| 摘要 |
A fuel cell power plant comprises a fuel cell stack (1) for outputting a current in accordance with a chemical reaction amount between hydrogen in hydrogen-rich gas which is supplied to an anode (1A) and oxygen which is supplied to a cathode (1C). Sensors (12, 13) detect the concentration of impurity gas contained in the hydrogen-rich gas. When the impurity gas has reached a predetermined concentration, a controller (10) adjusts the output current of the fuel cell stack (1) or the flow rate of hydrogen-rich gas supplied to the anode (1A) (S5) such that the entire amount of hydrogen supplied to the anode (1A) is expended in power generation by the fuel cell stack (1). As a result, hydrogen is removed from the anode effluent and the release of hydrogen into the atmosphere during the purging of the anode effluent can be prevented. |
