Carbon dioxide recovery system and carbon dioxide recovery method

Abstract

A carbon dioxide recovery system that recovers carbon dioxide contained in exhaust gas discharged from a combustion device includes: a refrigerator including at least a compressor that compresses a first heat medium, a heat exchanger that cools the first heat medium compressed in the compressor, and an expander that expands the first heat medium cooled in the heat exchanger; a carbon dioxide extraction device that absorbs the carbon dioxide contained in the exhaust gas into an absorption liquid or adsorbs the above-described carbon dioxide into an adsorbent; a separator that separates carbon dioxide gas from the absorption liquid or adsorbent by the thermal energy of the first heat medium compressed in the compressor; and a liquefier that liquefies the carbon dioxide gas separated from the absorption liquid or adsorbent in the separator by the cooling energy of the first heat medium expanded in the expander.

Dependencies are inferred from the claim text.