NOVELTY - Converting a carbonaceous feedstock into gaseous products, comprises: supplying a biomass feedstock to a reactor (100); at least partially combusting the biomass feedstock in the reactor in the presence of oxygen; utilizing the heat energy to generate steam; introducing a particulate carbonaceous feedstock, an alkali metal gasification catalyst, and at least a portion of the steam to a gasifier (200); reacting the carbonaceous feedstock in the gasifier in the presence of the steam and the catalyst to form a gas stream; and separating the gaseous products to produce a product stream.    USE - The process is useful for converting a carbonaceous feedstock into gaseous product, which is methane (all claimed).    ADVANTAGE - The process provides synthetic natural gas which more efficiently utilizes fuel sources, including those utilized for generating steam, while decreasing the carbon footprint of the overall process.    DETAILED DESCRIPTION - Process for converting a carbonaceous feedstock into many gaseous products, comprises: supplying a biomass feedstock to a reactor (100); at least partially combusting the biomass feedstock in the reactor in the presence of an oxygen-containing gas and under suitable temperature and pressure to generate heat energy; utilizing the heat energy to generate steam; introducing a particulate carbonaceous feedstock, an alkali metal gasification catalyst, and at least a portion of the steam to a gasifier (200); reacting the carbonaceous feedstock in the gasifier in the presence of the steam and the alkali metal gasification catalyst and under suitable temperature and pressure to form a gas stream comprising gaseous products comprising methane and at least one or more of hydrogen, carbon monoxide, carbon dioxide, hydrogen sulfide, ammonia and other higher hydrocarbons; and at least partially separating the gaseous products to produce a product stream comprising a predominant amount of one of the gaseous products.    DESCRIPTION OF DRAWING(S) - The figure shows a flow chart illustrating a process for generating combustible gases.    Reactor (100)    Char (102)    Heated conduits (105, 110, 120)    Gasifier (200)    Recycle process. (300)