The thief process for mercury removal from flue gas |
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Authors: | Granite Evan J Freeman Mark C Hargis Richard A O'Dowd William J Pennline Henry W |
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Affiliation: | United States Department of Energy, National Energy Technology Laboratory, P.O. Box 10940 MS 58-106, Pittsburgh, PA 15236-0940, USA. evan.granite@netl.doe.gov |
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Abstract: | The Thief Process is a cost-effective variation to activated carbon injection (ACI) for removal of mercury from flue gas. In this scheme, partially combusted coal from the furnace of a pulverized coal power generation plant is extracted by a lance and then re-injected into the ductwork downstream of the air preheater. Recent results on a 500-lb/h pilot-scale combustion facility show similar removals of mercury for both the Thief Process and ACI. The tests conducted to date at laboratory, bench, and pilot-scales demonstrate that the Thief sorbents exhibit capacities for mercury from flue gas streams that are comparable to those exhibited by commercially available activated carbons. A patent for the process was issued in February 2003. The Thief sorbents are cheaper than commercially-available activated carbons; exhibit excellent capacities for mercury; and the overall process holds great potential for reducing the cost of mercury removal from flue gas. The Thief Process was licensed to Mobotec USA, Inc. in May of 2005. |
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Keywords: | Mercury Flue gas Sorbent Activated carbon Thief Process |
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