DESULFURIZATION METHOD OF FUEL

PROBLEM TO BE SOLVED: To improve the total efficiency of a fuel cell system. SOLUTION: The desulfurization method of fuel is provided with a process in which, under hydrogen atmosphere, a fuel supply stream is made to contact a hydrogenation catalyst to hydrogenate and a sulfur-contained compound is converted into hydrogen sulfide, a process in which hydrogen sulfide is removed and a desulfurized fuel stream is generated, a process in which a preliminary reforming is made to produce a fuel cell feed stream containing steam and methane of an amount corresponding to load demand of the fuel cell, a process to divide the fuel cell feed stream into a first portion and a second portion, a process to transport the first portion to an anode, a process in which the second portion is treated using a reformer and hydrogen content is increased, and a hydrogen condensed fuel stream is generated, a process in which the hydrogen condensed fuel stream is cooled to remove excess water and a hydrogen increased fuel stream is generated, and a process in which the hydrogen increased fuel stream is used as a hydrogen source for hydrogenating the fuel supply stream. COPYRIGHT: (C)2010,JPO&INPIT