NOVELTY - Generating methane-enriched raw product gas stream from non-gaseous carbonaceous material (10) comprises: (a) supplying to hydromethanation reactor (200) carbonaceous feedstock (32) derived from non gaseous carbonaceous material, hydromethanation catalyst, superheated steam stream (12) and oxygen-rich gas stream (14) having steam; (b) reacting portion of feedstock in reactor in presence of catalyst, carbon monoxide, hydrogen and steam; (c) reacting portion of feedstock with oxygen to produce carbon monoxide, hydrogen and heat energy; and (d) withdrawing methane-enriched raw gas from reactor.    USE - The process is useful for generating a methane-enriched raw product gas stream from a non-gaseous carbonaceous material (claimed), where the gaseous product includes methane or hydrogen.    ADVANTAGE - The process avoids the utilization of fuel-fired superheater to superheat the steam fed to the hydromethanation reactor during steady-state operation of the process, thus improving the efficiency of the process.    DETAILED DESCRIPTION - Generating a methane-enriched raw product gas stream from a non-gaseous carbonaceous material (10) comprises: (a) supplying to a hydromethanation reactor (200) a carbonaceous feedstock (32) derived from the non gaseous carbonaceous material, a hydromethanation catalyst, a superheated steam stream (12) and an oxygen-rich gas stream (14) comprising steam, where the hydromethanation reactor comprises a fluidized bed having a upper portion above a lower portion, and the superheated steam stream and the oxygen-rich gas stream are introduced into the lower portion of the fluidized bed; (b) reacting a portion of the carbonaceous feedstock in the hydromethanation reactor in the presence of hydromethanation catalyst, carbon monoxide, hydrogen and steam at a target operating temperature to produce a methane-enriched raw gas and a solid by-product char, where the methane-enriched raw gas comprises methane, carbon monoxide, hydrogen, carbon dioxide, hydrogen sulfide, steam, heat energy and entrained fines; (c) reacting a portion of the carbonaceous feedstock with oxygen to produce carbon monoxide, hydrogen and heat energy; and (d) withdrawing the methane-enriched raw gas from the hydromethanation reactor as the methane-enriched raw product gas stream, where (i) the reaction of step (b) predominates in the upper portion of the fluidized bed, (ii) the reaction of step (c) predominates in the lower portion of the fluidized bed, (iii) the reaction of step (b) has a syngas demand, a heat demand and a steam demand, (iv) the syngas demand and the heat demand are substantially satisfied by the reaction of step (c), (v) the steam demand is substantially satisfied by steam in the superheated steam stream and the oxygen-rich gas stream, and steam generated from the carbonaceous feedstock, and (vi) the superheated steam stream, the oxygen-rich gas stream, the carbonaceous feedstock and the hydromethanation catalyst are introduced into the hydromethanation reactor at a temperature below the target operating temperature of the reaction of step (b).    DESCRIPTION OF DRAWING(S) - The figure shows the process for generating methane-enriched raw product gas stream.    Non-gaseous carbonaceous material (10)    Superheated steam stream (12)    Oxygen-rich gas stream (14)    Carbonaceous feedstock (32)    Hydromethanation reactor (200)