| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for operating a fuel cell with which decrease of performance of the fuel cell can be prevented or restored that was caused by poisoning of carbon monoxide which may become a problem when a fuel gas made from a row material of a hydrocarbon system through reformation is used as a fuel for the fuel cell. SOLUTION: In a fuel cell which is composed of a plurality of single cells each comprising a polymer electrolyte, and an air electrode and a fuel electrode, both of which are arranged to interpose the polymer electrolyte, stacked with separator each having a gas supplying trench and a manifold part disposed between the cells, wherein a fuel gas made from a raw material gas of a hydrocarbon base through reformation and an oxidizer gas are introduced in a structure thus formed to generate dc power, carbon monoxide adsorbed on the fuel electrode is removed by performing forced degrading of output voltage of the fuel cell. Preferably, the output voltage of the above-mentioned fuel cell is reduced by an amount of 0 V to 0.3 V per a single cell. |
