| 摘要 |
PURPOSE:Methanol or a methanol and steam mixed gas is decomposed, and the resultant hydrogen-containing gas is passed through a Pd alloy membrane to simply produce hydrogen of high purity in low costs. CONSTITUTION:Methanol only, or a methanol-steam 1mol : 5mol mixture gas is passed through a catalyst of Cu, Cr or Mn oxides at relatively low temperature of 250-500 deg.C to effect decomposition into H2 and CO in case of the former, or H2 and CO2 in case of the latter. The resultant gas mix is passed through a Pd alloy membrane at high temperature at less than 50kg/cm<2>G pressure to effect purification. Since the Pd alloy membrane selectively passes only H2 gas, a hydrogen gas as high as more than 99.999% in purity is simply obtained in low costs.
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