Underground coal gasification (UCG) is a promising option for utilising deep-seated coal for the in-situ production of syngas. In this study, we modelled and screened the chemical reactions using the previous laboratory UCG experiments to investigate the complicated chemical reaction processes to apply them to field scale UCG operations. First, we constructed 1D and 3D numerical models by matching simulation with the laboratory coal combustion and gasification experiments involving a combustion tube test and then physically scaled the 3D experiments reported by Thorsness et al. and Stańczyk et al., respectively. We considered 5 chemical reactions from 12 chemical reactions by matching simulation to the experimental results. We adjusted the chemical reaction parameters used in our numerical simulations to match those of the experimental data. The numerical simulation results show that the proposed model can be applied in the laboratory as well as in the field-scale UCG operations to predict gasification behaviours, especially the temperature distribution, gas production rate, and gas composition.

煤炭地下气化（UCG）是利用深层煤炭就地生产合成气的一种很有前景的选择。在这项研究中，我们使用以前的实验室 UCG 实验对化学反应进行建模和筛选，以研究复杂的化学反应过程，并将其应用于现场规模的 UCG 操作。首先，我们通过将模拟与涉及燃烧管测试的实验室燃煤和气化实验相匹配来构建 1D 和 3D 数值模型，然后对 Thorsness 等人报告的 3D 实验进行物理缩放。和 Stańczyk 等人，分别。通过将模拟与实验结果相匹配，我们考虑了 12 个化学反应中的 5 个化学反应。我们调整了数值模拟中使用的化学反应参数以匹配实验数据。