Study on the Influence of Phase Change Process on the Desorption Characteristics of Gas-Containing Anthracite in Phase Change Heat Storage Materials

Abstract

The slow desorption rate of coal body gas is easy to cause coal and gas outburst accidents, the temperature has an important influence on the desorption process of gas, and increasing the temperature can significantly improve the gas desorption rate. Based on this law, inorganic phase-change energy storage materials with a phase change temperature of 58°C were selected to study the influence range of the phase change process of materials with different contents on the temperature of coal body by comparative experiments. At the same time, the effect of the change of temperature on the desorption amount and desorption rate of gas desorption within coal was obtained by applying the phase change material to the adsorption/desorption experimental system. It was found that after the addition of the phase change material, the gas-containing coal which had completed the desorption process restarted to desorb the gas, and the final stabilized desorption amount was 1.709 cm³/g with an increase of 0.185 cm³/g, accounting for 12.14% of the desorption amount under normal conditions, which indicates that the addition of phase change materials can improve the desorption rate of coal samples.