CARBON MONOXIDE REDUCING DEVICE AND FUEL CELL SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a carbon monoxide reducing device capable of reducing carbon monoxide at high performance with a small structure and to provide a small fuel cell system excellent in durability. SOLUTION: This carbon monoxide reducing device 5 is stacked with multiple carbon monoxide reduction sections 51-54 in the flowing direction of the modified gas. Coolant passage units are provided in the carbon monoxide reduction sections 51-54 so that the passage resistances of the coolant flowing in the coolant passage units are made different, or multiple coolant passage units are stacked in a carbon monoxide reducing device 50 so that the passage resistances of the coolant flowing in the coolant passage units are made different.