Sorbents for carbon dioxide capture

• US 9,155,996 B2
• Filed: 03/14/2014
• Issued: 10/13/2015
• Est. Priority Date: 03/14/2013
• Status: Active Grant

• Current Assignee: Board of Trustees of the Leland Stanford Junior University (Stanford Management Co.)
• Original Assignee: Board of Trustees of the Leland Stanford Junior University (Stanford Management Co.)
• Inventors: Wilcox, Jennifer, Stack, T. Daniel P., Bao, Zhenan, Gary, Brannon, He, Jiajun, To, John
• Primary Examiner(s): Jones, Christopher P
• Application Number:
  US14/213,859
• Publication Number:
  US 20140286844A1
• Time in Patent Office: 578 Days
• US Class Current: 1/1
• CPC Class Codes: B01D 2253/102 Carbon
• CPC Class Codes: B01D 2253/1122 Metals
• CPC Class Codes: B01D 2257/504 Carbon dioxide
• CPC Class Codes: B01D 53/02 by adsorption, e.g. preparative gas chromatography solid sorbent compositions B01J20/00, preparation of inorganic compounds or elements C01
• CPC Class Codes: B01D 53/62 Carbon oxides
• CPC Class Codes: B01D 53/85 with gas-solid contact
• CPC Class Codes: B01J 20/024 Compounds of Zn, Cd, Hg
• CPC Class Codes: B01J 20/0244 Compounds of Zn
• CPC Class Codes: B01J 20/103 comprising silica
• CPC Class Codes: B01J 20/20 comprising free carbon; comprising carbon obtained by carbonising processes
• CPC Class Codes: B01J 20/3204 Inorganic carriers, supports or substrates
• CPC Class Codes: B01J 20/3274 Proteins, nucleic acids, polysaccharides, antibodies or antigens
• CPC Class Codes: B01J 20/3458 in the gas phase
• CPC Class Codes: Y02C 20/40 of CO2

Abstract

Provided herein are sorbents for carbon dioxide (CO₂) capture, such as from natural gas and coal-fired power plant flue gases, and uses thereof.

Claims

1. A sorbent comprising:

a porous support; and

functionalizing moieties bound to the porous support,

wherein each of the functionalizing moieties includes a zinc atom and a ligand to form a coordination complex with the zinc atom, and

wherein the sorbent is capable of CO₂ chemisorption.

2. The sorbent of claim 1, wherein the porous support includes mesoporous carbon.

3. The sorbent of claim 1, wherein the porous support includes a mesoporous oxide.

4. The sorbent of claim 1, wherein the porous support has an effective pore size in a range of 1 nm to 10 nm.

5. The sorbent of claim 1, wherein the ligand is a tridentate ligand.

6. The sorbent of claim 1, wherein the ligand is an azamacrocycle.

7. The sorbent of claim 1, wherein the ligand is bound to the porous support via a triazole linker.

8. A method of sorption of CO₂ comprising contacting the sorbent of claim 1 with CO₂.

9. The method of claim 8, wherein the CO₂ is part of a flue gas emanating from a coal or natural gas burning power plant.

10. The method of claim 8, further comprising performing desorption of CO₂ from the sorbent, by heating the sorbent at a temperature up to 80°

C.

11. The method of claim 10, wherein heating is carried out at a temperature up to 60°

C.

12. The method of claim 10, wherein heating is carried out at a temperature up to 40°

C.

13. The sorbent of claim 1, wherein the porous support includes mesoporous silica.

14. The sorbent of claim 1, wherein the porous support includes hexagonal mesoporous carbon.

15. The sorbent of claim 1, wherein the porous support includes graphene.