82.加熱に伴う石炭の凝集構造変化

抄録

Since the associated molecular structure has an important role in the characteristics and reactivity of coal, natures of the structure have not been fully understood. In this study, change in the associated molecular structure of coal induced by heat treatment is investigated with in-situ ^1H-NMR. A solid-echo pulse sequence was employed to monitor the variation of molecular mobility of coals. The echo signals obtained were deconvoluted into a set of a Gaussian and two Lorentzian decay, which represent the immobile intermediate and mobile components, respectively. Close correspondence between the changes in the fractional intensity of mobile component (Hm) and those in volumetric swelling ratio suggest that the solvent induced swelling proceed with relaxation of the associated molecular structure of coal. Thermally induced change in molecular mobility of coal is successfully observed with in-situ.