NOVELTY - Making a synthesis gas stream comprising hydrogen and carbon monoxide involves reacting a carbonaceous feedstock in gasification reactor to form a raw product gas stream; removing steam and sweetening the raw product gas stream to form a sweetened gas stream; separating and adding steam to first portion of the sweetened gas stream to form first and second reformer input gas stream; reforming second reformer input stream to form a recycle gas stream; introducing the recycle gas stream to gasification reactor; and reforming the first reformer input stream to form synthesis gas stream.    USE - For synthesis of gas stream useful for preparation of synthesis gas (syngas)-derived product, heat energy and combustible tail gas mixture which generate heat stream for generation of electrical energy by using turbine (claimed) and used as supplementary fuel to fire reforming furnaces. The syngas-derived product is e.g. methanol, ethanol, dimethyl ether, diethyl ether, methyl t-butyl ether, acetic acid, acetic anhydride, Fischer-Tropsch diesel fuel.    ADVANTAGE - The process provides synthesis gas without the use of equipment-intensive and energy-inefficient cryogenic separation of carbon monoxide, hydrogen or both from methane. The gasification reaction is catalyzed, the process use relatively lower temperatures in the gasification reactor, thus increasing the overall energy efficiency of the process. The recycle gas stream emerge from the reforming step at high temperature, thus separate recycle preheat furnace is not required.    DETAILED DESCRIPTION - Making a synthesis gas stream comprising hydrogen and carbon monoxide involves providing a carbonaceous feedstock; reacting the carbonaceous feedstock in a gasification reactor in the presence of steam and a gasification catalyst under suitable temperature and pressure to form a raw product gas stream comprising several gases containing methane, hydrogen and carbon monoxide; removing steam and sweetening the raw product gas stream to form a sweetened gas stream; separating and adding steam to at least a first portion of the sweetened gas stream to form a first reformer input gas stream having a first steam/methane ratio, and a second reformer input stream having a second steam/methane ratio, in which the first steam/methane ratio is smaller than the second steam/methane ratio; reforming the second reformer input stream to form a recycle gas stream comprising steam, carbon monoxide and hydrogen; introducing the recycle gas stream to the gasification reactor; and reforming the first reformer input stream to form the synthesis gas stream.