NOVELTY - Combustor (112) comprises housing (120) defining combustion chamber (122) and having exhaust port for discharging hot combustion gases; and fuel vaporizer (124) having fuel tube (126) with inlet (28) for introducing liquid fuel, outlet (30) for dispensing vaporized fuel to combustion chamber, and electric heating element (32) disposed between inlet and outlet, such that portion of fuel tube extends into combustion chamber and exposed to hot combustion gases exiting combustion chamber.    USE - Combustor used for generating and supplying hot combustion gases to fuel reformer.    ADVANTAGE - The combustor reduces electricity requirements to vaporize liquid fuel for duration of start-up of fuel reformer and fuel cell, i.e. no electric current is required to be supplied to electric heating element when temperature within combustion chamber has attained at least predetermined temperature and hot combustion gases passing over portion of fuel tube extending into combustion chamber are sufficient to vaporize liquid fuel within fuel tube.    DETAILED DESCRIPTION - Combustor (112) comprises housing (120) defining combustion chamber (122) and having exhaust port for discharging hot combustion gases; and fuel vaporizer (124) having fuel tube (126) with inlet (28) for introducing liquid fuel, outlet (30) for dispensing vaporized fuel to combustion chamber, and electric heating element (32) disposed between inlet and outlet, such that portion of fuel tube extends into combustion chamber and exposed to hot combustion gases exiting combustion chamber. Electric current can be supplied to electric heating element to vaporize liquid fuel within fuel tube when temperature within combustion chamber is below predetermined temperature, such that no electric current is needed to be supplied to electric heating element when temperature within combustion chamber is at least predetermined temperature and hot combustion gases passing over portion of fuel tube are sufficient to supply enough heat to vaporize liquid fuel within fuel tube. The combustion chamber includes first air inlet for mixing air with vaporized fuel, waste gas inlet for mixing waste gas from fuel cell with vaporized fuel, and second air inlet for mixing air with hot combustion gases within combustion chamber. The fuel vaporizer includes third air inlet for supplying air within fuel tube. An INDEPENDENT CLAIM is included for fuel cell system comprising fuel reformer (14) for generating reformate from hydrocarbon fuel, fuel cell (16) for generating electric current, and combustor for generating and supplying hot combustion gases to fuel reformer.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic cross-sectional view of fuel cell, fuel reformer, and combustor with fuel vaporizer.    Fuel reformer (14)    Fuel cell (16)    Inlet (28)    Outlet (30)    Electric heating element (32)    Combustor (112)    Housing (120)    Combustion chamber (122)    Fuel vaporizer (124)    Fuel tube (126)