NOVELTY - Oxygen-enriched gas (14) and water vapor (18) are pre-mixed and contacted with carbonaceous fuel (34) at stoichiometric ratio in burner. An ultra-superheated steam composition (40) containing superheated water vapor, carbon dioxide and free radicals is produced. Composition is directed to gasifier (44), and reacted with gasifier feedstock material to form syngas (52).    USE - Gasifying carbonaceous material used for producing nitrogen-free syngas, used in fluidized bed reactor.    ADVANTAGE - The gasification of carbonaceous material is carried out efficiently with low oxygen consumption, low steam consumption and high cost efficiency. The produced syngas has enhanced hydrogen and carbon monoxide concentration.    DETAILED DESCRIPTION - A source of oxygen-enriched gas and a source of water vapor are pre-mixed to form a substantially homogeneous mixture containing artificial air (30). The oxygen-enriched gas contains less than 40 mol% of nitrogen. The homogeneous mixture is contacted with ash-free carbonaceous fuel at a substantially stoichiometric ratio in a high turbulence burner. The burner has an aerodynamic or a bluff material flame holder for promoting the formation of free radical species of combustion products at adiabatic flame temperature exceeding 2400 degrees F. An ultra-superheated steam (USS) composition is produced which contains a mixture of super heated water vapor, carbon dioxide and free radicals having less than 5 mol% of oxygen. The composition is recovered and directed to a gasification reactor, and carbonaceous gasifier feedstock material is reacted with the composition to form syngas.    INDEPENDENT CLAIMS are also included for the following:    (1) production of an ultra-superheated steam composition;    (2) gasification apparatus for gasifying carbonaceous material;    (3) burner for producing ultra-superheated steam composition; and    (4) method for making burner for producing ultra-superheated steam composition.    DESCRIPTION OF DRAWING(S) - The figure shows a block diagram of the gasification process.    continuous gasification method (10)    oxygen enriched gas (14)    water vapor (18)    artificial air (30)    ash-free carbonaceous fuel (34)    ultra-superheated steam composition (40)    gasifier (44)    syngas (52)