Gas production apparatus, gas production system, steel production system, chemical manufacturing system, and gas production method with reduced carbon dioxide emission

A gas production apparatus, comprising:

• a separation and capture section configured to separate and capture a separated gas including carbon dioxide as a main component from an exhaust gas of exhaust gas equipment;
• a reaction section including reactors which are downstream of the separation and capture section, each of the reactors:
• (i) containing a reductant configured to contact the separated gas to produce carbon monoxide through a reduction reaction of carbon dioxide;
• (ii) being configured to separate at least some oxygen atoms split off from carbon dioxide in the reduction reaction;
• and (iii) having a reducing agent containing a metal oxide configured to reduce carbon dioxide as the reductant;
• a reducing gas supply section configured to supply a reducing gas containing a reducing substance configured to reduce the reducing agent oxidized by contact with carbon dioxide;
• a pressure regulating section which is downstream of the reactors and configured to regulate a pressure of the separated gas supplied to each of the reactors;
• and
• a flow regulating section which is upstream of the separation and capture section and configured to regulate a flow rate of the separated gas supplied to each of the reactors,
• wherein:
• the separation and capture section and the flow regulating section are arranged on only a single line connected to the reaction section;
• each of the reactors is connected to at least one of the separation and capture section or the reducing gas supply section;
• and
• each of the reactors is configured to:
• (i) switch between the separated gas and the reducing gas to be supplied to each of the reactors;
• or (ii) transfer the reducing agent between the reactors.