COMPOSITION FOR ACID GAS TOLERANT REMOVAL OF MERCURY FROM A FLUE GAS
First Claim
1. A sorbent composition for the treatment of a flue gas, the sorbent composition comprising particulate porous carbonaceous sorbent material and a multi-functional agent, the multi-functional agent comprising a trivalent or higher Group 3 to Group 14 metal-containing compound selected from the group consisting of a carbonate, an oxide, a hydroxide, an ionic salt precursor to a hydroxide and combinations thereof.
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Accused Products
Abstract
Compositions and method useful for removal of mercury from a flue gas stream with relatively high concentrations of acid gas precursors and/or acid gases. The method includes contacting the flue gas stream with a sorbent composition comprising a sorbent material and a multi-functional agent, where the multi-functional agent includes a compound having a metal of valency 3 or higher. The multi-functional agent may be an inorganic salt, wherein either the cation or anion of the salt comprises a metal selected from Group 3 to 14 metal, such as aluminum. A halogen such as in the form of a halide salt that helps facilitate the oxidation of elemental mercury into its oxidized form may be present in the sorbent composition.
28 Citations
42 Claims
- 1. A sorbent composition for the treatment of a flue gas, the sorbent composition comprising particulate porous carbonaceous sorbent material and a multi-functional agent, the multi-functional agent comprising a trivalent or higher Group 3 to Group 14 metal-containing compound selected from the group consisting of a carbonate, an oxide, a hydroxide, an ionic salt precursor to a hydroxide and combinations thereof.
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35. (canceled)
- 36. A sorbent composition for the treatment of a flue gas, the sorbent composition comprising at least about 50 wt. % of a particulate porous carbonaceous sorbent material and at least about 1 wt. % and not greater than about 20 wt. % of a multi-functional agent, the multi-functional agent comprising a metal-containing compound selected from the group consisting of aluminum hydroxide and an ionic metal salt precursor to aluminum hydroxide.
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42-91. -91. (canceled)
Specification