FIELD: method of separation of gases in device with ionic conductor from solid electrode. SUBSTANCE: method of separation of oxygen gas flow into gas flow enriched in oxygen and gas flow depleted in oxygen by separation of oxygen from supplied gas flow in device includes compression of supplied gas flow, separation of compressed flow into main and auxiliary parts, heating of main part of gas flow with introduction of device into separation section, supply of auxiliary part of gas flow to device cooling section near the outlet of oxygen product, withdrawal of oxygen from heated main part through membranes to sections of device separation, transfer of heat from gas flow enriched in oxygen of auxiliary part of gas flow. EFFECT: higher efficiency. 10 cl, 10 dwg, 1 tbl
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