Abstract To investigate the changes of organic and inorganic substances produced by coal heat pyrolysis in the dry distillation channel in coal underground gasification, lignite coal was used as the object of this study. The pyrolysis reaction in the range of room temperature to 600 °C was carried out using coal pyrolysis reactor of high-temperature tubular heating furnace. SEM, FTIR and x-ray diffractometer analyzed the sample. The results show: The increase in pyrolysis temperature leads to a decrease in tar yield and an increase in gas and char coke yield. The surface of the coal sample shows molten state and gradually harden. The expansion of porosity accelerates the transportation of gas in coal seams. Coal pyrolysis is prone to hydrogen bond breakage at 400 °C. In addition, the content of unsaturated halogenated hydrocarbons increases under pyrolysis.

中文翻译：

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煤炭地下气化通道煤热解物性研究

摘要 为研究煤炭地下气化干馏通道中煤炭热解产生的有机物和无机物的变化，以褐煤为研究对象。使用高温管式加热炉煤热解反应器在室温至600℃范围内进行热解反应。SEM、FTIR 和 X 射线衍射仪分析了样品。结果表明：热解温度升高导致焦油产率降低，气体和焦炭产率增加。煤样表面呈熔融状态并逐渐硬化。孔隙度的扩大加速了瓦斯在煤层中的输送。煤热解在 400 °C 时容易发生氢键断裂。此外，