58.石炭炭化反応中の粘度変化

抄録

A needle penetration technique combined with a dilatometry was applied to six kinds of coals to evaluate their apparent viscosity during heating. The viscosity of the coals depended on heating rate, nitrogen gas pressure as well as their pyrolysis characteristics. The viscosity change shifted to a higher temperature range for higher heating rates. The minimum viscosity decreased and approached to constant value asymptotically as the heating rate increased. The temperature range for viscosity change roughly coincided with that for the change of yield of pyridine extract. It was suggested that the viscosity depended on the temperature, mass fraction of plastic intermediate and interaction between plastic intermediate and the other components.