Abstract：
The interaction between water and coal is of great significance to the study of coal spontaneous combustion (CSC) in humid mine environments. Here, using an isotope tracing method to trace oxygen atoms in water, the role of water in the formation of CO, CO2, product water, and other substances during CSC was quantitatively studied through thermogravimetry coupled with mass spectrometry (TG-MS). In addition, Pearson correlation analysis was used to evaluate the relationships between the amounts of CO and CO2 generated during CSC and the different functional groups. The migration and transformation paths of oxygen atoms in water were analyzed. The results showed that water participated in the CSC reaction to produce CO, CO2, and product water in a dynamic, temperature-dependent process. CO and CO2 were formed through different reaction paths involving reactions between water and aldehyde and carboxyl groups. Further, carboxyl groups were also involved in the reaction with coal to form product water. The results from this study are helpful for understanding the influence of water in each stage of CSC, thereby aiding in its prevention and control.
摘要：
水与煤的相互作用对研究潮湿矿井环境中的煤自燃(CSC)具有重要意义。这里,使用同位素示踪方法来追踪水中的氧原子，水在CO形成中的作用，二氧化碳，产品水，通过热重分析与质谱联用（TG-MS）对CSC过程中的其他物质进行了定量研究。此外,Pearson相关性分析用于评估CSC过程中产生的CO和CO2的量与不同官能团之间的关系。分析了水中氧原子的迁移和转化途径。结果表明,水参与CSC反应生成CO,二氧化碳和产品水处于动态状态，温度依赖性过程。CO和CO2是通过不同的反应路径形成的，该反应路径涉及水与醛和羧基之间的反应。Further,羧基也参与与煤形成产物水的反应。这项研究的结果有助于了解水对CSC各阶段的影响，从而有助于其预防和控制。
