NOVELTY - A desulfurization system (10) comprises a liquid phase desulfurizer (14) for removing a first portion of sulfur from hydrocarbon fuel in a liquid state to produce a partially-desulfurized liquid hydrocarbon fuel; and a gas phase desulfurizer (22) for removing a second portion of the sulfur from partially-desulfurized hydrocarbon fuel in a gaseous state. The system further comprises a fuel vaporizer in flow sequence between liquid and gas phase desulfurizer.    USE - In a solid oxide fuel cell system for removing sulfur from sulfur-containing hydrocarbon fuel (claimed), and for removing sulfur from hydrocarbon fuels in a small scale continuous process for supplying fuel to a fuel cell.    ADVANTAGE - The liquid and gas phase desulfurizer cooperating in sequence can reduce the sulfur content in fuel being passed continuously into the reformer to less than 1 parts per million per volume (ppmv), and in reformate being passed into the stack, to less than 0.1 ppmv. By combining liquid phase and gas phase sorbent technologies together, the initial fuel can be desulfurized by the liquid-phase desulfurizer for startup. The combining use of liquid phase and gas phase sorbents result in an optimum continuous desulfurization system.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a solid oxide fuel cell system comprising a catalytic hydrocarbon reformer for partially oxidizing hydrocarbon fuel to provide hydrogen rich reformate and a fuel cell stack for oxidizing said reformate to produce electricity, where the fuel cell system includes the desulfurizer system for removing sulfur from sulfur-containing hydrocarbon fuel.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of the solid oxide fuel cell (SOFC) system for continuous fuel desulfurization.    desulfurizing systems (10)    flow of sulfur-containing hydrocarbon fuel (12)    liquid-phase desulfurizer (14)    fuel delivery unit (18)    gas-phase desulfurizer (22)    reformer (24)    SOFC system. (100)