Carbon dioxide utilization system, and complex power generation system using the same

Patent metadata

Field	Value
Publication number	US-2021005911-A1
Application number	US-201916976604-A
Country	US
Kind code	A1
Filing date	Mar 13, 2019
Priority date	Mar 19, 2018
Publication date	Jan 7, 2021
Grant date	—

Abstract

Disclosed is a carbon dioxide utilization system capable of recharging and undergoing reactions. The system includes a cathode unit provided with a first aqueous solution accommodated in a first accommodation space, and a cathode at least a part of which is submerged in the first aqueous solution; an anode unit provided with an alkaline second aqueous solution accommodated in a second accommodation space, and a metal anode at least a part of which is submerged in the second aqueous solution; and a connection unit provided with a connection channel connecting the first and second accommodation spaces in open communication, and a porous ion transfer member, disposed in the connection channel, for blocking the movement of the first and second aqueous solutions but allowing the movement of ions.

First claim

1 . A carbon dioxide utilization system comprising:
a cathode unit including a first accommodation space, a first aqueous solution, and a cathode at least partially submerged in the first aqueous solution; an anode unit including a second accommodation space, a second aqueous solution which is basic, and a metal anode at least partially submerged in the second aqueous solution; and a connection unit configured to connect the cathode unit and the anode unit, wherein carbon dioxide introduced into the first aqueous solution is captured as a bicarbonate ion and produces a hydrogen ion, and the hydrogen ion reacts with an electron of the cathode to produce hydrogen.

2 . The carbon dioxide utilization system of claim 1 , wherein the anode is made of aluminum (Al) or zinc (Zn).

3 . The carbon dioxide utilization system of claim 1 , wherein the connection unit is a salt bridge.

4 . The carbon dioxide utilization system of claim 3 , wherein a solution inside the salt bridge contains sodium ions.

5 . The carbon dioxide utilization system of claim 1 , wherein the connection unit is disposed between the first accommodation space and the second accommodation space and is a porous ion transfer member which blocks the movement of the first aqueous solution and the second aqueous solution and allows the movement of ions.

6 . The carbon dioxide utilization system of claim 5 , wherein the ion transfer member is made of glass.

7 . The carbon dioxide utilization system of claim 5 , wherein a pore formed in the ion transfer member has a size of 40 to 90 microns, 15 to 40 microns, 5 to 15 microns, or 1 to 2 microns.

8 . The carbon dioxide utilization system of claim 1 , wherein the first aqueous solution and the second aqueous solution are aqueous potassium hydroxide solutions, and the connection unit is disposed between the first accommodation space and the second accommodation space and is an ion transfer member which blocks the movement of the first aqueous solution and the second aqueous solution and allows the movement of potassium ions.

9 . The carbon dioxide utilization system of claim 1 , wherein the first aqueous solution and the second aqueous solution are aqueous potassium hydroxide solutions, and the connection unit is disposed between the first accommodation space and the second accommodation space and is an ion transfer member which blocks the movement of the first aqueous solution and the second aqueous solution and allows the movement of hydroxyl ions.

10 . The carbon dioxide utilization system of claim 1 , wherein the cathode unit includes a first outlet configured to discharge the produced hydrogen, and the first outlet is positioned above a water surface of the first aqueous solution.

11 . The carbon dioxide utilization system of claim 1 , further comprising a carbon dioxide treatment unit in communication with the first accommodation space and the first aqueous solution and including a first connection pipe,
wherein the carbon dioxide treatment unit does not allow non-ionized carbon dioxide of the introduced carbon dioxide to be supplied to the cathode unit.

12 . The carbon dioxide utilization system of claim 11 , wherein the carbon dioxide treatment unit allows the non-ionized carbon dioxide to be separated using a difference in specific gravity with the first aqueous solution in the carbon dioxide treatment unit.

13 . The carbon dioxide utilization system of claim 11 , wherein the carbon dioxide treatment unit allows the non-ionized carbon dioxide to be collected above a water surface of the first aqueous solution in the carbon dioxide treatment unit.

