| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method for producing hydrogen using supercritical water in which a hydrogen gas can be purified with high energy efficiency. <P>SOLUTION: The method for producing hydrogen includes (1) a reforming process for holding a raw material consisting of hydrocarbon compounds and supercritical water and producing a reformed gas consisting of a hydrogen gas and a remaining gas other than the hydrogen gas and (2) a hydrogen gas- purifying process having a hydrogen-absorbing step for causing the hydrogen gas contained in the reformed gas to be absorbed by a hydrogen-absorbing alloy to separate the hydrogen gas from the reformed gas, a hydrogen-desorbing step for desorbing the absorbed hydrogen gas from the hydrogen-absorbing alloy, and a heat-exchange step for exchanging heat with each other between the heat generated from the hydrogen-absorbing alloy in the hydrogen-absorbing step and the heat absorbed by the hydrogen-absorbing alloy in the hydrogen- desorbing step. Since the hydrogen-absorbing alloy absorbs hydrogen at high temperatures, etc., the energy in a supercritical state can be effectively utilized, and the energy efficiency in the whole hydrogen production can be improved. <P>COPYRIGHT: (C)2004,JPO</p> |
