Catalysts for the Desulfurization of Coke-Oven Gas

摘要

Two promising catalysts are tested in the desulfurization of coke-oven gas at OAO Magnitogorsk^ Metallurgicheskii Kombinat in a pilot plant (with a gas flow rate of up to 0.78 mvh): AOK-78-57 titanium-oxide catalyst (produced by OOO Katalizator, Novosibirsk); and VA-2 vanadium catalyst on an aluminum-oxide substrate (developed at the Institute of Catalysis, Siberian Branch, Russian Academy of Sciences and produced by OOO Novomichurinskii Katalizatornyi Zavod). The VA-2 catalyst shows some benefits in the conversion of hydrogen sulfide, with practically the same activity in the conversion of organosulfur components (CS_2 and COS). With a final temperature of 450°C, CS_2 conversion at VA-2 catalyst exceeds 99.5%, on average. Accordingly, VA-2 catalyst is promising for use in the first stages of catalytic conversion in sulfur-removal units of Claus type, including those for the desulfurization of coke-oven gas.