| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a hydrogen exhaust device of a fuel cell system enhancing performance and stability of a fuel cell stack by decreasing the hydrogen concentration of hydrogen-containing exhaust gas (anode offgas) exhausted from a hydrogen exhaust line of a fuel cell stack. <P>SOLUTION: An exhaust device 100 is connected to a hydrogen exhaust line 18 installed in a fuel electrode 12, anode offgas is diluted by sucking in air to decrease the hydrogen concentration of the anode offgas, a catalytic combustion device or a burner is connected to an exhaust line 28 of the exhaust device 100 and the contents of hydrogen in the anode offgas is decreased. The exhaust line 28 of the exhaust device, a catalytic combustion device exhaust line, or a burner exhaust line is connected to a humidifier 26, produced water is supplied to an air electrode 20, the humidifying amount of the air electrode 20 is increased, and anode offgas is diluted with air to decrease hydrogen concentration. <P>COPYRIGHT: (C)2010,JPO&INPIT |
