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System and method for coproduction of activated carbon and steam/electricity

United States Patent

7,981,835
July 19, 2011
View the Complete Patent at the US Patent & Trademark Office
U.S. Department of Energy - Visit the Office of the Assistant General Counsel for Technology Transfer & Intellectual Property Website
A system and method for producing activated carbon comprising carbonizing a solid carbonaceous material in a carbonization zone of an activated carbon production apparatus (ACPA) to yield a carbonized product and carbonization product gases, the carbonization zone comprising carbonaceous material inlet, char outlet and carbonization gas outlet; activating the carbonized product via activation with steam in an activation zone of the ACPA to yield activated carbon and activation product gases, the activation zone comprising activated carbon outlet, activation gas outlet, and activation steam inlet; and utilizing process gas comprising at least a portion of the carbonization product gases or a combustion product thereof; at least a portion of the activation product gases or a combustion product thereof; or a combination thereof in a solid fuel boiler system that burns a solid fuel boiler feed with air to produce boiler-produced steam and flue gas, the boiler upstream of an air heater within a steam/electricity generation plant, said boiler comprising a combustion zone, a boiler-produced steam outlet and at least one flue gas outlet.
Srinivasachar; Srivats (Sturbridge, MA), Benson; Steven (Grand Forks, ND), Crocker; Charlene (Newfolden, MN), Mackenzie; Jill (Carmel, IN)
Energy & Environmental Research Center Foundation (Grand Forks, ND)
12/ 120,639
20090317320
May 14, 2008
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT This invention was made with government support under Contract Numbers DE-FC26-98FT40320 and DE-FC26-98FT40321 awarded by the United States Department of Energy. The government has certain rights in this invention.