In this study, a packed bed reactor was developed to investigate the gasification process of coal particles. The effects of coal particle size and heater temperature of reactor were examined to identify the thermochemical processes through the packed bed. Three different coal samples with varying size, named as A, B, and C, are used, and the experimental results show that the packed bed with smaller coal size has higher temperature, reaching 624 °C, 582 °C, and 569 °C for coal A, B, and C, respectively. In the case of CO formation, the smaller particle size has greater products in the unit of mole fraction over the area of generation. However, the variation in the porosity of the packed bed due to different coal particle sizes affects the reactions through the oxygen access. Consequently, the CO formation is least from the coal packed bed formed by the smallest particle size A. A second test with the temperature variations shows that the higher heater temperature promotes the chemical reactions, resulting in the increased gas products. The findings indicate the important role of coal seam porosity in underground coal gasification application, as well as temperature to promote the syngas productions.

在这项研究中，开发了填充床反应器以研究煤颗粒的气化过程。检查了煤的粒度和反应器的加热器温度的影响，以确定通过填充床的热化学过程。使用了三个不同大小的煤样品，分别称为A，B和C，实验结果表明，较小煤块的填充床温度较高，分别达到624°C，582°C和569°C分别用于煤A，B和C。在形成CO的情况下，较小的粒度在生成区域内以摩尔分数为单位具有较大的产物。然而，由于煤粒径不同，填充床孔隙率的变化会影响通过氧气进入的反应。所以，CO的形成最少来自具有最小粒径A的煤填充床。第二项温度变化测试表明，较高的加热器温度会促进化学反应，从而导致气体产物增加。这些发现表明煤层孔隙度在地下煤气化应用中的重要作用，以及温度可以促进合成气的生产。