Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture
Patent
1999-03-31
2000-10-24
Dunn, Tom
Chemistry of inorganic compounds
Modifying or removing component of normally gaseous mixture
423240R, 423240S, 422168, 422169, 422177, B01D 5364
Patent
active
061362816
ABSTRACT:
The present invention relates to a method to catalyze the oxidation of Hg(0) in a flue gas stream prior to standard emissions control equipment. The oxidized mercury has been found to be more condensable than Hg(0) and consequently more easily removed from the gas phase. Accordingly, mercury in its oxidized form can be trapped from a flue gas stream or the like by absorption onto a solid mass or can be more efficiently removed from flue gas streams by wet processes such as a two-stage wet FGD. The gist underlying the inventive concept of the instant invention relates to the use of a porous bed of gold-coated material that is saturated with Hg(0) to the point that the gold in the presence of HCl in the exhaust stream catalyses the oxidation of Hg(0).
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patent: 5435980 (1995-07-01), Felsvang
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Meischen Sandra J.
Van Pelt Vincent J.
DiMauro Peter
Dunn Tom
Olexy Peter D.
Tennessee Valley Authority
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