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    • 2. 发明授权
    • Method and catalyst for catalytically oxidizing a low concentration of
H.sub.2 S in a gas to give sulphur
    • 用于催化氧化气体中低浓度H 2 S以产生硫的方法和催化剂
    • US6083471A
    • 2000-07-04
    • US875703
    • 1997-11-19
    • Andre PhilippeSabine Savin-PoncetJean NougayredeMarc LedouxCuong Pham HuuClaude Crouzet
    • Andre PhilippeSabine Savin-PoncetJean NougayredeMarc LedouxCuong Pham HuuClaude Crouzet
    • B01D53/52B01D53/86B01J27/224B01J32/00B01J37/20C01B17/04
    • B01D53/8612B01J27/224B01J37/20C01B17/0465Y10S502/517
    • A process for catalytically oxidizing the H.sub.2 S present at low concentration in a gas to sulphur wherein the gas together with a gas containing free oxygen in a quantity to provide and O.sub.2 to H.sub.2 S mole ratio ranging from 0.05 to 10 are contacted with a catalyst for selectively oxidizing H.sub.2 S to sulphur, the catalyst comprising a support based on silicon carbide associated with a catalytic active phase containing at least one transition metal such as Fe, Ni, Cr, Co, Cu, Ag, Mn, Mo, Ti, W or V, in a form of a metal compound and/or in the elemental state. Prior to treating the gas, the oxidation catalyst is subjected to an activation treatment which loads the active phase of the catalyst to provide maximum sulphurization of the metal of the catalyst. In an alternate embodiment, the oxidation of the H.sub.2 S is performed below the dew point of the sulphur. In another embodiment, the oxidation is performed at a temperature above the dew point of sulphur and in particular between 200.degree. C. and 500.degree. C. Also disclosed is a catalyst for selectively oxidizing H.sub.2 S to sulphur which comprises a catalytically active phase based on at least one transition metal such as indicated above in combination with a silicon carbide support.
    • PCT No.PCT / FR95 / 01524 Sec。 371日期:1997年11月19日 102(e)日期1997年11月19日PCT 1995年11月20日PCT PCT。 公开号WO97 / 19019 日期1997年5月29日一种催化氧化气体中硫浓度低的H 2 S的方法,其中气体与含有游离氧气的气体一起提供,O 2与H 2 S摩尔比为0.05至10,与 用于选择性地将H 2 S氧化成硫的催化剂,所述催化剂包括与包含至少一种过渡金属如Fe,Ni,Cr,Co,Cu,Ag,Mn,Mo,Ti,W的催化活性相相关的碳化硅的载体 或V,以金属化合物的形式和/或元素状态。 在处理气体之前,将氧化催化剂进行活化处理,负载催化剂的活性相以提供催化剂金属的最大硫化。 在另一个实施方案中,H2S的氧化在硫的露点之下进行。 在另一个实施方案中,氧化在高于硫的露点,特别是在200℃和500℃之间的温度下进行。还公开了一种用于选择性地将H 2 S氧化成硫的催化剂,其包含基于 至少一种过渡金属,如上所述与碳化硅载体组合。