Fuel battery power-generating device

PURPOSE:To preclude a hydrogen-oxygen type fuel battery power-generating device from CO poisoning of fuel battery furnishing at least one of the rhodium, nickel, and paradium as a catalyst activating component of a CO converter. CONSTITUTION:The temps. of a natural gas 1 and water 2 are raised by a heater 3, and they are desulfurized by a desulfurizer 4. The CO in the gas modified by a modifier 5 is removed by the first converter 7 and second converter 9. The former 7 uses, for example, Fe-Cr catalyst at 350-500 deg.C, whole the latter 9 uses one or more catalysts among Rh, Ni, Pd with reactions made at 150-500 deg.C, preferably around 300 deg.C so that the gas emitted thereby has got rid of CO perfectly to be supplied to the fuel cell 11 upon humidity conditioning made by a hygrostat 10. Example of the catalyst for a fuel cell hydrogen electrode 13 is platinum solely or plus one or more of the Rh, Ni. Pd. This suppresses CO poisoning of the hydrogen electrode 13.