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US 5,900,042 AGranted
Method for the removal of elemental mercury from a gas stream
AssigneeThe United States of America as represented by the United States Department of Energy
InventorsMarshall H. Mendelsohn, Hann-Sheng Huang
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Abstract
A method is provided to remove elemental mercury from a gas stream by reacting the gas stream with an oxidizing solution to convert the elemental mercury to soluble mercury compounds. Other constituents are also oxidized. The gas stream is then passed through a wet scrubber to remove the mercuric compounds and oxidized constituents.
Claims17
A method for removing elemental mercury from a gas stream comprising:
- contacting the gas stream containing elemental mercury with an aqueous oxidizing solution for sufficient time to form soluble mercuric compounds;
- contacting the gas stream containing mercuric compounds in an aqueous scrubber with an aqueous solution for sufficient time to remove the mercuric compounds;
- and
- separating the gas stream from the aqueous solution containing the mercuric compounds.
1 more element
A method for removing elemental mercury from a flue gas stream containing other constituents comprising:
- contacting the gas stream containing elemental mercury with an aqueous oxidizing solution for sufficient time to form mercuric compounds;
- contacting the gas stream containing the mercuric compounds and other constituents with an aqueous oxidizing solution for sufficient time to oxidize the other constituents;
- separating the gas stream containing mercuric compounds and oxidized constituents from the aqueous oxidizing solution;
- contacting the gas stream containing mercuric compounds and oxidized constituents in an aqueous scrubber with an aqueous solution for sufficient time to remove the mercuric compounds and oxidized constituents;
- and
- separating the gas stream from the aqueous solution containing the mercuric compounds.
3 more elements
Dependencies are inferred from the claim text.