NOVELTY - A hydrocarbon-containing feed and steam (215) are supplied through zone (I) of reactor having packing material and catalyst. Portion(s) of obtained product is passed through zone (II) of reactor. Product comprising syngas is removed from zone (II). Oxygen-containing gas is fed into zone (II). Gas and fuel (219) are combusted, and combustion product is removed from zone (I). The reformed product containing syngas is supplied to anode of solid oxide fuel cell to produce electricity. Portion(s) of effluent from cathode is supplied to initial reforming process.    USE - For producing electrical energy from proton-conducting solid oxide fuel cell used as power supply for vehicles.    ADVANTAGE - The electrical energy is efficiently produced from fuel cell.    DETAILED DESCRIPTION - A hydrocarbon-containing feed and steam (215) are supplied through a zone (I) of a reactor containing bed packing material and a reforming catalyst at a space velocity of at least 500 hr-1 under reforming condition. The portion(s) of obtained product is passed through a zone (II) of the reactor containing bed packing material, and heat is transferred from the product to packing material. The product comprising a syngas enriched in hydrogen is removed from zone (II). An oxygen-containing gas is introduced into zone (II). The gas and a fuel (219) are combusted in a region proximate to an interface between zones (I,II) to produce heat and a combustion product. The heat produced due to combustion is transferred to packing material of zone (I). The total combustion product is removed from zone (I). The reformed product containing syngas is supplied to anode region of proton-conducting solid oxide fuel cell to produce electricity. Portion(s) of effluent from fuel cell cathode is supplied to initial reforming process.    DESCRIPTION OF DRAWING(S) - The figure shows the schematic view of illustrating the temperature swing reforming process.    Steam feed (215)    Reforming product (217)    Fuel (219)    Beds (220,230)    Valves (251-254,256-259)