Electrolysis cell unit, electrolysis cell device, hydrocarbon production system, and production method and use method of electrolysis cell unit

An electrolysis cell unit comprising at least:

• an electrolysis cell in which an electrode layer and a counter electrode layer are formed with an electrolyte layer interposed therebetween;
• and
• a discharge path configured to discharge hydrogen generated in the electrode layer,
• wherein the electrolysis cell is formed with the electrode layer having a thickness of 1 to 100 μm on one surface of a support,
• wherein a gas flow path is provided along another surface of the support,
• wherein a plurality of through holes are provided to penetrate the support from the one surface to the other surface of the support,
• wherein the gas flow path forms an electrode layer-side gas supply path configured to supply water and carbon dioxide to the electrode layer and the gas flow path acts as the discharge path configured to discharge the hydrogen generated in the electrode layer, and
• wherein a reverse water-gas shift reaction unit, configured to generate carbon monoxide using the carbon dioxide and the hydrogen by a reverse water-gas shift reaction, is provided in at least a portion of the discharge path.