Catalyst, carbon dioxide reducing method, and apparatus for reducing carbon dioxide

Patent metadata

Field	Value
Publication number	US-11305261-B2
Application number	US-201916970440-A
Country	US
Kind code	B2
Filing date	May 29, 2019
Priority date	May 29, 2018
Publication date	Apr 19, 2022
Grant date	Apr 19, 2022

Abstract

A catalyst of the present invention contains a first transition metal oxide (A1) represented by the general formula M1Ox, wherein M1 represents a transition metal element, and x represents a positive real number, and a metal compound (B1) capable of adsorbing carbon dioxide. The first transition metal oxide (A1) is supported on the metal compound (B1), and the first transition metal oxide (A1) can produce a compound represented by the general formula M1Ox-n by reduction, wherein M1 and x are as defined above, and n represents a positive real number equal to or less than x.

First claim

The invention claimed is:

1. A catalyst comprising:
a first transition metal oxide (A1) represented by the general formula M 1 O x , wherein M 1 represents a transition metal element, and x represents a positive real number; and
a metal compound (B1) capable of adsorbing carbon dioxide, wherein
the first transition metal oxide (A1) is supported on the metal compound (B1), and
the first transition metal oxide (A1) is capable of generating a compound represented by the general formula M 1 O x-n by reduction, wherein M 1 and x are as defined above, and n represents a positive real number equal to or less than x,
wherein the catalyst is oxidized by reduction of carbon dioxide and reduced by hydrogen.

2. The catalyst according to claim 1 , wherein the transition metal element represented by M 1 is at least one selected from the group consisting of iron, titanium, molybdenum, yttrium, chromium, lanthanum, and niobium.

3. The catalyst according to claim 1 , wherein the metal element constituting the metal compound (B1) is at least one metal selected from the group consisting of beryllium, magnesium, calcium, strontium, barium, and zinc.

4. The catalyst according to claim 1 , wherein the metal compound (B1) is a metal oxide.

5. A catalyst mixture comprising the catalyst according to claim 1 and an inactive buffering material.

6. The catalyst mixture according to claim 5 , wherein the inactive buffering material is an inorganic oxide.

7. The catalyst mixture according to claim 5 , wherein the inactive buffer material is at least one selected from the group consisting of an oxide containing a group 4 element and an oxide containing a group 14 element.

8. A carbon dioxide reducing method for reducing carbon dioxide using the catalyst mixture according to claim 5 , wherein
a catalyst reduction reaction to reduce the catalyst and a carbon dioxide reduction reaction to reduce carbon dioxide by the catalyst are carried out.

9. An apparatus for reducing carbon dioxide, comprising the catalyst mixture according to claim 5 .

10. A catalyst comprising:
a first transition metal oxide (A1) represented by the general formula M 1 O x , wherein M 1 represents a transition metal element, and x represents a positive real number;
a second transition metal oxide (A2) represented by the general formula M 2 O y , wherein M 2 is a transition metal element different from M 1 , and y is a positive real number; and
a metal compound (B1) capable of adsorbing carbon dioxide, wherein
the first transition metal oxide (A1) is supported on the metal compound (B1),
the second transition metal oxide (A2) is supported on the metal compound (B1), and
the first transition metal oxide (A1) is capable of generating a compound represented by the general formula M 1 O x-n by reduction, wherein M 1 and x are as defined above, and n represents a positive real number equal to or less than x.

11. The catalyst according to claim 10 , wherein the transition metal element represented by M 2 is cerium.

12. The catalyst according to claim 10 , wherein the transition metal element represented by M 1 is iron, and the transition metal element represented by M 2 is cerium.

13. The catalyst according to claim 10 , wherein a mass ratio of the second transition metal element represented by M 2 to the first transition metal element represented by M 1 (second transition metal element/first transition metal element) is 5/95 or more and 80/20 or less.

14. The catalyst according to claim 10 , wherein the transition metal element represented by M 1 is at least one selected from the group consisting of iron, titanium, molybdenum, yttrium, chromium, lanthanum, and niobium.

