CO2 ABSORPTION BY SOLID MATERIALS

• US 20090145297A1
• Filed: 11/18/2008
• Published: 06/11/2009
• Est. Priority Date: 12/11/2007
• Status: Abandoned Application

• Current Assignee: Alstom Technology Ltd. (Alstom SA)
• Original Assignee: Alstom Technology Ltd. (Alstom SA)
• Inventors: Ferguson, Alan William, Hilton, Robert Gudmundsen
• Application Number:
  US12/272,983
• Publication Number:
  US 20090145297A1
• Time in Patent Office: Days
• US Class Current: 95/90
• CPC Class Codes: B01D 2257/504 Carbon dioxide
• CPC Class Codes: B01D 53/1475 Removing carbon dioxide
• CPC Class Codes: B01D 53/1493 Selection of liquid materials for use as absorbents
• CPC Class Codes: Y02A 50/20 Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
• CPC Class Codes: Y02C 20/40 of CO2

Abstract

A system and method for capturing carbon dioxide (CO2) from a process gas stream is provided. An absorbent coated on a substrate (300) is subjected to a gas stream containing carbon dioxide (CO2) to remove at least a portion of the CO2 contained in the gas stream.

Claims

1. A system for removing CO2 from a flue gas wherein the system comprises an absorber vessel configured to receive a flue gas stream via a flue gas inlet.

2. The system of claim 1 wherein the absorber vessel is further configured to support an absorbent so that it can be exposed to the flue gas stream.

3. The system of claim 2 further comprising a damper for controlling the flow of a flue gas stream into the absorber.

4. The system of claim 2 wherein the absorbent is coated on a solid substrate.

5. The system of claim 4 wherein the absorbent comprises an amine.

6. The system of claim 4 wherein the absorbent comprises an amine compound.

7. The system of claim 5 wherein the solid substrate comprises Polymethyl methacrylate (PMMA) spheres.

8. The system of claim 5 wherein the solid substrate comprises a high surface area material.

12. The method of claim 8 wherein the solid substrate comprises polymethyl methacrylate (PMMA) spheres.

15. The method of claim 12 wherein the solid substrate comprises a high surface area material.

9. A method of removing CO2 from a flue gas comprises the steps of:

exposing a flue gas to an absorbent; and

exposing the absorbent to a regeneration gas stream.

10. The method of claim 9 wherein the flue gas is exposed to an absorbent that is coated on a solid substrate.

11. The method of claim 9 wherein the absorbent comprises an amine.

13. The method of claim 10 wherein the absorbent is exposed to a regeneration gas stream at a pressure level lower than the pressure level of the flue gas stream.

14. The method of claim 9 wherein the absorbent comprises an amine compound.

16. The method of claim 9 wherein the absorbent comprises an acrylonitrile-modified tetraethylenepentamine (TEPAN).

17. The method of claim 9 wherein the absorbent comprises tetraethylenepentamine (TEPA).

18. The method of claim 9 wherein the absorbent comprises an acrylonitrile-modified ethyleneamine (ME-100).

19. A system for removing CO2 from a flue gas wherein the system comprises:

an absorber vessel configured to receive a flue gas stream via a flue gas inlet and to support an absorbent so that it can be exposed to the flue gas stream;

a damper for controlling the flow of a flue gas stream into the absorber; and

wherein the absorbent is coated on a solid substrate.