Carbon dioxide electrolytic device

Patent metadata

Field	Value
Publication number	US-12553140-B2
Application number	US-202217901905-A
Country	US
Kind code	B2
Filing date	Sep 2, 2022
Priority date	Mar 14, 2022
Publication date	Feb 17, 2026
Grant date	Feb 17, 2026

Abstract

A carbon dioxide electrolytic device in an embodiment includes: an electrochemical reaction cell including: a first accommodation part that accommodates gas or a first electrolytic solution containing CO 2 ; a second accommodation part that accommodates a second electrolytic solution containing H 2 O; a diaphragm provided between the first and second accommodation parts; a cathode that is in contact with the gas or the first electrolytic solution; and an anode that is in contact with the second electrolytic solution; a first supply part that supplies the gas or the first electrolytic solution to the first accommodation part; a second supply part that supplies the second electrolytic solution to the second accommodation part; and a carbon dioxide separation part that is connected to a discharge portion of a discharge containing O 2 and CO 2 from the second accommodation part and includes a cryogenic separation device to separate CO 2 from a gas component in the discharge.

First claim

What is claimed is:

1 . A carbon dioxide electrolytic device, comprising:
an electrochemical reaction cell including: a first accommodation part configured to accommodate gas containing carbon dioxide or a first electrolytic solution containing carbon dioxide; a second accommodation part configured to accommodate a second electrolytic solution containing water; a diaphragm provided between the first accommodation part and the second accommodation part; a cathode arranged to be in contact with the gas or the first electrolytic solution and configured to reduce carbon dioxide to produce a carbon compound; and an anode arranged to be in contact with the second electrolytic solution and configured to oxidize water to produce oxygen; a first supply part to supply the gas or the first electrolytic solution to the first accommodation part; a second supply part to supply the second electrolytic solution to the second accommodation part; a first carbon dioxide separation part that is connected to a discharge portion to discharge a discharge containing oxygen and carbon dioxide from the second accommodation part and includes a cryogenic separation device to separate the carbon dioxide from a gas component in the discharge; and a cooling part configured to cool a cooling water for cooling at least a part of the electrochemical reaction cell by using, as a cooling medium, a gas, liquid, or solid mainly containing the carbon dioxide separated in the cryogenic separation device, or a residual gas from which the carbon dioxide has been separated in the cryogenic separation device.

2 . The device according to claim 1 , wherein
the first carbon dioxide separation part includes a carbon dioxide resending flow path that resends the separated carbon dioxide to the first accommodation part, the first supply part, or a carbon dioxide generation source that supplies the carbon dioxide to the first supply part.

3 . The device according to claim 1 , further comprising:
a second carbon dioxide separation part that is connected to a discharge portion to discharge a discharge from the first accommodation part and configured to separate carbon dioxide from a gas component in the discharge.

4 . The device according to claim 1 , further comprising:
a valuable material production part that is connected to a discharge portion to discharge a discharge containing the carbon compound from the first accommodation part and configured to synthesize a valuable material by using at least a part of the discharge gas a raw material.

5 . The device according to claim 4 , wherein
the valuable material production part includes a fermentation reaction device configured to synthesize a fuel or a chemical substance as the valuable material.

6 . The device according to claim 4 , further comprising:
a second cooling part configured to cool a part of the valuable material production part by using the cooling medium.

Assignees

• Toshiba Kk

Inventors

• Mikoshiba Satoshi
• Kitagawa Ryota
• Ono Akihiko
• Yamagiwa Masakazu
• Kofuji Yusuke
• Kiyota Yasuhiro

Classifications

• C25B1/04 Primary

  by electrolysis of water · CPC title

• C12M43/00

  Combinations of bioreactors or fermenters with other apparatus · CPC title

• C25B9/19 Primary

  with diaphragms · CPC title

• C25B3/26

  of carbon dioxide · CPC title

• C25B1/23

  Carbon monoxide or syngas · CPC title