Carbon dioxide reaction apparatus

Patent metadata

Field	Value
Publication number	US-2021292925-A1
Application number	US-202017009221-A
Country	US
Kind code	A1
Filing date	Sep 1, 2020
Priority date	Mar 23, 2020
Publication date	Sep 23, 2021
Grant date	—

Abstract

There is provided a carbon dioxide reaction apparatus capable of increasing the use efficiency of CO2. A carbon dioxide reaction apparatus 1 in an embodiment includes: an electrochemical reaction cell 5 including a first accommodation part 2 that accommodates gas containing CO2 or a first electrolytic solution containing CO2, a second accommodation part 3 that accommodates a second electrolytic solution containing H2O, a diaphragm 4 provided between the first accommodation part 2 and the second accommodation part 3, a cathode in contact with the gas or the first electrolytic solution, and an anode in contact with the second electrolytic solution; a first supply part 6 that supplies the gas or the first electrolytic solution to the first accommodation part 2; a second supply part 7 that supplies the second electrolytic solution to the second accommodation part 3; and a carbon dioxide separation part 8 connected to a discharge portion discharging a discharge containing O2 and CO2 from the second accommodation part 3, and the carbon dioxide separation part 8 separates CO2 from a gas component in the discharge.

First claim

What is claimed is:

1 . A carbon dioxide reaction apparatus, comprising:
an electrochemical reaction cell including,
a first accommodation part that accommodates gas containing carbon dioxide or a first electrolytic solution containing carbon dioxide,
a second accommodation part that accommodates 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 to reduce carbon dioxide to produce a carbon compound, and
an anode arranged to be in contact with the second electrolytic solution to oxidize water to produce oxygen;
a first supply mechanism that supplies the gas or the first electrolytic solution to the first accommodation part; a second supply mechanism that supplies the second electrolytic solution to the second accommodation part; and a first carbon dioxide separator that separates carbon dioxide from a gas component in a second accommodation discharge discharged from the second accommodation part, the second accommodation discharge containing oxygen and carbon dioxide.

2 . The apparatus according to claim 1 , further comprising
a carbon dioxide generation source that supplies the carbon dioxide to the first supply mechanism, wherein the first carbon dioxide separator includes a carbon dioxide resending flow path that resends the separated carbon dioxide to the first accommodation part in the electrochemical reaction cell, the first supply mechanism, or the carbon dioxide generation source.

3 . The apparatus according to claim 1 , further comprising:
a second carbon dioxide separator that separates carbon dioxide from a gas component in a first accommodation discharge discharged from the first accommodation part.

4 . The apparatus according to claim 1 , wherein
the first carbon dioxide separator includes a chemical absorption device of carbon dioxide, a physical adsorption and separation device of carbon dioxide, a membrane separation device of carbon dioxide, or a combustion or oxidation device.

5 . The apparatus according to claim 1 , further comprising:
a hydrogen separator that separates hydrogen from a gas component in a first accommodation discharge discharged from the first accommodation part.

6 . The apparatus according to claim 5 , wherein
the hydrogen separator includes a chemical absorption device of hydrogen, a physical adsorption and separation device of hydrogen, a membrane separation device of hydrogen, a low-temperature separation device of hydrogen, or a combustion or oxidation device.

7 . The apparatus according to claim 1 , further comprising:
a valuable material production device that synthesizes a valuable material by using at least a part of a first accommodation discharge discharged from the first accommodation part as a raw material, a first accommodation discharge containing the carbon compound.

8 . The apparatus according to claim 7 , wherein
the valuable material production device includes a fermentation reaction device that syntheses a fuel or a chemical substance as the valuable material.

9 . A carbon dioxide reaction apparatus, comprising:
an electrochemical reaction cell including,
a first accommodation part that accommodates gas containing carbon dioxide or a first electrolytic solution containing carbon dioxide,
a second accommodation part that accommodates 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 to reduce carbon dioxide to produce a carbon compound, and
an anode arranged to be in contact with the second electrolytic solution to oxidize water to produce oxygen;
a first supply mechanism that supplies the gas or the first electrolytic solution to the first accommodation part; a second supply mechanism that supplies the second electrolytic solution to the second accommodation part; and a carbon dioxide resending flow path that resends a second accommodation discharge discharged from the second accommodation part, the second accommodation discharge containing oxygen and carbon dioxide, to the first accommodation part in the electrochemical reaction cell, the first supply mechanism, or a carbon dioxide generation source that supplies the carbon dioxide to the first supply mechanism.

10 . The apparatus according to claim 9 , further comprising:
a valuable material production device that synthesizes a valuable material by using at least a part of the first accommodation discharge discharged from the first accommodation part as a raw material, the first accommodation discharge containing the carbon compound.

11 . The apparatus according to claim 10 , wherein
the valuable material production device includes a fermentation reaction device that syntheses a fuel or a chemical substance as the valuable material.

Assignees

• Toshiba Kk

Inventors

• Mikoshiba Satoshi
• MOTOSHIGE Asahi
• Kitagawa Ryota
• Ono Akihiko
• Kofuji Yusuke
• Kudo Yuki

Classifications

• C25B15/08 Primary

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

• C25B15/00

  Operating or servicing cells · CPC title

• C25B1/00 Primary

  Electrolytic production of inorganic compounds or non-metals · CPC title

• Y02E60/36

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

• C25B15/083

  Separating products · CPC title