| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a small-sized catalytic process for hydrogen production to replace of steam reforming reaction, small in energy consumption and for producing high purity hydrogen containing no CO and compatible with a fuel production process for a solid high molecular fuel cell. SOLUTION: A Ni/SiO2 catalyst is arranged on a Pd-Ag film in a reactors A and B. In the initial operation, a city gas and combustion air are introduced into the reactor A respectively from V1 and V2 to combust and exhausted from V5. Steam is generated by using the resultant heat by the combustion and the sweep steam is introduced into a hydrogen manifold. After the introduction of the sweep steam, the city gas is introduced into the reactor B from V2 to cause the methane decomposition reaction to obtain gaseous hydrogen and carbon. The resultant gaseous hydrogen in the reactor B penetrated through the Ps-Ag film and is discharged with steam from the hydrogen manifold. When the carbon generation in the reactor B reaches a certain stage, V2 is closed, V4 and V6 are opened and the combustion reaction of the carbon is performed and in the reaction A, V4 is closed, the introduction of the combustion air is stopped and successively V5 is closed to perform the methane decomposition reaction with the city gas from V1. After that, the reactors A and B are switched to each other to produce hydrogen.</p> |