14 . The carbon dioxide utilization system of claim 11 , wherein the carbon dioxide treatment unit includes an inlet positioned below a water surface of the first aqueous solution in the carbon dioxide treatment unit and configured to introduce carbon dioxide, and
the first connection pipe is positioned below the inlet.

15 . The carbon dioxide utilization system of claim 11 , wherein the carbon dioxide treatment unit includes a second outlet positioned above a water surface of the first aqueous solution in the carbon dioxide treatment unit and configured to discharge the non-ionized carbon dioxide.

16 . The carbon dioxide utilization system of claim 11 , wherein the carbon dioxide treatment unit further includes a carbon dioxide circulation supply unit configured to supply the non-ionized carbon dioxide separated from the first aqueous solution of the first accommodation space to the first aqueous solution in the carbon dioxide treatment unit.

17 . A carbon dioxide utilization system comprising:
a reaction space which accommodates an aqueous solution; a cathode at least partially submerged in the aqueous solution in the reaction space; and a metal anode at least partially submerged in the aqueous solution in the reaction space, wherein carbon dioxide introduced into the aqueous solution is captured as a bicarbonate ion and produces a hydrogen ion, and the hydrogen ion reacts with an electron of the cathode to produce hydrogen.

18 . The carbon dioxide utilization system of claim 17 , wherein the anode is made of vanadium (V), chromium (Cr), manganese (Mn), iron (Fe), cobalt (Co), nickel (Ni), copper (Cu), aluminum (Al), or zinc (Zn).

19 . The carbon dioxide utilization system of claim 17 , wherein the reaction space includes a first outlet configured to discharge the produced hydrogen, and the first outlet is positioned above a water surface of the aqueous solution.

20 . The carbon dioxide utilization system of claim 17 , further comprising a carbon dioxide treatment unit in communication with the reaction space and the aqueous solution and including a first connection pipe,
wherein the carbon dioxide treatment unit does not allow non-ionized carbon dioxide of the introduced carbon dioxide to be supplied to the reaction space.

21 . The carbon dioxide utilization system of claim 20 , wherein the carbon dioxide treatment unit allows the non-ionized carbon dioxide to be separated using a difference in specific gravity with the aqueous solution in the carbon dioxide treatment unit.

22 . The carbon dioxide utilization system of claim 20 , wherein the carbon dioxide treatment unit allows the non-ionized carbon dioxide to be collected above a water surface of the aqueous solution in the carbon dioxide treatment unit.

23 . The carbon dioxide utilization system of claim 20 , wherein the carbon dioxide treatment unit includes an inlet positioned below a water surface of the aqueous solution in the carbon dioxide treatment unit and configured to introduce carbon dioxide, and
the first connection pipe is positioned below the inlet.

24 . The carbon dioxide utilization system of claim 20 , wherein the carbon dioxide treatment unit includes a second outlet positioned above a water surface of the aqueous solution in the carbon dioxide treatment unit and configured to discharge the non-ionized carbon dioxide.

25 . The carbon dioxide utilization system of claim 20 , wherein the carbon dioxide treatment unit further includes a carbon dioxide circulation supply unit configured to supply the non-ionized carbon dioxide separated from the aqueous solution of the reaction space to the aqueous solution in the carbon dioxide treatment unit.

26 . A complex power generation system comprising:
the carbon dioxide utilization system of cl

Assignees

• Ulsan Nat Inst Science & Tech Unist

Inventors

• Kim Guntae
• Kim Changmin
• Kim Jeongwon

Classifications

• H01M2008/1293

  Fuel cells with solid oxide electrolytes · CPC title

• H01M16/003

  of fuel cells with other electrochemical devices, e.g. capacitors, electrolysers · CPC title

• H01M8/0668

  Removal of carbon monoxide or carbon dioxide · CPC title

• H01M8/0618

  Reforming processes, e.g. autothermal, partial oxidation or steam reforming · CPC title

• H01M8/0612

  from carbon-containing material · CPC title