Abstract
Change in the activity of AONKZ�2 (AOMK�2) alumina catalyst in the Claus reaction and transformations of carbonyl sulfide during operation over four years in the Claus reactor at the Magnitogorsk Metallurgical Combine's cokeoven gas purification sh op were studied at an average temperature of 245- 260°C and a volume velocity of ~2000 h -1 . The rate constants of the Claus reactions and COS transformation were determined, and the changes in the active surface area of the catalyst were investigated. Fundamental discrepancies in the rate and deactivation mechanism of the Claus catalysts were revealed with respect to the reactions of the conversion of hydrogen sulfide and carbonyl sulfide.
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