NOVELTY - Producing a synthesis gas mixture, comprises: (a) providing a hydrocarbon material; (b) subjecting the hydrocarbon material to catalytic partial oxidation (CPO) to produce initial synthesis gas comprising carbon monoxide, hydrogen and carbon dioxide; and (c) adding liquid water to the initial synthesis gas obtained in step (b) to obtain a synthesis gas mixture comprising water as the primary component.    USE - The synthesis gas mixture is useful for the production of a gas mixture comprising hydrogen and carbon dioxide, where the gas mixture is useful for the production of hydrogen and urea. The liquid water is useful for the purpose of setting the steam/gas (S/G) ratio in a synthesis gas mixture to be subjected to a water gas shift reaction for the production of hydrogen (all claimed).    ADVANTAGE - The process is capable of efficiently providing syngas while reducing or avoiding conditions that could promote the phenomenon of metal dusting in an economical manner.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for:    (1) a process for the production of a gas mixture comprising hydrogen and carbon dioxide, comprising the steps (a)-(c) as above per se, and (d) subjecting the synthesis gas mixture to a water gas shift reaction to react carbon monoxide with water under the formation of a gas mixture comprising hydrogen and carbon dioxide;    (2) a process for the production of hydrogen comprising the steps (a)-(d) as above per se, and separating hydrogen from the gas mixture;    (3) a process for the production of urea, comprising steps (a)-(d) as above per se, removing carbon dioxide from the gas mixture comprising hydrogen and carbon dioxide, to obtain a gas mixture enriched in hydrogen, reacting the hydrogen-enriched gas mixture with nitrogen under ammonia-forming conditions to produce ammonia, and reacting the ammonia with the removed carbon dioxide under urea-forming conditions; and    (4) a plant for the production of hydrogen, comprising a catalytic partial oxidation reactor and a water gas shift reactor downstream of the catalytic partial oxidation reactor, where an injector for water is placed between a gas outlet of the catalytic partial oxidation reactor and a gas inlet of the water gas shift reactor.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of a process for producing a synthesis gas mixture.    Catalytic partial oxidation section (100)    Quenching section (101)    First high temperature stage section (102)    Process steam generation section (103)    Feed preheater. (104)