Effect of oxygen deficient conditions on oxidative spontaneous combustion characteristics of raw coal and water-immersed air-dried bituminous coal
Process Safety and Environmental Protection, ISSN: 0957-5820, Vol: 196, Page: 106859
2025
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Article Description
The effects of low-oxygen conditions on the oxidation and spontaneous combustion characteristics of raw coal and water-immersed air-dried bituminous coal was studied. Via analysis, including Fourier Transform InfraRed (FTIR), ThermoGravimetry (TG) and Differential Scanning Calorimetry (DSC), the chemical groups and elemental composition of the coal samples were studied, as well as the impact of oxygen concentration on changes in weight and heat release of the coal samples. The water immersed coal sample ignites at a lower temperature compared to the raw sample. The water immersed coal sample undergoes spontaneous combustion at a relatively fast rate, requiring a lower temperature for complete reaction, but it releases less heat after combustion compared to the raw coal sample. In an oxygen-deficient environment, the overall exothermic oxidation process of coal exhibits a lag, with the lag effect becoming more pronounced as the oxygen deficiency intensifies, especially noticeable in high-temperature stages. The impact of water immersion and air drying on the spontaneous combustion of coal is lower compared to the influence of oxygen concentration on coal.
Bibliographic Details
Elsevier BV
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