Hydrogen production system and hydrogen production method

Abstract

Provided is a hydrogen production system including at least one first osmosis device, a circulation flow path, and an alkaline water electrolyzer. The at least one first osmosis device includes a semipermeable membrane which separates a first chamber to which water to be treated is supplied and a second chamber to which an alkaline aqueous solution having a higher osmotic pressure than that of the water to be treated is supplied, and which permeates water in the water to be treated from the first chamber to the second chamber. The circulation flow path is connected to the second chamber and the alkaline aqueous solution is circulated therethrough. The alkaline water electrolyzer is provided in the circulation flow path, and electrolyzes water in an alkaline aqueous solution supplied from the second chamber and produces hydrogen.

Dependencies are inferred from the claim text.