| 摘要 |
In a process for producing hydrogen according to the present invention, hydrogen is produced under conditions where hydrogen recovery rate defined by the following equation is in the range of 60% to 99%: <?in-line-formulae description="In-line Formulae" end="lead"?>Hydrogen recovery rate=100x{A/(A+B<?in-line-formulae description="In-line Formulae" end="tail"?> wherein A denotes the amount of hydrogen that passes through the permselective membrane (the amount of permeated hydrogen) [ml/min], and B denotes the amount of hydrogen that does not pass through the permselective membrane (the amount of non-permeated hydrogen) [ml/min], and where alpha defined by the following equation is at least 0.6: <?in-line-formulae description="In-line Formulae" end="lead"?>alpha={(CO<SUB>2</SUB>)/(CO)<SUP>2</SUP>}/K <?in-line-formulae description="In-line Formulae" end="tail"?> wherein (CO<SUB>2</SUB>) denotes the partial pressure of carbon dioxide at the gas outlet of the reactor tube, (CO) denotes the partial pressure of carbon monoxide, and K denotes the equilibrium constant of the disproportionation reaction of carbon monoxide at the internal temperature of the reactor.
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