Enthalpies of sorption for methanol on Taiheiyo coal were investigated by repeated uptake and desorption experiments using fresh and heat treated coal to 125℃. The adsortption isotherm obtained for the heated coal differs from that of the original coal but is similar to that of the oxidized coal which was previously reported. Results of thermal analysis indicate an increase in strong interactions between methnal and a certain sites in the coal which appear to be created during thermal treatment or oxidation processed.
