Liquid flow electrolytic tank system and method for preparing synthesis gas through carbon dioxide electro-catalysis

The invention discloses a liquid flow electrolytic tank system and a method for preparing synthesis gas through carbon dioxide electro-catalysis. The system comprises an electrochemical reaction module, the electrochemical reaction module comprises an anode chamber, an ion exchange membrane and a cathode chamber, and the ion exchange membrane is arranged between the anode chamber and the cathode chamber; an anode catalytic electrode and anolyte are arranged in the anode chamber, and the anolyte provides H < + > for the cathode chamber through the ion exchange membrane; a cathode catalytic electrode and a cathode electrolyte are arranged in the cathode chamber, the cathode electrolyte is a solution containing bicarbonate ions (HCO3 ), and a cathode catalyst loaded on the cathode catalytic electrode is a nitrogen-doped nickel-based metal carbon nanotube material (Ni-N-CNTS). The conversion rate of CO2 can be increased by adopting the system to prepare the synthesis gas through electro-catalysis of carbon dio