SORBENTS FOR CARBON DIOXIDE CAPTURE

• US 20140286844A1
• Filed: 03/14/2014
• Published: 09/25/2014
• 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, Bao, Zhenan, Stack, T. Daniel P., Gary, Brannon, He, Jiajun, To, John
• Granted Patent: US 9,155,996 B2
• Time in Patent Office: Days
• US Class Current: 423/230
• 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 support; and

functionalizing moieties bound to the support,

wherein at least one of the functionalizing moieties includes a zinc atom, and

wherein the sorbent is capable of CO₂ sorption.

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

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

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

5. The sorbent of claim 1, wherein at least one of the functionalizing moieties includes a ligand to form a coordination complex with the zinc atom.

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

7. The sorbent of claim 5, wherein the ligand is an azamacrocycle.

8. The sorbent of claim 5, wherein the ligand is bound to the support via a triazole linker.

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

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

11. The method of claim 9, further comprising performing desorption of CO₂ from the sorbent, by heating the sorbent at a temperature up to 80°

C.

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

C.

13. The method of claim 11, wherein heating is carried out at a temperature up to 40°

C.