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Metal sulfide initiators for metal oxide sorbent regeneration

United States Patent

October 23, 2001
View the Complete Patent at the US Patent & Trademark Office
A process of regenerating a sulfided sorbent is provided. According to the process of the invention, a substantial portion of the energy necessary to initiate the regeneration reaction is provided by the combustion of a particulate metal sulfide additive. In using the particulate metal sulfide additive, the oxygen-containing gas used to regenerate the sulfided sorbent can be fed to the regeneration zone without heating or at a lower temperature than used in conventional processes wherein the regeneration reaction is initiated only by heating the oxygen-containing gas. The particulate metal sulfide additive is preferably an inexpensive mineral ore such as iron pyrite which does not adversely affect the regeneration or corresponding desulfurization reactions. The invention further includes a sorbent composition comprising the particulate metal sulfide additive in admixture with an active metal oxide sorbent capable of removing one or more sulfur compounds from a sulfur-containing gas stream.
Turk; Brian S. (Durham, NC), Gupta; Raghubir P. (Durham, NC)
Research Triangle Institute (Research Triangle Park, NC)
09/ 282,608
March 31, 1999
This invention was made with support from the United States Government under Contract No. DE-AC21-88MC25006 awarded by the United States Department of Energy. The U.S. Government may have certain rights to this Invention.