Organic hydride production apparatus and method for producing organic hydride
An organic hydride production apparatus includes: an electrolyte membrane having proton conductivity; a cathode that includes a cathode catalyst layer used to hydrogenate a hydrogenation target substance using protons to produce an organic hydride and also includes a cathode chamber; an anode that includes an anode catalyst layer used to oxidize water to produce protons and also includes an anode chamber; and a gas introduction unit that introduces, into the anolyte at a certain position, a certain gas used to remove at least one of the hydrogenation target substance and the organic hydride that have passed through the electrolyte membrane and been mixed into the anolyte.
1. An organic hydride production apparatus, comprising:
an electrolyte membrane having proton conductivity;
a cathode, provided on one side of the electrolyte membrane, said cathode comprising a cathode catalyst layer;
a cathode chamber that houses the cathode catalyst layer;
an anode, provided opposite to the one side of the electrolyte membrane, said anode comprising an anode catalyst layer;
an anode chamber that houses the anode catalyst layer and an anolyte comprising water;
a gas introduction unit for introducing into the anolyte at a predetermined position a predetermined gas;
a catholyte storage tank that stores a catholyte containing the hydrogenation target substance;
a circulation passage that connects the catholyte storage tank and the cathode; and
a separation unit that is provided in the circulation passage and separates, from the catholyte, hydrogen gas as a by-product produced in the cathode and the anolyte that has passed through the electrolyte membrane and been mixed into the catholyte,
wherein the apparatus is arranged to:
supply an organic hydrogenation target substance to the cathode and to hydrogenate the hydrogenation target substance at the cathode catalyst layer using protons to produce an organic hydride;
supply the anolyte to the anode and to oxidize the water in the anolyte at the anode catalyst layer to produce protons; and
remove at least one of the hydrogenation target substance and the organic hydride that have passed through the electrolyte membrane and been mixed into the anolyte by promoting gasification of the at least one of the hydrogenation target substance and the organic hydride through introduction of the predetermined gas at the predetermined position,
wherein the gas introduction unit is configured to cause bubbling of the anolyte using the predetermined gas so as to remove the hydrogenation target substance or the hydrogenation target substance and the organic hydride that have passed through the electrolyte membrane and been mixed into the anolyte, and
wherein the organic hydride production apparatus further comprises a decomposition unit that decomposes or adsorbs at least part of the hydrogenation target substance gasified in the predetermined gas, or decomposes or adsorbs at least part of the hydrogenation target substance and the organic hydride gasified in the predetermined gas.
2. The organic hydride production apparatus of claim 1 , further comprising:
an anolyte storage tank that stores the anolyte; and
a circulation passage that connects the anolyte storage tank and the anode,
wherein the gas introduction unit introduces the gas into the anolyte in at least one of the anode chamber, the anolyte storage tank, and the circulation passage.
3. The organic hydride production apparatus of claim 2 , wherein the gas introduction unit introduces the gas into the anolyte in the anode chamber.
4. The organic hydride production apparatus of claim 1 , wherein the predetermined gas is at least one selected from a group including air, nitrogen, argon, and helium.
5. The organic hydride production apparatus of claim 1 , wherein when discharged from the decomposition unit, a concentration of the hydrogenation target substance in the predetermined gas is a predetermined value or less.
6. The organic hydride production apparatus of claim 1 , wherein when discharged from the decomposition unit, a concentration of the hydrogenation target substance and the organic hydride gasified in the predetermined gas is a predetermined value or less.