Producing carbon monoxide

Patent metadata

Field	Value
Publication number	US-12281397-B2
Application number	US-202017764380-A
Country	US
Kind code	B2
Filing date	Oct 7, 2020
Priority date	Oct 8, 2019
Publication date	Apr 22, 2025
Grant date	Apr 22, 2025

Abstract

The invention relates to a method for producing carbon monoxide, comprising the following steps:
a) humidifying an educt gas containing carbon dioxide with water, b) supplying the humidified educt gas from step a) into an electrolytic cell ( 1 ), and c) electrolyzing the humidified educt gas supplied according to step b) in the electrolytic cell ( 1 ) such that the carbon monoxide is obtained.

With the described method and with the described device ( 12 ), carbon monoxide can be produced via CO 2 electrolysis with particularly high efficiency. This is achieved with the educt gas containing carbon dioxide being humidified before the electrolysis.

First claim

The invention claimed is:

1. A method for producing carbon monoxide, comprising:
a) humidifying an educt gas containing carbon dioxide with water,
b) supplying the humidified educt gas from step a) into an electrolytic cell, and
c) electrolyzing the humidified educt gas supplied according to step b) in the electrolytic cell such that the carbon monoxide is obtained
wherein the water used for step a) is heated by the heat of a product of the electrolysis from step c).

2. The method according to claim 1 , wherein the educt gas is passed through the water in step a).

3. The method according to claim 1 , wherein the water in step a) is at a temperature within the range from 18 to 25° C.

4. The method according claim 1 , wherein the water in step a) is at a temperature within the range from 25 to 40° C.

5. The method according to claim 1 , wherein step a) is carried out in such a way that, after step a), a water content of the humidified educt gas is 2 to 6%.

6. A device for producing carbon monoxide, comprising:
an electrolytic cell having an anode and a cathode, which are separated from one another by at least one electrolyte, and a cathode space adjoining the cathode,
a supply line to the cathode space, which comprises a humidifier, and
a heating means for heating water within the humidifier by means of a product of electrolysis occurring in the electrolytic cell.

7. The method according to claim 2 , wherein the water in step a) is at a temperature within the range from 18 to 25° C.

8. The method according claim 2 , wherein the water in step a) is at a temperature within the range from 25 to 40° C.

9. The method according to claim 2 , wherein the water used for step a) is heated by the heat of a product of the electrolysis from step c).

10. The method according to claim 2 , wherein step a) is carried out in such a way that, after step a), a water content of the humidified educt gas is 2 to 6%.

11. The method according claim 3 , wherein the water in step a) is at a temperature within the range from 25 to 40° C.

12. The method according to claim 3 , wherein the water used for step a) is heated by the heat of a product of the electrolysis from step c).

13. The method according to claim 3 , wherein step a) is carried out in such a way that, after step a), a water content of the humidified educt gas is 2 to 6%.

14. The method according to claim 4 , wherein the water used for step a) is heated by the heat of a product of the electrolysis from step c).

15. The method according to claim 4 , wherein step a) is carried out in such a way that, after step a), a water content of the humidified educt gas is 2 to 6%.

16. The method according to claim 1 , wherein step a) is carried out in such a way that, after step a), a water content of the humidified educt gas is 2 to 6%.

Assignees

• Forschungszentrum Juelich Gmbh

Inventors

• Foit Severin
• Dittrich Lucy
• Eichel Rüdiger-A
• De Haart L G J

Classifications

• C25B15/08

  Supplying or removing reactants or electrolytes; Regeneration of electrolytes · CPC title

• C25B9/23

  comprising ion-exchange membranes in or on which electrode material is embedded · CPC title

• C25B9/67

  Heating or cooling means · CPC title

• C25B1/042

  by electrolysis of steam · CPC title

• Y02E60/36

  Hydrogen production from non-carbon containing sources, e.g. by water electrolysis · CPC title