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Method of removing and recovering elemental sulfur from highly reducing gas streams containing sulfur gases

United States Patent

November 8, 2005
View the Complete Patent at the US Patent & Trademark Office
A method is provided for removal of sulfur gases and recovery of elemental sulfur from sulfur gas containing supply streams, such as syngas or coal gas, by contacting the supply stream with a catalyst, that is either an activated carbon or an oxide based catalyst, and an oxidant, such as sulfur dioxide, in a reaction medium such as molten sulfur, to convert the sulfur gases in the supply stream to elemental sulfur, and recovering the elemental sulfur by separation from the reaction medium.
Gangwal; Santosh K. (Cary, NC), Nikolopoulos; Apostolos A. (Durham, NC), Dorchak; Thomas P. (late of Morgantown, WV), Dorchak; Mary Anne (Morgantown, WV)
Research Triangle Institute (Research Triangle Park, NC)
10/ 194,221
July 15, 2002
This application is made based on work supported by the U.S. Department of Energy under Contract No. DE-AC21-94MC31258. The U.S. Government may have certain rights in this invention.