IP Library › Patent Application 14142636
Patent Application
App. No. 14/142,636

COMPOSITION FOR ACID GAS TOLERANT REMOVAL OF MERCURY FROM A FLUE GAS

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Patent No.
US None
App. No.
14/142,636
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.

Claims (42)

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.

2 . The sorbent composition of claim 1 , wherein the porous carbonaceous sorbent material is selected from the group consisting of activated carbon, reactivated carbon, carbonaceous char and combinations thereof.

3 . The sorbent composition of claim 1 , wherein the porous carbonaceous material comprises powdered activated carbon.

4 . The sorbent composition of claim 1 , wherein the particulate porous carbonaceous sorbent material has a D50 median particle size of not greater than about 30 μm.

5 . The sorbent composition of claim 1 , wherein the particulate porous carbonaceous sorbent material has a D50 median particle size of not greater than about 15 μm.

6 . The sorbent composition of claim 1 , wherein the particulate porous carbonaceous sorbent material has a D50 median particle size of at least about 8 μm and not greater than about 12 μm.

7 . The sorbent composition of claim 1 , wherein the multi-functional agent comprises trivalent or higher Group 3 to Group 14 metal-containing compound particulates that are dispersed with the particulate porous carbonaceous sorbent material.

8 . The sorbent composition of claim 7 , wherein, the multi-functional agent particulates have a D50 median particle size of not greater than about 10 μm.

9 . The sorbent composition of claim 7 , wherein, the multi-functional agent particulates have a D50 median particle size of not greater than about 1 μm.

10 . The sorbent composition of claim 1 , wherein the multi-functional agent comprises a coating on the particulate porous carbonaceous sorbent material.

11 . The sorbent composition of claim 1 , wherein the sorbent composition comprises at least about 0.5 wt. % of the multi-functional agent.

12 . The sorbent composition of claim 1 , wherein the sorbent composition comprises at least about 5 wt. % of the multi-functional agent.

13 . The sorbent composition of claim 1 , wherein the sorbent composition comprises not greater than 50 wt. % of the multi-functional agent.

14 . The sorbent composition of claim 1 , wherein the sorbent composition comprises not greater than 20 wt. % of the multi-functional agent.

15 . The sorbent composition of claim 1 , wherein the trivalent or higher metal is selected from Group 13 to Group 14 metals.

16 . The sorbent composition of claim 1 , wherein the trivalent or higher metal is a Group 13 metal.

17 . The sorbent composition of claim 1 , wherein the trivalent or higher metal is aluminum.

18 . The sorbent composition of claim 1 , wherein the trivalent or higher metal is tin.

19 . The sorbent composition of claim 1 , wherein the metal-containing compound comprises an anion and a cation, and wherein the cation comprises the trivalent or higher metal.

20 . The sorbent composition of claim 1 , wherein the metal-containing compound is a metal oxide.

21 . The sorbent composition of claim 20 , wherein the metal-containing compound is SnO 2 .

22 . The sorbent composition of claim 1 , wherein the metal-containing compound is a metal hydroxide.

23 . The sorbent composition of claim 22 , wherein the metal-containing compound is aluminum hydroxide.

24 . The sorbent composition of claim 1 , wherein the metal-containing compound is an ionic salt precursor to a hydroxide.

25 . The sorbent composition of claim 24 , wherein the ionic salt comprises a polyatomic anion and wherein the trivalent or higher Group 3 to Group 14 metal is a component of the polyatomic anion.

26 . The sorbent composition of claim 25 , wherein the polyatomic anion is an oxoanion.

27 . The sorbent composition of claim 26 , wherein the metal is aluminum.

28 . The sorbent composition of claim 27 , wherein the ionic salt comprises sodium aluminate.

29 . The sorbent composition of claim 26 , wherein the metal is tin.

30 . The sorbent composition of claim 29 , wherein the ionic salt comprises sodium stannate.

31 . The sorbent composition of claim 1 , wherein the sorbent composition comprises at least about 1 wt. % and not greater than about 15 wt. % of a halogen or halogen-containing compound.

32 . The sorbent composition of claim 31 , wherein the halogen or halogen-containing component comprises a bromide salt.

33 . The sorbent composition of claim 1 , wherein the sorbent composition loses not greater than about 15 wt. % sulfur during a sulfuric acid consumption test.

34 . The sorbent composition of claim 1 , wherein the sorbent composition loses not greater than about 10 wt. % sulfur during a sulfuric acid consumption test.

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.

37 . The sorbent composition of claim 36 , wherein the multi-functional agent comprises aluminum hydroxide.

38 . The sorbent composition of claim 36 , wherein the multi-functional agent comprises an ionic metal salt precursor.

39 . The sorbent composition of claim 38 , wherein the ionic metal salt precursor comprises an aluminate.

40 . The sorbent composition of claim 38 , wherein the ionic metal salt comprises sodium aluminate.

41 . The sorbent composition of claim 38 , wherein the ionic metal salt is coated onto the particulate porous carbonaceous sorbent material.

42 .- 91 . (canceled)

Assignments (3)
TERMINATION AND RELEASE OF SECURITY INTEREST IN PATENTS Recorded Jan 17, 2019
From: BABSON CAPITAL FINANCE LLC, AS ADMINISTRATIVE AGENT
To: ADA CARBON SOLUTIONS, LLC
Reel/Frame 048083/0294 →
SECURITY INTEREST Recorded Jun 24, 2015
From: ADA CARBON SOLUTIONS, LLC
To: BABSON CAPITAL FINANCE LLC, AS ADMINISTRATIVE AGENT
Reel/Frame 035893/0404 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Mar 20, 2014
From: WONG, JOSEPH M.; HUSTON, ROBERT B.; VIZCAINO, CHRISTOPHER; LOWRING, JACOB B.
To: ADA CARBON SOLUTIONS, LLC
Reel/Frame 032489/0362 →