Method for producing a moisture swing sorbent for carbon dioxide capture from air

Patent metadata

Field	Value
Publication number	US-9283510-B2
Application number	US-201214240053-A
Country	US
Kind code	B2
Filing date	Aug 21, 2012
Priority date	Aug 22, 2011
Publication date	Mar 15, 2016
Grant date	Mar 15, 2016

Abstract

Methods and systems for producing a moisture swing sorbent for carbon dioxide capture from air are disclosed. In some embodiments, the methods include the following: providing a heterogeneous ion-exchange material; soaking the material in deionized water; washing the material in hydroxide or carbonate solutions; rinsing the material in deionized water; collecting and titrating residuals of the soaking and the washing steps into a residual solution; measuring an amount of chloride in the residual solution; repeating all of the steps if the amount of chloride measured in the residual solution is greater than zero; and drying the material with either dry nitrogen gas or air free of carbon dioxide and water.

First claim

What is claimed is:

1. A method for producing a moisture swing sorbent for carbon dioxide capture from air, said method comprising:
providing a heterogeneous ion-exchange material;
soaking said material in deionized water;
washing said material in hydroxide or carbonate solutions;
rinsing said material in deionized water;
collecting and titrating residuals of said soaking and said washing steps into a residual solution;
measuring an amount of chloride in said residual solution;
repeating all of said steps if said amount of chloride measured in said residual solution is greater than zero; and
drying said material with either dry nitrogen gas or air free of carbon dioxide and water.

2. The method according to claim 1 , wherein said deionized water has a temperature of about 89 to about 95 degrees Celsius.

3. The method according to claim 1 , wherein said material is soaked in deionized period for a period of about 24 to about 48 hours.

4. The method according to claim 1 , wherein said material has a thickness of about 0.1 to about 1.5 millimeters.

5. The method according to claim 1 , wherein said material is washed in one of a 1.0 M sodium hydroxide solution and a 0.5 M sodium carbonate solution.

6. The method according to claim 1 , wherein original exchangeable anions of said material are chloride ions.

7. The method according to claim 6 , further comprising:
replacing said chloride ions with hydroxide or carbonate ions.

8. The method according to claim 1 , wherein said material is a co-extruded sheet that includes a polymer matrix and a resin powder having quaternary ammonium functional groups.

9. The method according to claim 8 , wherein said resin powder is about 50 to about 70 percent by weight of said sheet.

10. The method according to claim 8 , wherein said resin powder includes resin particles having a size of about 20 μm to about 60 μm.

11. The method according to claim 8 , wherein said sheet has a surface area of about 2.0 square meters per gram.

12. The method according to claim 8 , wherein a surface area of said resin powder is about 400 times an apparent surface area of said sheet.

13. The method according to claim 8 , wherein said sheet has a porous structure with pore sizes ranging from about 2 μm to about 50 μm.

14. The method according to claim 13 , wherein said porous structure includes spaces between said resin powder resin and said polymer matrix.

Assignees

• Lackner Klaus S
• Univ Columbia

Inventors

• Lackner Klaus S

Classifications

• B01D2253/202

  Polymeric adsorbents · CPC title

• B01D53/047

  Pressure swing adsorption · CPC title

• B01D2257/504

  Carbon dioxide · CPC title

• B01D53/02

  by adsorption, e.g. preparative gas chromatography {(solid sorbent compositions B01J20/00, preparation of inorganic compounds or elements C01)} · CPC title

• B01J49/0073

  Operations & Transport · mapped topic