Patent ID: 11946150
Assignee: KABUSHIKI KAISHA TOSHIBA
Field: Surface technology, coating (Chemistry)
Classification: CPC C  Y | IPC C

Claim 0:
1. An electrochemical reaction method, comprising:
supplying gas containing carbon dioxide to a gas supply flow path connected to an inlet port of a first flow path in an electrochemical reaction cell so that the gas is in contact with a reduction electrode, and supplying an electrolytic solution containing water to a liquid supply flow path connected to an inlet port of a second flow path in the electrochemical reaction cell so that the electrolytic solution is in contact with an oxidation electrode, wherein the electrochemical reaction cell comprises the reduction electrode, the oxidation electrode, the first flow path arranged to face the reduction electrode, the second flow path arranged to face the oxidation electrode, and a diaphragm provided between the reduction electrode and the oxidation electrode;
applying a voltage from a power supply connected to the reduction electrode and the oxidation electrode, to reduce carbon dioxide and thus produce a carbon compound, and to oxidize water and thus produce oxygen;
discharging the carbon compound from a first gas and liquid discharge flow path connected to an outlet port of the first flow path, and oxygen from a second gas and liquid discharge flow path connected to an outlet port of the second flow path;
detecting continuously at least one of a voltage value and a current value of a current flowing between the reduction electrode and the oxidation electrode to obtain a detection signal indicating an amount and a kind of a substance produced at the reduction electrode; and
regulating a pressure in the first flow path of the electrochemical reaction cell by a first pressure regulator provided in the first gas and liquid discharge flow path based on the detection signal to control the amount and the kind of the substance produced at the reduction electrode so that the pressure in the first flow path becomes 0.1 MPa or more and 6.4 MPa or less when the detection signal does not satisfy a request criterion.