Sorbents for the oxidation and removal of mercury
First Claim
1. A method for separating mercury from a mercury containing gas comprising:
- (a) providing a carbon sorbent material and a non-carbon sorbent material, wherein the carbon sorbent material comprises activated carbon;
(b) providing a halogen or halide promoter;
(c) promoting at least a portion of the carbon sorbent material and the non-carbon sorbent material by chemically reacting the carbon sorbent material and the non-carbon sorbent material with the halogen or halide promoter to form a promoted halogenated carbon sorbent and a promoted halogenated non-carbon sorbent;
(d) chemically reacting elemental mercury in the mercury containing gas with the promoted halogenated carbon sorbent and the promoted halogenated non-carbon sorbent to form a mercury/sorbent chemical composition; and
(e) separating particulates from the mercury containing gas to form a cleaned gas, the particulates including ash and the mercury/sorbent chemical composition.
7 Assignments
0 Petitions
Accused Products
Abstract
A promoted carbon and/or non-carbon base sorbent are described that are highly effective for the removal of mercury from flue gas streams. The promoted sorbent comprises a carbon and/or non-carbon base sorbent that has reacted with and contains forms of halogen and halides. Optional components may be added to increase and/or preserve reactivity and mercury capacity. These may be added directly with the base sorbent, or in-flight within a gas stream (air, flue gas, etc.), to enhance base sorbent performance and/or mercury capture. Mercury removal efficiencies obtained exceed conventional methods. The promoted sorbent can be regenerated and reused. Base sorbent treatment and preparation methods are also described. Methods for in-flight preparation, introduction, and control of the active base sorbent into the mercury contaminated gas stream are described.
108 Citations
30 Claims
-
1. A method for separating mercury from a mercury containing gas comprising:
-
(a) providing a carbon sorbent material and a non-carbon sorbent material, wherein the carbon sorbent material comprises activated carbon; (b) providing a halogen or halide promoter; (c) promoting at least a portion of the carbon sorbent material and the non-carbon sorbent material by chemically reacting the carbon sorbent material and the non-carbon sorbent material with the halogen or halide promoter to form a promoted halogenated carbon sorbent and a promoted halogenated non-carbon sorbent; (d) chemically reacting elemental mercury in the mercury containing gas with the promoted halogenated carbon sorbent and the promoted halogenated non-carbon sorbent to form a mercury/sorbent chemical composition; and (e) separating particulates from the mercury containing gas to form a cleaned gas, the particulates including ash and the mercury/sorbent chemical composition. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
-
Specification