Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Carbon dioxide or hydrogen sulfide component
Patent
1982-07-07
1984-04-10
Thomas, Earl C.
Chemistry of inorganic compounds
Modifying or removing component of normally gaseous mixture
Carbon dioxide or hydrogen sulfide component
423231, 502 38, 502 51, 502 52, B01D 5334
Patent
active
044420781
ABSTRACT:
A spent solid sorbent resulting from the removal of hydrogen sulfide from a fuel gas flow is regenerated with a steam-air mixture. The mixture of steam and air may also include additional nitrogen or carbon dioxide. The gas mixture contacts the spent sorbent containing metal sulfide at a temperature above 500.degree. C. to regenerate the sulfide to metal oxide or carbonate. Various metal species including the period four transition metals and the lanthanides are suitable sorbents that may be regenerated by this method. In addition, the introduction of carbon dioxide gas permits carbonates such as those of strontium, barium and calcium to be regenerated. The steam permits regeneration of spent sorbent without formation of metal sulfate. Moreover, the regeneration will proceed with low oxygen concentrations and will occur without the increase in temperature to minimize the risk of sintering and densification of the sorbent.
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Jolan, "High Temperature DeSulfurization of Coal Gases by Regenerative Sorption", 1981 International Gas Research Conference, Los Angeles, California, Sep. 28-Oct. 1, 1981.
Frost David G.
Jalan Vinod M.
Esposito Michael F.
Fisher Robert J.
Glenn Hugh W.
The United States of America as represented by the United States
Thomas Earl C.
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