ANALYSIS OF COAL HEAT CONDUCTION ON UNDERGROUND COAL GASIFICATION MODELING IN THE LABORATORY SCALE

• Main Author: Oktovia, Silvia
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/43890
• Institution: Institut Teknologi Bandung

Coal is a commodity that can support national development. In Indonesia, coal can be used for coal-fired power plants, cement plants, the petrochemical industry, the steel industry, and others. Indonesia has relatively large coal resources and reserves, but there are still coal reserves that cannot be utilized optimally because they are hampered by technological and economic factors. Therefore, Indonesia needs to develop technology to extract coal in an environmentally friendly manner, one of which is Underground Coal Gasification (UCG). The research was conducted at a laboratory scale at the Geomekanika Laboratory and Mining Equipment. In the UCG research process, the important thing to note is heat because the UCG process involves the heating of coal, so an analysis of the heat conduction that occurs in coal is needed. This is to find out how much heat flow conduction to the rocks around UCG which can potentially disturb its stability. This research is intended to get the value of thermal conductivity in coal and to compare the results with the existing literature. From the results of the experiment, a coal temperature graph for the time of the experiment is obtained. From the data obtained, three points of time are taken for observation which are then processed by the Euler method of the finite difference method equation using the Matlab R2016A software so that the thermal conductivity (k) is obtained. From this experiment, the k value (thermal conductivity) of coal obtained is 0,57W/mºC at point A, 0,68W/mºC at point B, and 0,9W/mºC at point C. There is a difference between the value of k from the test results and the value of k in the literature with an average error of 0,81%. It can be stated that the value of k is directly proportional to temperature. The higher the temperature, the higher the value of thermal conductivity will be.