화학공학소재연구정보센터
Fuel, Vol.153, 585-594, 2015
A mechanistic model for the softening of coking coal and its use for predicting the dilatation of blends
Models of gas evolution and gas transport within softened coal particles, combined with bubble growth within the particles and gas flow between the particles, are used to develop a phenomenological model of the process of contraction and dilatation of coal samples in a dilatometer test. The model is fitted to dilatometer curves for a range of different coals, in order to determine unknown parameters of the model. The model is shown to provide excellent fits to the measured data for these coals, validating the assumptions underlying it. Finally, the model is used to predict the dilatation of blends. The comparison of the predictions with measured dilatation of blends is good for some cases, but there are discrepancies when non-expanding coals comprise a significant proportion of the blend. A hypothesis for the effect of the non-expanding coals upon the dilatation is proposed. Crown Copyright (C) 2015 Published by Elsevier Ltd. All rights reserved.