15. The catalyst according to claim 10 , wherein the metal element constituting the metal compound (B1) is at least one metal selected from the group consisting of beryllium, magnesium, calcium, strontium, barium, and zinc.

16. The catalyst according to claim 10 , wherein the metal compound (B1) is a metal oxide.

17. A catalyst mixture comprising the catalyst according to claim 10 and an inactive buffering material.

18. The catalyst mixture according to claim 17 , wherein the inactive buffering material is an inorganic oxide.

19. The catalyst mixture according to claim 17 , wherein the inactive buffer material is at least one selected from the group consisting of an oxide containing a group 4 element and an oxide containing a group 14 element.

20. A carbon dioxide reducing method for reducing carbon dioxide using the catalyst mixture according to claim 17 , wherein
a catalyst reduction reaction to reduce the catalyst and a carbon dioxide reduction reaction to reduce carbon dioxide by the catalyst are carried out.

21. An apparatus for reducing carbon dioxide, comprising the catalyst mixture according to claim 17 .

22. A catalyst comprising:
a first transition metal oxide (A1) represented by the general formula M 1 O x , wherein M 1 represents a transition metal element, and x represents a positive real number;
a metal compound (B1) capable of adsorbing carbon dioxide; and
a platinum-based compound (C1), wherein
the first transition metal oxide (A1) is supported on the metal compound (B1), and
the first transition metal oxide (A1) is capable of generating a compound represented by the general formula M 1 O x-n by reduction, wherein M 1 and x are as defined above, and n represents a positive real number equal to or less than x.

23. The catalyst according to claim 22 , wherein the transition metal element represented by M 1 is at least one selected from the group consisting of iron, titanium, molybdenum, yttrium, chromium, lanthanum, and niobium.

24. The catalyst according to claim 22 , wherein the metal element constituting the metal compound (B1) is at least one metal selected from the group consisting of beryllium, magnesium, calcium, strontium, barium, and zinc.

25. The catalyst according to claim 22 , wherein the metal compound (B1) is a metal oxide.

26. A catalyst mixture comprising the catalyst according to claim 22 and an inactive buffering material.

27. The catalyst mixture according to claim 26 , wherein the inactive buffering material is an inorganic oxide.

28. The catalyst mixture according to claim 26 , wherein the inactive buffer material is at least one selected from the group consisting of an oxide containing a group 4 element and an oxide containing a group 14 element.

29. A carbon dioxide reducing method for reducing carbon dioxide using the catalyst mixture according to claim 26 , wherein
a catalyst reduction reaction to reduce the catalyst and a carbon dioxide reduction reaction to reduce carbon dioxide by the catalyst are carried out.

30. An apparatus for reducing carbon dioxide, comprising the catalyst mixture according to claim 26 .

31. A carbon dioxide reducing method for reducing carbon dioxide using a catalyst,
wherein a catalyst reduction reaction to reduce the catalyst and a carbon dioxide reduction reaction to reduce carbon dioxide by the catalyst are carried out, and
wherein the catalyst comprises:
a first transition metal oxide (A1) represented by the general formula M 1 O x , wherein M 1 represents a transition metal element, and x represents a positive real number; and
a metal compound (B1) capable of adsorbing carbon diox

Assignees

• Sekisui Chemical Co Ltd

Inventors

• Dasanayake Aluthge Rasika
• Shinmei Kenichi
• YAGIHASHI Noritoshi
• NISHIYAMA Haruka
• Mori Taiyou

Classifications

• B01J35/40

  characterised by dimensions, e.g. grain size (in a colloidal state B01J35/23; crystallite size B01J35/77) · CPC title

• B01J23/745

  Iron · CPC title

• B01D2255/1021

  Platinum · CPC title

• B01D2255/2065

  Cerium · CPC title

• Y02P20/151

  Reduction of greenhouse gas [GHG] emissions, e.g. CO2 · CPC title