NOVELTY - Generating gaseous product involves reacting carbonaceous feedstock in the hydromethanation reactor in presence of carbon monoxide, hydrogen, steam and hydromethanation catalyst to produce methane-enriched raw product stream of methane, carbon monoxide, hydrogen, carbon dioxide and heat energy; withdrawing methane-enriched product stream; introducing the methane-enriched raw product stream to generate cooled methane-enriched raw product stream; removing carbon dioxide and hydrogen sulfide product stream to produce sweetened gas stream; and followed by recovering methane product stream.    USE - For generating several gaseous products from a carbonaceous feedstock, and generating a methane product stream (claimed).    ADVANTAGE - The process eliminates the need of carbon fuel-fired superheater; improves gas recycle loops; generates steam efficiently; and decreases the complexity and cost of producing methane.    DETAILED DESCRIPTION - Generating several gaseous products from a carbonaceous feedstock, and generating a methane product stream, involves:    (A) supplying to a hydromethanation reactor a carbonaceous feedstock, a hydromethanation catalyst, a steam stream, a first gas feed stream and, optionally, a first oxygen-rich gas stream;    (B) reacting the carbonaceous feedstock in the hydromethanation reactor in the presence of carbon monoxide, hydrogen, steam and hydromethanation catalyst, to produce a methane-enriched raw product stream comprising methane, carbon monoxide, hydrogen, carbon dioxide and heat energy;    (C) withdrawing the methane-enriched product stream from the hydromethanation reactor;    (D) introducing the methane-enriched raw product stream into a heat exchanger to recover heat energy and generate a cooled methane-enriched raw product stream;    (E) using the heat energy recovered in step (D) to (a1) superheat the steam stream prior to introduction into the hydromethanation reactor, and (a2) generate a first process steam stream;    (F) in the event that the molar ratio of hydrogen to carbon monoxide in the cooled methane-enriched raw product stream is less than 3:1, optionally sour shifting a portion of the carbon monoxide in the cooled methane-enriched raw product stream to generate heat energy and a hydrogen-enriched treated product stream having a molar ratio of hydrogen to carbon monoxide of at least 3:1;    (G) optionally recovering heat energy from step (f), if present, where at least a portion of the recovered heat energy is utilized to generate a second process steam stream;    (H) optionally reacting a portion of the hydrogen and at least a portion of the carbon monoxide in the cooled methane-enriched raw product stream (or the hydrogen-enriched treated product stream if present) in a catalytic methanator in the presence of a sulfur-tolerant methanation catalyst to produce a methane-enriched treated product stream;    (I) optionally recovering heat energy from step (H), if present, where a least a portion of the recovered heat energy is utilized to generate a third process steam stream;    (J) removing a substantial portion of the carbon dioxide and a substantial portion of the hydrogen sulfide from the cooled methane-enriched raw product stream (or the hydrogen-enriched treated product stream, if present, or the methane-enriched treated product stream, if present) to produce a sweetened gas stream comprising a substantial portion of the hydrogen, carbon monoxide and methane from the cooled methane-enriched raw product stream (or the hydrogen-enriched treated product stream, if present, or the methane-enriched treated product stream, if present);    (K) splitting the sweetened gas stream into a recycle gas stream and a sweetened product gas stream;    (L) supplying the recycle gas stream and a second oxygen-rich gas stream to a partial oxidation reactor;    (M) reacting the recycle gas stream with oxygen in the partial oxidation reactor to generate heat energy and the first gas feed stream, where the first gas steam comprises carbon monoxide, hydrogen and steam;    (N) optionally separating a portion of the hydrogen from the sweetened product gas stream to produce a hydrogen-depleted sweetened product gas stream comprising methane, hydrogen and carbon monoxide;    (O) reacting carbon monoxide and hydrogen present in the sweetened product gas stream (or hydrogen-depleted sweetened product gas stream, if present) in a catalytic methanator in the presence of a methanation catalyst to produce heat energy and a methane-enriched sweetened product gas stream;    (P) recovering heat energy from step (O), where at least a portion of the recovered heat energy is utilized to generate a fourth process steam stream; and    (Q) recovering at least a portion of the methane-enriched sweetened product gas stream as the methane product stream, where the reaction in step (B) has a steam demand, a syngas demand and a heat demand, the carbonaceous feedstock comprises a moisture content, the first oxygen-rich gas stream, if present, optionally comprises steam, the steam demand is satisfied by the steam stream, steam contained in the feed gas stream, the moisture content of the carbonaceous feedstock and, if present, steam in the first oxygen-rich gas stream, the steam stream is substantially made up from at least a portion of at least one of the first process steam stream, the fourth process steam stream, the second process steam stream (when present), and the third process steam stream (when present), the amount of carbon monoxide and hydrogen in the first gas feed stream is sufficient to meet the syngas demand of the reaction in step (B), and the steam stream and the feed gas stream comprise heat energy that, in combination, is sufficient to substantially meet the heat demand of the reaction in step (B).