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    • 81. 发明授权
    • Catalyst composition for ultra high temperature operation
    • 用于超高温操作的催化剂组合物
    • US4585752A
    • 1986-04-29
    • US640874
    • 1984-08-15
    • Michael V. Ernest
    • Michael V. Ernest
    • B01J23/40B01J23/63B01J23/648B01J23/652B01J37/04F23D3/40
    • B01J23/648B01J23/40B01J23/63B01J23/6522B01J37/04
    • A high temperature stable catalyst is made with fine particles of a base metal such as chromium, hafnium and niobium or their oxides dispersed throughout a matrix made of composite particles having at least one platinum group metal on a ceria promoted, high temperature chemically stabilized refractory oxide powder. The refractory oxide powder can be either alumina, alumina powder which has been calcined at a temperature near incipient alpha alumina formation, silica-alumina or zirconia. The base metal or base metal oxide comprises about 15% to 90% by weight of the total weight and the platinum group metal comprises 0.05% to 10% by weight of the total weight. The catalyst composition can be applied as a washcoat to conventional substrates or it can be formed into shaped catalysts. The washcoat is made by mixing together one slip containing the composite particles with a second slip containing the base metal or base metal oxide particles.
    • 高温稳定催化剂由贱金属如铬,铪和铌的细颗粒或其氧化物分散在由二氧化铈促进的高温化学稳定的难熔氧化物上分散在由具有至少一个铂族金属的复合颗粒制成的基体中 粉末。 难熔氧化物粉末可以是在接近初始的α氧化铝形成的温度下煅烧的氧化铝,氧化铝粉末,二氧化硅 - 氧化铝或氧化锆。 贱金属或贱金属氧化物占总重量的约15重量%至90重量%,铂族金属占总重量的0.05重量%至10重量%。 催化剂组合物可以用作常规基材的修补基面涂层,也可以形成成型催化剂。 修补基面涂层通过将含有复合颗粒的一个滑块与含有贱金属或基体金属氧化物颗粒的第二滑动剂混合在一起而制成。