Carbon dioxide conversion apparatus and carbon dioxide conversion method

A carbon dioxide conversion apparatus comprising:

• a carbon dioxide supply part configured to capture carbon dioxide from a carbon dioxide containing gas and supply the carbon dioxide;
• a carbon dioxide electrolysis part comprising:
• a cathode chamber configured to receive the carbon dioxide from the carbon dioxide supply part and reduce the carbon dioxide to produce carbon monoxide;
• and
• an anode chamber configured to oxidize an oxidizable substance to produce oxygen and carbon dioxide;
• a carbon dioxide capture part configured to separate and capture the carbon dioxide from an oxygen-carbon dioxide containing gas to be produced in the anode chamber;
• a carbon monoxide purification part configured to purify the carbon monoxide in a carbon monoxide containing gas to be produced in the cathode chamber;
• and
• an oxidation part configured to perform a reaction between a reducing gas and a carbon dioxide containing gas, the reducing gas being discharged from the carbon monoxide purification part and containing a residual carbon monoxide, and the carbon dioxide containing gas being separated and captured in the carbon dioxide capture part and containing a residual oxygen.