SOLID OXIDE FUEL CELL

摘要

Provided is a fuel cell whereby an unmodified fuel gas is not supplied to a fuel electrode at the time of start-up without requiring a storage chamber for a hydrogen gas and the like. The fuel cell includes a fuel cell stack (10) where separators (2) and power generation cells (16) each of which has a solid electrolyte layer (11) on the upper and lower surfaces of which a fuel electrode layer (12) and an oxidant electrode layer (13) are respectively disposed are piled up alternately, a fuel gas supply line (40) into which a modifying device (45) is inserted to supply a modified gas to the stack (10), a steam supply line (60) into which a steam generator (41) is inserted to supply steam to the upstream side of the modifying device on the fuel gas supply line. Start-up modifying devices (46a) and (46b) are inserted into the downstream side of a connection section where the fuel gas supply line is connected to the steam supply line on the fuel gas supply line. Start-up steam generators (43a) and (43b) are inserted in the steam supply line. The start-up modifying devices and the start-up steam generators are so positioned as to face start-up heating means (6a) to (6d) which operate at the time of start-up.