To efficiently and easily gasify various coals, to inhibit environmental pollution by easily converting sulfuric components contained in coals into harmless inorganic salts and removing them, to allow relatively little limitation on heat resistant properties and to allow miniaturization and increase the electric power generation efficiency of electric power generating devices.
A slurry of a finely powdered coal and water is maintained at a temperature and pressure of the subcritical or supercritical state of water to decompose the coal in a decomposition reactor 14. The obtained decomposed product is maintained at a temperature and pressure equal to or below the subcritical state of water in a separator 16 to be separated into an oil component, a combustible gas, a residue and water. The oil component is supplied to a gasification reactor 20 to be gasified into a combustible gas. The residue and water which were separated by the separator 16 are added with an oxygen source in a partial oxidation device 17, and maintained at a temperature and pressure of the subcritical or supercritical state of water to generate active hydrogen, which is supplied to the decomposition reactor 14.
HANZAWA MASATOSHI
TANAKA AKIRA
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