Verfahren zum Betrieb eines Festoxidbrennstoffzellengenerators mit Lanthanmanganit-Elektrode

摘要

A method for operating a power generator in which a solid oxide fuel cell is used as a power-generating element and an air electrode of the solid oxide fuel cell is composed of lanthanum manganite, the method involving the step of setting a heating rate and a cooling rate at least in a temperature range of 800 DEG C to 900 DEG C at not less than 3 DEG C/min. when the fuel cell is heated up to an operating temperature at the time of starting the power generator and when the fuel cell is cooled from the operating temperature at the time of stopping the power generator. Alternatively, the method involves the step of setting a partial pressure of oxygen, at least in a temperature range of 800 DEG C to 900 DEG C, in an atmosphere to which the air electrode is exposed, to at not less than 10<-><1><5> atms but not more than 10<-><1> atms when the fuel cell is heated up to an operating temperature at the time of starting the power generator and when the fuel cell is cooled from the operating temperature at the time of stopping the power generator.