NOVELTY - The thermal decomposition of carbonaceous resources (1) is performed to generate pyrolysis gas and thermal decomposition tar, while performing partial oxidation of the resources with oxygen (4) and water vapor (5) to generate gasification gas (6). The pyrolysis gas, thermal decomposition tar and gasification gas are reformed to generate reformed gas (13).    USE - For gasifying carbonaceous resources such as general-waste refuse, agricultural-type biomass e.g. straw, sugar cane, rice bran and plants, forestry-type biomass e.g. paper manufacture waste material, lumber waste material, fuel-wood and thinning lumber, livestock farming-type biomass e.g. livestock waste material, fishery-type biomass e.g. fish processing dregs, waste material-type biomass e.g. organic refuse, waste-derived fuel, refused-derived fuel (RDF), garden tree, construction wastes and sewage sludge, rigid plastics, flexible plastics and shredder dust, to generate petroleum, natural gas and coal for electric power generation system.    ADVANTAGE - Improves conversion efficiency of the carbonaceous resources into gas, according to the characteristics of carbonaceous resources, while achieving size-reduction, by integrally providing the gasifier, thermal decomposition furnace and reformer.    DETAILED DESCRIPTION - The thermal decomposition, partial oxidation and reformation are performed at temperature ranging between 300-800 degrees C, 1200-1600 degrees C and 900-1200 degrees C, respectively. The metal (11) is removed from the pyrolysis residue (9) and carbonaceous residue (12) is then separated. The reformation is performed at pressure ranging between 0.5-3.0 Mpa. The carbonaceous resources selected for thermal decomposition is shredder dust, flexible plastics, raw tree or general-waste refuse, and carbonaceous resources for partial oxidation is timber and rigid plastics.    An INDEPENDENT CLAIM is also included for carbonaceous resource gasifier.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of the carbonaceous resource gasifier.    carbonaceous resources (1)    gasifier (2)    thermal decomposition furnace (3)    oxygen (4)    water vapor (5)    gasification gas (6)    slag (7)    pyrolysis residue (9)    reformer (10)    metal (11)    carbonaceous residue (12)    reformed gas (13)    gas-purification installation (14)    purified gas (15)