| 摘要 |
PURPOSE: A manufacturing method of hydrogen by water pyrolysis is provided to improve economical characteristic of water pyrolysis-based hydrogen production by increasing the productivity of hydrogen. CONSTITUTION: A manufacturing method of hydrogen by water pyrolysis includes the following steps: solid acid or one or more mixtures selected from solid acid, metals, and electrolytes are arranged in a reactor made of a heat resistance and pressure resistance material containing 70% or more of iron; the internal temperature of the reactor is maintained at the boiling point of water or less, and water or vapor is injected into the reactor such that the solid acid absorbs water; the water is pyrolyzed under 500 to 1500 K and 0.5 to 100 atm to generate hydrogen; and the internal temperature of the reactor is reduced to the boiling point of the water or less. The metals are one, a mixture, or an alloy selected from a group including aluminum, zinc, iron, cobalt, manganese, chromium, and nickel. [Reference numerals] (AA) Heating wire
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