SYSTEM AND METHOD FOR REDUCING NO2 POISONING

• US 20110085955A1
• Filed: 10/12/2009
• Published: 04/14/2011
• Est. Priority Date: 10/12/2009
• Status: Abandoned Application

• Current Assignee: Alstom Technology Ltd. (Alstom SA)
• Original Assignee: Alstom Technology Ltd. (Alstom SA)
• Inventors: LARSSON, Mikael
• Application Number:
  US12/577,316
• Publication Number:
  US 20110085955A1
• Time in Patent Office: Days
• US Class Current: 423/230
• CPC Class Codes: B01D 2257/402 Dinitrogen oxide
• CPC Class Codes: B01D 2257/504 Carbon dioxide
• CPC Class Codes: B01D 53/62 Carbon oxides
• CPC Class Codes: B01D 53/8625 Nitrogen 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 20/10 of nitrous oxide (N2O)

Abstract

A CO₂ capture system 200 including a system for removing NO₂ from a first gas stream 210 before CO₂ capture is disclosed. The CO₂ capture system 200 includes a protection bed 220 and a CO₂ absorber 260. The protection bed 220 may absorb the NO₂ or convert the NO₂ to either NO or N₂.

Claims

1. A CO₂ capture system, comprising:

a protection bed 220 configured to receive a first gas stream 210 and to substantially remove NO₂ from the first gas stream to produce a second gas stream 230; and

a CO₂ capture unit 260 configured to produce a CO₂ rich stream 280 from the second gas stream 230.

2. The system of claim 1, further comprising:

a gas treatment unit 240 configured to remove contaminants from the first gas stream 210 or the second gas stream 230.

3. The system of claim 1, wherein the protection bed 220 comprises a reduction catalyst to convert NO₂ in the first gas stream 210 to NO.

4. The system of claim 1, wherein the protection bed 220 comprises a catalyst and a reducing agent to reduce NO₂ in the first gas stream 210 to NO.

5. The system of claim 1, wherein the protection bed 220 comprises a carbon source material.

6. The system of claim 3, wherein the reducing agent is selected from the group comprising an unsaturated hydrocarbon, carbon monoxide and ammonia.

7. A facility, comprising:

a component generating a first gas stream 210 comprising CO₂; and

a CO₂ capture system 200 for removing CO₂ from the first gas stream 210, the CO₂ capture unit 200 comprising;

a protection bed 220 configured to receive the first gas stream 210 and to substantially remove NO₂ from the first gas stream 210 to produce a second gas stream 230; and

a CO₂ capture unit 260 configured to produce a CO₂ rich gas stream from the second gas stream 230.

8. The facility of claim 7, further comprising:

a gas treatment unit 240 configured to remove contaminants from the first gas stream 210 or the second gas stream 230.

9. The facility of claim 7, wherein the protection bed 220 comprises a reduction catalyst to convert NO₂ in the first gas stream 210 to NO.

10. The facility of claim 7, wherein the protection bed 220 comprises a catalyst and a reducing agent to reduce NO₂ in the first gas stream 210 to NO.

11. The facility of claim 7, wherein the protection bed 220 comprises a carbon source material.

12. The facility of claim 10, wherein the reducing agent is selected from the group comprising an unsaturated hydrocarbon, carbon monoxide and ammonia.

13. A method for removing carbon dioxide from a gas stream 210, comprising:

providing a first gas stream to a protection bed 220, the protection bed 220 configured to substantially remove NO₂ from the gas stream 210 to produce a second gas stream 230;

providing the second gas stream to a CO₂ capture unit 260 to produce a CO₂ rich gas stream 280.

14. The method of claim 13, further comprising:

removing contaminants from the first gas stream 210 or the second gas stream by a gas treatment unit 240.

15. The method of claim 13, wherein the protection bed 220 comprises a reduction catalyst to convert NO₂ in the first gas stream 210 to NO.

16. The method of claim 13, wherein the protection bed 220 comprises a catalyst and a reducing agent to reduce NO₂ in the first gas stream 210 to NO.

17. The method of claim 13, wherein a reducing agent is provided to the gas stream 210.

18. The method of claim 13, wherein the method is continuous.

19. The method of claim 13, wherein the NO₂ is removed from the gas stream 210 by reacting or absorbing the NO₂ with a carbon source material.

20. The method of 13, further comprising:

regenerating the protection bed 220 by flowing a reduction gas stream through the protection bed 220.