NOVELTY - A fuel processing system comprises a source of air, a source of hydrocarbon fuel, a source of downwardly impelled water droplets, a separator for separating pure oxygen out of the air, a hydrogen-rich gas generator receiving a mixture of oxygen derived from source of air and liquid hydrocarbon fuel from fuel source into its upper end, water/gas shift reactor(s), preferential carbon monoxide oxidizer(s), and at least two compressors.    USE - For generating pure nitrogen-free hydrogen and segregated nitrogen and carbon dioxide.    ADVANTAGE - The inventive fuel process system is compact and provides pure nitrogen for any segregated use. It requires no steam in the hydrocarbon feed stock, rendering the fuel processing system not only inexpensive, but also very easy to operate.    DETAILED DESCRIPTION - A fuel processing system comprises a source of air, a source of hydrocarbon fuel, a first vertical chamber having a gas flow outlet at the top, a source of downwardly impelled water droplets, a separator for separating pure oxygen out of the air from the source of air, a hydrogen-rich gas generator, water/gas shift reactor(s), a second vertical chamber having a gas flow inlet at the top and a gas flow exit at the bottom, a static mixer connecting the inlet with the outlet, preferential carbon monoxide oxidizer(s) (PrOx), and at least two compressors connected in serial gas flow relationship with the output gas flowing through the gas flow exit. The hydrogen-rich gas generator is disposed beneath the source of water droplets and receives a mixture of oxygen derived from the source of air and liquid hydrocarbon fuel from the source of fuel into its upper end. The oxygen is derived from the separator which provides pure oxygen to the generator. The generator has a shield to prevent water droplets from impinging on the generator. It provides, at its lower end, a gaseous mixture containing hydrogen, carbon dioxide and carbon monoxide flowing upwardly through the downwardly impelled droplets toward the outlet. The water/gas shift reactor is disposed above the source of water droplets. The water droplets vaporize within the flow of gaseous mixture before entering the water/gas shift reactor. The preferential carbon monoxide oxidizer comprises a bed of PrOx catalyst downstream of the generator below the inlet, receives oxygen derived from the source of air and oxygen derived from the separator providing pure oxygen to the PrOx, and provides a nitrogen-free output gas containing less than 100 ppm carbon monoxide flowing through the gas flow exit. The pressure of gas exiting one of the compressors is sufficiently high to condense water from the gas, and the pressure of gas exiting another of the compressors is sufficiently high to condense carbon dioxide from the gas, providing pure, nitrogen-free hydrogen.    DESCRIPTION OF DRAWING(S) - The figure is a simplified, schematic diagram of a reformate generator.