Liquid carbon dioxide absorbents, methods of using the same, and related systems

Patent metadata

Field	Value
Publication number	US-9440182-B2
Application number	US-201113332843-A
Country	US
Kind code	B2
Filing date	Dec 21, 2011
Priority date	Dec 24, 2008
Publication date	Sep 13, 2016
Grant date	Sep 13, 2016

Abstract

A carbon dioxide absorbent composition is described, including (i) a liquid, nonaqueous silicon-based material, functionalized with one or more groups that either reversibly react with CO 2 or have a high-affinity for CO 2 ; and (ii) a hydroxy-containing solvent that is capable of dissolving both the silicon-based material and a reaction product of the silicon-based material and CO 2 . The absorbent may be utilized in methods to reduce carbon dioxide in an exhaust gas, and finds particular utility in power plants.

First claim

The invention claimed is:

1. A carbon dioxide absorbent, comprising: (i) a liquid, nonaqueous silicon-based material, functionalized with one or more nitrogen atom-containing groups that reversibly react with CO 2 and/or have a high-affinity for CO 2 ; and (ii) a hydroxy-containing solvent that is capable of dissolving both the silicon-based material and a reaction product of the silicon-based material and CO 2 .

2. The absorbent of claim 1 , wherein the functionalized silicon-based material comprises silanes, or compounds containing one or more siloxy units, or combinations of thereof.

3. The absorbent of claim 1 , wherein the functional group(s) comprise(s) one or more aliphatic amines, imines, amidines, amides, heterocyclic amino compounds, aromatic amines, and combinations thereof.

4. The absorbent of claim 3 , wherein the functional group(s) comprise(s) one or more amines.

5. The absorbent of claim 4 , wherein the functional group(s) comprise(s) one or more di-, tri- and polyamines or combinations of these.

6. The absorbent of claim 5 , wherein the functional group(s) comprise(s) one or more aminomethyl, aminoethyl, aminopropyl, aminoethylaminopropyl, piperazinopropyl, aminomethylaminoethyl, 2 aminopropylpyridyl, groups or combinations of these.

7. The absorbent of claim 1 , wherein the functional group(s) comprise(s) one or more amino hydroxy groups.

8. The absorbent of claim 1 , wherein the solvent has a vapor pressure below about 150 mm Hg at 100° C.

9. The absorbent of claim 1 , wherein the solvent comprises two or more hydroxyl groups.

10. The absorbent of claim 9 , wherein the solvent comprises a glycol, a hydroxylated silicone, a phenol, or combinations of the foregoing.

11. The absorbent of claim 10 , wherein the solvent comprises trimethylolpropane ethoxylates, glycerol, triethylene glycol, tetraethylene glycol, 1,3-bis(3-hydroxypropyl)tetramethyldisiloxane, a hydrosilylation reaction product of 1,1,3,3-tetramethyldisiloxane and trimethylolpropane allyl ether, eugenol, isoeugenol, 2-allyl-6-methylphenol, 2-allylphenol or combinations of the foregoing.

12. The absorbent of claim 1 , further comprising antioxidants, stabilizers, accelerators, antifoaming agents or blends thereof.

13. The carbon dioxide absorbent of claim 1 , wherein the nitrogen atom-containing functional group is not a sterically hindered amine.

14. The carbon dioxide absorbent of claim 1 , wherein the functionalized, silicon-based material comprises less than 20 repeating, monomeric units.

15. The carbon dioxide absorbent of claim 14 , wherein the functionalized, silicon-based material comprises 10 or less repeating, monomeric units.

Assignees

• O'Brien Michael Joseph
• Perry Robert James
• Lam Tunchiao Hubert
• Soloveichik Grigorii Lev
• Kniajanski Sergei
• Lewis Larry Neil
• Rubinsztajn Malgorzata Iwona
• Hancu Dan
• Gen Electric

Inventors

• O'Brien Michael Joseph
• Perry Robert James
• Lam Tunchiao Hubert
• Soloveichik Grigorii Lev
• Kniajanski Sergei
• Lewis Larry Neil
• Rubinsztajn Malgorzata Iwona
• Hancu Dan

Classifications

• B01D2252/504

  Mixtures of two or more absorbents · CPC title

• Y02C10/06

  Cross-Sectional Technologies · mapped topic

• B01D2252/2025

  Ethers or esters of alkylene glycols, e.g. ethylene or propylene carbonate · CPC title

• F23J2215/50

  Carbon dioxide · CPC title

• B01D2258/0283

  Flue gases · CPC title