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Electrochemical reaction device

  • US 10,458,024 B2
  • Filed: 09/13/2017
  • Issued: 10/29/2019
  • Est. Priority Date: 10/27/2016
  • Status: Active Grant
First Claim
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1. An electrochemical reaction device comprising:

  • a reaction vessel comprising a first accommodating part configured to accommodate a first electrolytic solution containing carbon dioxide, a second accommodating part configured to accommodate a second electrolytic solution containing water, a first inflow port for introducing the first electrolytic solution containing the carbon dioxide to the first accommodating part, a first outflow port for discharging the first electrolytic solution containing a first gas component from the first accommodating part, a second inflow port for introducing the second electrolytic solution to the second accommodating part, and a second outflow port for discharging the second electrolytic solution containing a second gas component from the second accommodating part;

    a reduction electrode disposed in the first accommodating part;

    an oxidation electrode disposed in the second accommodating part;

    a power supply connected to the reduction electrode and the oxidation electrode;

    a first gas/liquid separating unit configured to separate the first electrolytic solution and the first gas component containing a gas reduction product and the carbon dioxide, and comprising a third inflow port for introducing the first electrolytic solution containing the first gas component discharged from the first outflow port, a third outflow port for discharging the first gas component separated from the first electrolytic solution, and a fourth outflow port for discharging the first electrolytic solution from which the first gas component is separated;

    a first gas/liquid mixing unit configured to mix the first gas component with the first electrolytic solution, and comprising a fourth inflow port for introducing the first electrolytic solution discharged from the fourth outflow port, a fifth inflow port for introducing the first gas component discharged from the third outflow port, a fifth outflow port for discharging the first electrolytic solution in which the carbon dioxide is dissolved, and a sixth outflow port for taking out the gas reduction product not dissolving in the first electrolytic solution; and

    a second gas/liquid mixing unit configured to dissolve carbon dioxide in the first electrolytic solution, and comprising a sixth inflow port for introducing the first electrolytic solution discharged from the fifth outflow port, a seventh inflow port for introducing the first electrolytic solution from a first electrolytic solution tank, an eighth inflow port for injecting carbon dioxide from a carbon dioxide tank into the first electrolytic solution introduced from the sixth inflow port and the seventh inflow port, and a seventh outflow port for sending the first electrolytic solution in which the carbon dioxide dissolves to the first inflow port.

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