SYSTEM AND METHOD FOR ENHANCED REMOVAL OF CO2 FROM A MIXED GAS STREAM

• US 20090238731A1
• Filed: 03/18/2009
• Published: 09/24/2009
• Est. Priority Date: 03/21/2008
• Status: Active Grant

• Current Assignee: General Electric Technology GmbH (General Electric Company)
• Original Assignee: Alstom Technology Ltd. (Alstom SA)
• Inventors: Handagama, Naresh B., Liu, Zheng
• Granted Patent: US 8,343,445 B2
• Time in Patent Office: Days
• US Class Current: 422/178
• 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: B01D 53/62 Carbon oxides
• 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 solvent based flue gas processing system for removing CO₂ from a flue gas stream is provided in which a catalyst coated on a support structure is provided. The catalyst selected is capable of retaining CO₂, at least for a period of time, thereby increasing the residence time of CO₂ and solvent.

Claims

1. A flue gas processing system comprising:

absorber tower configured to receive a mixed gas stream containing carbon dioxide and to contact it with a solvent; and

the absorber tower comprises packing materials that are coated with a catalyst.

2. The system of claim 1 wherein the catalyst is a heterogeneous catalyst.

3. The system of claim 1 wherein said flue gas system is an amine based flue gas processing system.

4. The system of claim 3 wherein the catalyst provided to promote the capture of carbon dioxide within the flue gas stream with amine.

5. The system of claim 1 wherein said mixed gas system is ammonia based mixed gas processing system.

6. A mixed gas processing system comprising:

regeneration tower configured to receive a carbon dioxide rich amine stream; and

the regeneration tower comprises packing materials that are coated/immobilized with a catalyst.

7. The system of claim 6 wherein the catalyst is a heterogeneous catalyst.

8. A mixed gas processing system comprising:

regeneration tower configured to receive a carbon dioxide rich ammonia stream; and

the regeneration tower comprises packing materials that are coated with a catalyst.

9. The system of claim 8 wherein the catalyst is a heterogeneous catalyst.

10. A mixed gas processing system comprising an absorber tower configured to receive a flue gas stream and an amine feed supply that includes a catalyst.

11. The system of claim 10 wherein the absorber tower is configured to cause the flue gas stream to contact amine/catalyst from the amine feed supply.

12. A mixed gas processing system comprising:

absorber tower configured to receive a flue gas stream; and

the absorber tower comprises packing materials that are coated/immobilized with a catalyst which can be used to activate CO₂ adsorbed onto its surfaces and catalyse carbonation/bi-carbonation and carbomation of amine with CO₂.

13. A mixed gas processing system comprising:

regeneration tower configured to receive a carbon dioxide rich amine stream; and

the regeneration tower comprises packing materials that are coated/immobilized with a catalyst which can be used to catalyse the decomposition of products formed from the carbonation/bi-carbonation and carbomation of amine with CO₂.

14. A mixed gas processing system comprising:

regeneration tower configured to receive a carbon dioxide rich ammonia stream; and

the regeneration tower comprises packing materials that are coated/immobilized with a catalyst which can be used to catalyse the decomposition of products formed from the reaction/interaction of ammonia with CO₂.

15. A mixed gas processing system comprising an absorber tower configured to receive a flue gas stream and an amine feed supply that includes a catalyst which can be used to catalyse CO₂ capture using amine/ammonia at low temperature and also the decomposition of products formed from the reaction/interaction of ammonia with CO₂ at high temperature.