Carbon sorbents for the removal of nitrogen oxides and methods for making the same

Patent metadata

Field	Value
Publication number	US-2016236169-A1
Application number	US-201614992554-A
Country	US
Kind code	A1
Filing date	Jan 11, 2016
Priority date	Jan 9, 2015
Publication date	Aug 18, 2016
Grant date	—

Abstract

Adsorbents including a sorbent, at least one metal additive and greater than about 5 wt. % triethylenediamine are described herein. Methods for making such adsorbents and filters comprising the adsorbents are also described.

First claim

What is claimed is:

1 . An adsorbent comprising:
a sorbent having associated with a surface of the sorbent: about 2 wt. % to about 12 wt. % copper; about 1 wt. % to about 5 wt. % molybdenum; about 3 wt. % to about 6 wt. % sulfate; and about 5 wt. % to about 20 wt. % triethylenediamine.

2 . The adsorbent of claim 1 , further comprising about 2 wt. % to about 12 wt. % zinc.

3 . The adsorbent of claim 1 , further comprising about 0.03 wt. % to about 1.0 wt. % silver.

4 . The adsorbent of claim 1 , comprising about 6 wt. % to about 15 wt. % triethylenediamine.

5 . The adsorbent of claim 1 , further comprising about 2 wt. % to about 20 wt. % water.

6 . The adsorbent of claim 1 , wherein the adsorbent is selected from the group consisting of activated carbon, natural and synthetic zeolite, silica, silica gel, alumina, zirconia, and diatomaceous earths.

7 . A composition comprising:
a first adsorbent comprising an sorbent having associated with a surface of the sorbent: about 2 wt. % to about 12 wt. % copper; about 1 wt. % to about 5 wt. % molybdenum; about 3 wt. % to about 6 wt. % sulfate; and about 5 wt. % to about 20 wt. % triethylenediamine; and a second adsorbent for removal of ammonia.

8 . The composition of claim 7 , wherein the first adsorbent further comprises about 2 wt. % to about 12 wt. % zinc.

9 . The composition of claim 7 , wherein the first adsorbent further comprises about 0.03 wt. % to about 1.0 wt. % silver;

10 . The composition of claim 7 , wherein the first adsorbent comprises about 6 wt. % to about 15 wt. % triethylenediamine.

11 . The composition of claim 7 , wherein the first adsorbent further comprises about 2 wt. % to about 20 wt. % water.

12 . The composition of claim 7 , wherein the sorbent is selected from the group consisting of activated carbon, natural and synthetic zeolite, silica, silica gel, alumina, zirconia, and diatomaceous earths.

13 . The composition of claim 7 , wherein the first adsorbent and the second adsorbent are admixed.

14 . The composition of claim 7 , wherein the first adsorbent and the second adsorbent are layered.

15 . The composition of claim 7 , wherein the second adsorbent comprises a second sorbent having nickel chloride associated with a surface of the adsorbent.

16 . The composition of claim 15 , wherein the second sorbent is selected from the group consisting of activated carbon, natural and synthetic zeolite, silica, silica gel, alumina, zirconia, and diatomaceous earths.

17 . A method for making an adsorbent comprising:
impregnating a sorbent material with a composition comprising: about 2 wt. % to about 12 wt. % copper; about 1 wt. % to about 5 wt. % molybdenum; 3 wt. % to about 6 wt. % sulfate; and about 5 wt. % to about 20 wt. % triethylenediamine.

18 . The method of claim 17 , wherein the impregnating comprises impregnating with the composition further comprising about 2 wt. % to about 12 wt. % zinc.

19 . The method of claim 17 , wherein the impregnating comprises impregnating with the composition further comprising about 0.03 wt. % to about 1.0 wt. % silver.

Assignees

• Calgon Carbon Corp

Inventors

• Doughty David T
• Mcnamara Gina L

Classifications

• B01D2257/406

  Ammonia · CPC title

• B01J20/28052

  Several layers of identical or different sorbents stacked in a housing, e.g. in a column · CPC title

• B01J20/103

  comprising silica · CPC title

• B01J20/20

  comprising free carbon; comprising carbon obtained by carbonising processes · CPC title

• B01J20/3204

  Inorganic carriers, supports or substrates · CPC title