Carbon dioxide recovery system

A carbon dioxide recovery system, comprising,

• an electrolytic reduction device configured to be supplied with a gas containing carbon dioxide and generate a mixed gas containing at least a producer gas containing at least one of a hydrocarbon, carbon monoxide and hydrogen, and unreacted carbon dioxide by an electrolytic reduction of the carbon dioxide;
• and
• a carbon dioxide separation device configured to separate carbon dioxide gas from the mixed gas,
• wherein the carbon dioxide separation device includes
• a carbon dioxide absorption unit configured to contact the mixed gas with an electrolytic liquid containing a compound that adsorbs and desorbs protons in an oxidation-reduction reaction to cause the carbon dioxide in the mixed gas to be adsorbed in the electrolytic liquid,
• an electrochemical cell which is partitioned into a cathode chamber and an anode chamber by a membrane electrode assembly including an electrolytic membrane and a cathode and an anode formed on either side of the electrolytic membrane and connected to a power supply,
• a first passage for flowing the electrolytic liquid from the carbon dioxide gas absorption unit to the anode chamber,
• a second passage for flowing the electrolytic liquid from the anode chamber to the cathode chamber,
• a third passage for flowing the electrolytic liquid from the cathode chamber to the carbon dioxide gas absorption unit, and
• a gas-liquid separation device provided in the second passage for separating carbon dioxide gas from the electrolytic liquid,
• the electrolytic reduction device being configured to use the carbon dioxide separated from the mixed gas in the carbon dioxide separation device as part of input material thereof.