Analysis of the Deactivation of Claus Alumina Catalyst During Its Industrial Exploitation
Catalysis in Industry
, E-ISSN: 2070-0555
||Alumina catalyst, Deactivation, H2S oxidation, Hydrolysis of COS
Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090 Russia
Novosibirsk State University, Novosibirsk, 630090 Russia
OOO Institut Gipronikel’, St. Petersburg, 195220 Russia
Change in the activity of AO-NKZ-2 (AO-MK-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 coke-oven gas purification shop 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.