Tubular penetration electrode-based flow cell reaction system and operation method

A tubular penetration electrode-based flow cell reaction system, comprising:

• a flow cell reactor internally provided with a cathode chamber and an anode chamber separated by a proton exchange membrane, wherein the cathode chamber is connected with a reaction gas input tube, a cathode electrolyte input tube and a gas-liquid output tube which are respectively used to input a reaction gas and a cathode electrolyte and output a post-reaction gas-liquid product, the cathode chamber is internally provided with a gas duct assembly and a plurality of multi-channel tubular penetration electrodes, an inlet of the gas duct assembly is connected with an outlet of the reaction gas input tube, a plurality of outlets are disposed on the gas duct assembly to correspondingly connect with inlets of the plurality of multi-channel tubular penetration electrodes, and outlets of the multi-channel tubular penetration electrodes are closed;
• the anode chamber is connected with an anode electrolyte input tube for inputting an anode electrolyte, the anode chamber is internally provided with an anode electrode, and the anode electrode and the multi-channel tubular penetration electrodes are respectively connected to both ends of a power source;
• the plurality of multi-channel tubular penetration electrodes are arranged linearly or distributed in an array;
• the multi-channel tubular penetration electrodes are made of a single metal material by phase inversion and sintering method and have a plurality of channels with one end closed for gas transfer and diffusion and tube walls being porous layered wall structure;
• or, on the basis of the single metal material, catalytic active sites of a surface of the electrodes are regulated by surface reconstruction;
• the surface reconstruction comprises doping carbon nanotube, introducing ZIF material, doping another single metal or doping another heteroatom into a single metal substrate, or performing surface modification on the multi-channel tubular penetration electrodes of the single metal substrate by in-situ electrochemical etching or in-situ wet-chemical method;
• further comprising a gas-liquid separation device for performing gas-liquid separation on a post-reaction gas-liquid mixture output by the cathode chamber, wherein the gas-liquid separation device is provided with a gas-liquid inlet, a gas outlet, and a liquid outlet, the gas-liquid inlet is connected with an outlet of the gas-liquid output tube, the gas outlet is connected with the reaction gas input tube through a first connection tube and then connected with the inlet of the gas duct assembly, and the liquid outlet is connected with the cathode electrolyte input tube through a second connection tube and then connected with the cathode chamber;
• a first circulating pump, a gas detection point, and a first three-way valve are disposed sequentially on the first connection tube, and another outlet of the first three-way valve is connected with a gas product collection end;
• a second circulating pump, a liquid detection point, and a second three-way valve are disposed sequentially on the second connection tube, and another outlet of the second three-way valve is connected with a liquid product collection end;
• the reaction gas comprises one of CO, CO2 N2 nitrogen oxide, a mixture of CO2 and N2, and a mixture of CO2 and nitrogen oxide;
• the anode electrolyte and the cathode electrolyte are an acid electrolyte or alkaline electrolyte.