber and an exhaust-gas pipe or exhaust-gas return pipe connected to this combustion chamber, a mixed oxide is fixed based on cerium oxide, titanium oxide, and chromium oxide as an oxidation catalyst.
    • 相对于一氧化碳选择性氧化烃的催化剂包括基于化合物Ce0.1-0.5Ti0.2-0.8Cr0.1-0.5Ox的混合氧化物,其中x是(金属价态的总和)/ 2。 优选地,将混合氧化物作为涂层固定在成型体上或小于0.5wt。 贵重金属被掺杂到混合氧化物中。 基于化合物Ce0.1-0.5Ti0.2-0.8Cr0.1-0.5Ox作为催化剂,通过混合氧化物氧化可氧化废气组分进行废气净化。 烃优选相对于一氧化碳或氮氧化物被优先氧化。 为了制造用于内燃机的氧化催化剂,将由氧化铈,氧化钛,氧化铬和任选的其它金属氧化物制成的混合氧化物固定在金属或氧化物或碳化物,高温稳定成型体或氧化物陶瓷上, 其中所述氧化物陶瓷固定在成形体上。 优选地,成型体是金属丝网或蜂窝结构体,或其上固定有混合氧化物的氧化物陶瓷是洗涂层。 在与该燃烧室连接的燃烧室和排气管或排气回流管内,作为氧化催化剂,以氧化铈,氧化钛,氧化铬为固定的混合氧化物。