Carbon dioxide reaction apparatus

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.

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.