Electrochemical reaction device

An electrochemical reaction device, comprising:

• a first anode to oxidize a first substance;
• a first flow path facing the first anode and through which a liquid containing the first substance flows;
• a first cathode to reduce a second substance;
• a second flow path facing the first cathode and through which a gas containing the second substance flows;
• and
• a first porous separator provided between the first anode and the first cathode,
• a second anode to oxidize the first substance;
• a third flow path facing the second anode and through which the liquid flows;
• a second cathode to reduce the second substance;
• a fourth flow path facing the second cathode and through which the gas flows;
• a second porous separator provided between the second anode and the second cathode;
• a first flow path layer having an inlet and an outlet;
• a second flow path layer provided between the first cathode and the first flow path layer and having a first region and a second region, the first region being apart from the first flow path layer, the second region being bent so as to protrude toward the first flow path layer from the first region, the second region having a first opening communicating with the inlet and a second opening communicating with the outlet, and the first region having a third opening through the second flow path layer;
• and
• a third flow path layer provided between the first anode and the second cathode and having a third region and a fourth region, the third region being apart from the first anode, and the fourth region being bent so as to protrude toward the first anode from the third region, the third region having a fourth opening through the third flow path layer, and the fourth region having a fifth opening through the third flow path layer,
• wherein:
• the third region and the second cathode define the first flow path therebetween;
• the first cathode and the second region define the second flow path therebetween;
• a thickness of the first porous separator is 1 μm or more and 500 μm or less;
• a average fine pore size of the first porous separator is larger than 0.008 μm and smaller than 0.45 μm;
• a porosity of the first porous separator is higher than 0.5.

An electrochemical reaction device, comprising:

• an anode to oxidize a first substance;
• a first flow path facing the anode and through which a liquid containing the first substance flows;
• a cathode to reduce a second substance;
• a second flow path facing the cathode and through which a gas containing the second substance flows;
• a first flow path layer having an inlet and an outlet;
• a second flow path layer provided between the first flow path layer and the cathode and having a first region and a second region, the first region being apart from the first flow path layer, the second region being bent so as to protrude toward the first flow path layer from the first region, the second region having a first opening communicating with the inlet and a second opening communicating with the outlet;
• and
• a porous separator provided between the anode and the cathode,
• wherein the cathode and the second region define the second flow path therebetween,
• wherein a thickness of the porous separator is 1 μm or more and 500 μm or less,
• an average fine pore size of the porous separator is larger than 0.008 μm and smaller than 0.45 μm, and
• a porosity of the porous separator is higher than 0.5.