NOVELTY - The process comprises preparing a carbonaceous feedstock from a non-gaseous carbonaceous material, introducing the carbonaceous feedstock and a hydromethanation catalyst into a hydromethanation reactor, reacting the carbonaceous feedstock in the hydromethanation reactor at a first pressure condition in the presence of carbon monoxide, hydrogen, steam and hydromethanation catalyst to produce a methane-enriched raw product gas and a solid by-product char, and withdrawing a methane-enriched raw product gas stream (50) of the methane-enriched raw product gas from the hydromethanation reactor.    USE - The process is useful for generating a sweetened gas stream from a non-gaseous carbonaceous material.    ADVANTAGE - The process is capable of economically generating the sweetened gas stream with less energy consumption in an environmentally-friendly manner.    DETAILED DESCRIPTION - The process comprises preparing a carbonaceous feedstock from a non-gaseous carbonaceous material, introducing the carbonaceous feedstock and a hydromethanation catalyst into a hydromethanation reactor, reacting the carbonaceous feedstock in the hydromethanation reactor at a first pressure condition in the presence of carbon monoxide, hydrogen, steam and hydromethanation catalyst to produce a methane-enriched raw product gas and a solid by-product char, withdrawing a methane-enriched raw product gas stream (50) of the methane-enriched raw product gas from the hydromethanation reactor, introducing the methane-enriched raw product stream into a first heat exchanger unit to recover heat energy and to generate a cooled methane-enriched raw product stream, optionally steam shifting a portion of the carbon monoxide in the cooled methane-enriched raw product stream to generate a hydrogen-enriched raw product stream, dehydrating the cooled methane-enriched raw product stream to generate a dehydrated raw product stream, compressing the dehydrated raw product stream to a second pressure condition to generate a compressed dehydrated raw product stream, and removing a portion of the carbon dioxide and a portion of the hydrogen sulfide from the compressed dehydrated raw product stream to produce a sweetened gas stream. The methane-enriched raw product gas stream comprises methane, carbon monoxide, hydrogen, carbon dioxide, hydrogen sulfide, steam and heat energy. The sweetened gas stream comprises a substantial portion of the hydrogen, carbon monoxide and methane from the compressed dehydrated raw product stream. The first pressure condition is 400-600 psig. The second pressure condition is 720-1000 psig.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic view of a process for generating a methane-enriched raw product gas stream.    Superheated steam stream (12)    Oxygen-rich gas stream (14)    Methane-enriched raw product gas stream (50)    Make-up catalyst stream (56)    Feedstock preparation unit. (100)