| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for lowering the carbon monoxide concentration of a mixed gas containing hydrogen, carbon monoxide and oxygen while satisfying requirements for vehicle mountability, and more particularly, to provide a method for lowering the carbon monoxide at a low cost even under high-SV and high-temperature conditions. <P>SOLUTION: The method for lowering the carbon monoxide concentration of a mixed gas containing hydrogen, carbon monoxide and oxygen comprises feeding the mixed gas into a carbon monoxide removal apparatus containing a carbon monoxide concentration lowering catalyst having a transition metal element and having an adjusted carbon monoxide adsorption amount of 0.1 to 3 mL/(cat×g) at a space velocity (SV) of 15,000 to 300,000 h<SP>-1</SP>and at a temperature of 100 to 300°C. According to this method in which the carbon monoxide adsorption by the catalyst is adjusted, the carbon monoxide concentration can be efficiently lowered at a low cost even under high-SV and high-temperature conditions. <P>COPYRIGHT: (C)2004,JPO&NCIPI |
