الفهرس 
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Abstract
The aim of this thesis is to develop a comprehensive computational model to simulate the physical and chemical phenomena that occur in an underground coal gasification (UCG) process. The analysis is based on the finite-element method and incorporates two-dimensional transient moving-boundary algorithms to model the permeation linked vertical well (LVW) forward gasification mode. A numerical UCG case study is performed to highlight the important prediction features of the model. Validation of the developed code is obtained by comparison of these results to those from a combustion experiment. To this end an experimental setup has been designed and a series of tests has been carried out to simulate the forward combustion process.
The model developed here provides a useful means of predicting UCG responses as evidenced from the good correlation of predicted results with those of experimental measurements performed here and laboratory scale reactor data. The model accurately calculates transient temperature profiles , rate of coal consumption , gas production rate and composition , and gas pressures and velocities , as well as the progressive configuration of the gasified zone. The model is a valuable tool for the prediction of the response of a coal seam to underground gasification.