Carbon dioxide decomposition

Patent metadata

Field	Value
Publication number	US-9364791-B1
Application number	US-201514620354-A
Country	US
Kind code	B1
Filing date	Feb 12, 2015
Priority date	Feb 12, 2015
Publication date	Jun 14, 2016
Grant date	Jun 14, 2016

Abstract

Carbon monoxide and oxygen gas can be produced from carbon dioxide by introducing a supply of CO 2 -containing gas to a CO 2 permeable porous media. The CO 2 permeates through the media to separate the CO 2 from other species in the CO 2 -containing gas supply. An oxygen-deficient ferrite material, disposed on a surface of the CO 2 permeable porous media, contacts with the separated CO 2 at decomposition reaction conditions to produce CO and O 2 . Corresponding devices for treating exhaust gases from a CO 2 exhaust gas-producing apparatus are also provided.

First claim

What is claimed is:

1. A method for producing CO and O 2 from CO 2 , said method comprising:
introducing a supply of CO 2 -containing gas to a first surface of a CO 2 permeable porous media so that CO 2 permeates through the media to separate at least a portion of the CO 2 from other species in the CO 2 -containing gas supply;
contacting the separated CO 2 at decomposition reaction conditions with an oxygen-deficient ferrite material on a mixed perovskite powder disposed on a second surface of the CO 2 permeable porous media to produce CO and O 2 .

2. The method of claim 1 wherein said CO 2 permeable porous media comprises a membrane of ceramic, eutectic carbonate or both.

3. The method of claim 1 wherein the permeable porous media comprises a mixed conducting perovskite catalyst.

4. The method of claim 3 wherein the mixed conducting perovskite catalyst comprises a Group VIII metal selected from the group consisting of Fe, Co and Ni.

5. The method of claim 1 wherein the CO 2 permeable porous media comprises an outer surface whereon the oxygen-deficient ferrite material is disposed.

6. The method of claim 5 wherein a catalyst effective to prevent carbon deposition is incorporated with the oxygen-deficient ferrite material.

7. The method of claim 6 wherein the catalyst effective to prevent carbon deposition comprises Rh.

8. The method of claim 7 wherein a mixed conducting perovskite catalyst forms a support for both the oxygen-deficient ferrite material and Rh as well as to catalyze micro-cell redox reaction whereby O 2− react to form O 2 .

9. The method of claim 1 wherein the decomposition reaction conditions include operation at a temperature of less than 700° C.

10. The method of claim 9 wherein the decomposition reaction conditions include operation at a temperature in a range of 300° C. to 450° C.

11. The method of claim 1 wherein the supply of CO 2 -containing gas introduced into the CO 2 permeable porous media comprises a portion of a quantity of apparatus-produced exhaust gases introduced to the CO 2 permeable porous media.

12. The method of claim 11 wherein the exhaust gases are produced by an apparatus selected from the group consisting of a furnace, an engine and a boiler.

13. A method for treating elevated temperature exhaust gases from a CO 2 exhaust gas-producing apparatus, said method comprising:
introducing the elevated temperature exhaust gases to a CO 2 permeable porous media so that CO 2 permeates through the media to separate at least a portion of the CO 2 from other apparatus-produced exhaust gases;
contacting an oxygen-deficient ferrite material disposed on an outer surface of the CO 2 permeable porous media with the separated CO 2 at decomposition reaction conditions to produce CO and O 2 .

14. The method of claim 13 wherein said contacting of the oxygen-deficient ferrite material disposed on the outer surface of the CO 2 permeable porous media with the separated CO 2 at decomposition reaction conditions to produce CO and O 2 comprises:
first contacting the oxygen-deficient ferrite material disposed on the surface of the CO 2 permeable porous media with the separated CO 2 to produce CO and O 2− and
second contacting a micro-cell redox reaction catalyst with the O 2− at redox reaction conditions to produce O 2 .

15. The method of claim 13 wherein the CO 2 permeable porous media comprises a mixed conducting perovskite catalyst comprising a metal selected from the group consisting of Fe, Co and Ni and wherein a catalyst effective to prevent carbon deposition is incorporated with the oxygen-deficient ferrite material.

16. The method of claim 15 wherein a mixed conducting perovskite catalyst forms a support for both the oxygen-deficient ferrite material and the catalyst effective to prevent carbon deposition as well as to catalyze micro-cell redox reaction whereby O 2− react to form O 2 .

17. The method of claim 13 wherein the decomposition reaction conditions include operation at a temperature of less than 700° C.

18. The method of claim 17 wherein the decomposition reaction conditions include operation at a temperature in a range of 300° C. to 450° C.

19. The method of claim 13 wherein the CO 2 exhaust gas-producing apparatus is selected from the group consisting of a furnace, an engine and a boiler.

20. A device for treating exhaust gases from a CO 2 exhaust gas-producing apparatus, said device comprising:
a CO 2 permeable porous media comprising a mixed conducting perovskite catalyst, the CO 2 permeable porous media having an outer surface whereon the oxygen-deficient ferrite material is disposed and incorporates a catalyst effective to prevent carbon deposition,
the CO 2 permeable porous media having an entrance for introducing the exhaust gases from a CO 2 exhaust gas-producing apparatus and an exit for passage of non-CO 2 gases.

Assignees

• Fan Qinbai
• Gas Technology Inst

Inventors

• Fan Qinbai

Classifications

• B01D53/94 Primary

  by catalytic processes · CPC title

• B01D53/229 Primary

  Integrated processes (Diffusion and at least one other process, e.g. adsorption, absorption) · CPC title

• B01D53/8671

  Removing components of defined structure not provided for in B01D53/8603 - B01D53/8668 · CPC title

• B01D2255/402

  Perovskites · CPC title

• B01D2257/504

  Carbon dioxide · CPC title