부산대학교 도서관

A one-dimensional model has been developed to account for the physico-chemical processes occurring inside a burning wet coal surface. The model and associated assumptions have been verified with experimental data from the combustion and drying of coal. The results also show that the model prediction of the heat transferred from the coal surface into the coal is much higher than that calculated by the simple heat conduction equation. The fraction of the water in the coal that reacts with char is shown as a function of the linear burn velocity and the surface temperature. In addition, the effect of variations in coal moisture and the thermal conductivity on the thickness of the dry zone are also shown. This work is related to the understanding of the processes involved in underground coal gasification.