Experimental study on the oxidation kinetics of coal in typical coal mining areas of the Southern Junggar coalfield, Xinjiang, China

Abstract Coal spontaneous combustion (CSC) is a disaster associated with coal mining that leads to loss of resources and environmental human health issues. To investigate kinetic characteristics for oxidation coal, three samples were collected from different areas in the Southern Junggar coalfield. Subsequently, ground into particle sizes tested using microscopic macroscopic methods, including thermal gravimetric analysis, Fourier transform infrared spectroscopy, X-ray diffraction, temperature-programmed oxidation. The results obtained are as follows: sharpest absorption peak (002) indicates graphitization high. Furthermore, show SKS sample prone combustion; greater aromatic hydrocarbon content is, more difficult it CSC occur, while opposite true oxygen-containing functional groups. data confirmed this conclusion; rate generation CO 2 controlled possibility at 110 °C provided an indication temperature. During dehydration stage, WD had lowest activation energy, indicating was most susceptible combustion. energy found < 0.075 mm, size one factors affecting significantly lower than combustion, which showed oxygen reaction likely occur stage. Based on DSC curves, largest exothermicity, would ignite readily.