Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Carbon dioxide or hydrogen sulfide component
Patent
1992-03-26
1993-10-26
Straub, Gary P.
Chemistry of inorganic compounds
Modifying or removing component of normally gaseous mixture
Carbon dioxide or hydrogen sulfide component
423230, 423233, 42324403, 42324406, 423576, 4235762, 4235768, C01B 1716
Patent
active
052563847
ABSTRACT:
To a gas which contains H.sub.2 S and water vapor and which is to be desulfurized oxygen is added at such a rate that the gas contains 1 to 20 moles O.sub.2 per mole of H.sub.2 S. At a temperature in the range of 50.degree. to 180.degree. C. the gas is contacted with activated carbon, which is thus laden with elemental sulfur and with at least 3% by weight sulfuric acid. In a suitable processing, the gas which is to be desulfurized and contains at least 1000 ppm H.sub.2 S+SO.sub.2 is initially passed at a temperature from 100.degree. to 180.degree. C. through a catalytic prepurifier, in which elemental sulfur is adsorbed on a high-metal-oxide catalyst, oxygen is admixed to the gas coming from the prepurifier and the gas at a temperature of 50.degree. to 180.degree. is contacted with the activated carbon for a final desulfurization.
REFERENCES:
patent: 4141962 (1979-02-01), Dupuy et al.
patent: 4219537 (1980-08-01), Steiner
patent: 4263271 (1981-04-01), Henning et al.
patent: 5039507 (1991-08-01), Sturm
"Claus Sulfur Plant Operation for the Maintenance of Catalyst Activity" by William S. Norman presented to Gas Conditioning Conference on Mar. 8, 1976 in Norman, Oklahoma U.S.A.; Kaiser Aluminum & Chemical Corp. Baton Rouge, Louisana U.S.A.
Cornel Peter
Lell Rainer
Neuroth Gabriele
Rolke Dietrich
Stetzer Klaus
Dubno Herbert
Metallgesellschaft Aktiengesellschaft
Myers Jonathan
Straub Gary P.
Vanoy Timothy C.
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