55.石炭の超臨界水処理における各種硫黄の変化

抄録

Supercritical Fluids have high diffusibility and solubility. In coal processing, the major interest has been in the development of supercritical extraction to produce liquid fuels from coal. On the other hand, some works have reported concerning the removal of sulfur and ash in coal from a environmental point of view. We have reported the removal of inorganic sulfur with supercritical water, however the mechanism of desulfurization in supercritical water is not so clear. This work attempts to investigate reactions of sulfur compounds in coal with supercritical water. Organic compounds with sulfur functional groups react in supercritical water, and pyrite is changed into iron oxide, however hetero cyclic compound hardly react.