7.脱水に伴う褐炭の含有水組成と水による膨潤特性の変化

抄録

Water in brown coal, in general, consists of three different types of water, i.e. free, bound and non-freezable water. When died at 303K, the water was released in the above order. In swelling experiments with water, the changes in the coal volume were reversible in the region for free water desorption, while irreversible in that for the other types desorption. A portion of hydrogen in the coal matrix was observed to demonstrate Lorentzian decays. The amount of the mobile coal hydrogen (M_H) decreased with the removal of bound or non-freezable water. M_H was in good agreement with the amount of hydroxylic hydrogen that was quantitatively exchanged by deuterium.