Carbon Dioxide Electrolysis Device and Method

Abstract

Provided is a carbon dioxide electrolysis device including: a carbon dioxide electrolysis cell including an anode, a cathode, an electrolyte, and a membrane disposed between the anode and the cathode. The carbon dioxide electrolysis device further includes; a supply line configured to supply gaseous carbon dioxide and water vapor to the cathode; and a discharge line configured to discharge, into the outside of the carbon dioxide electrolysis cell, the water vapor and a product produced by the electrolysis reaction of the gaseous carbon dioxide inside the carbon dioxide electrolysis cell, wherein the discharge line includes a condensation part configured to condense the water vapor discharged through the discharge line.

1 . A carbon dioxide electrolysis device, comprising:
 a carbon dioxide electrolysis cell including an anode, a cathode, an electrolyte, and a membrane disposed between the anode and the cathode;   a supply line configured to supply gaseous carbon dioxide and water vapor to the cathode; and   a discharge line configured to discharge, into the outside of the carbon dioxide electrolysis cell, the water vapor and a product produced by an electrolysis reaction of the gaseous carbon dioxide inside the carbon dioxide electrolysis cell,   wherein the discharge line comprises a condensation part configured to condense the water vapor discharged through the discharge line.   
     
     
         2 . The carbon dioxide electrolysis device of  claim 1 , wherein the supply line is configured to supply the gaseous carbon dioxide while the supply line comprises the water vapor. 
     
     
         3 . The carbon dioxide electrolysis device of  claim 1 , wherein the water vapor supplied through the supply line has a temperature of 40° C. to 60° C. 
     
     
         4 . The carbon dioxide electrolysis device of  claim 1 , wherein the condensation part is exposed to the outside of the carbon dioxide electrolysis cell. 
     
     
         5 . The carbon dioxide electrolysis device of  claim 1 , wherein the condensation part comprises a storage part configured to store water formed by condensing the water vapor discharged through the discharge line. 
     
     
         6 . The carbon dioxide electrolysis device of  claim 1 , wherein the discharge line comprises:
 a first line configured to transfer the product and the water vapor discharged through the discharge line to the condensation part; and   a second line configured to discharge the product from the condensation part into the outside of the carbon dioxide electrolysis cell.   
     
     
         7 . The carbon dioxide electrolysis device of  claim 6 , wherein the condensation part is connected so that a step is formed between the first line and the second line. 
     
     
         8 . The carbon dioxide electrolysis device of  claim 7 , wherein the second line is disposed higher than the first line by the step. 
     
     
         9 . A method for performing carbon dioxide electrolysis, comprising:
 (S1) supplying gaseous carbon dioxide and water vapor to a cathode of a carbon dioxide electrolysis cell including an anode, the cathode, an electrolyte, and a membrane;   (S2) electrolyzing the gaseous carbon dioxide supplied to the cathode;   (S3) discharging, into the outside of the carbon dioxide electrolysis cell, the water vapor and a product produced by the electrolyzing; and   (S4) condensing the discharged water vapor.   
     
     
         10 . The method of  claim 9 , wherein water formed by condensing the discharged water vapor dissolves a salt produced from the electrolyte by the electrolyzing. 
     
     
         11 . The method of  claim 10 , wherein the salt is produced by a reaction of the electrolyte with the supplied gaseous carbon dioxide. 
     
     
         12 . The method of  claim 10 , wherein the salt is KHCO 3  and K 2 CO 3 .