With the expansion of coal mining operations, ensuring safe production has become increasingly challenging, and spontaneous combustion of coal (CSC) has become a serious constraint on the safe development of coal mines. Chemical inhibitors are the primary technical means of preventing and controlling spontaneous coal combustion. In this study, a composite inhibitor (FA-SPA) with synergistic effects of both physical and chemical inhibition was developed by optimizing the compounding of ferulic acid and superabsorbent resin. Using Fourier transform infrared spectroscopy, programmed temperature rise instruments, and other analytical tools, the inhibitory effects and mechanisms of the composite inhibitor were analyzed from multiple perspectives. he results indicate that FA-SPA can significantly suppress coal oxidation behavior, reducing CO emissions by 50.8% at 210°C compared with raw coal and maintaining CO concentrations below 5500 ppm throughout the heating process, while effectively delaying the rapid increase in oxygen consumption by approximately 10°C. FA-SPA can significantly reduce the oxidative decomposition rates of alkane, carbonyl, carboxyl, and other functional groups in coal, thereby suppressing the propagation of chain oxidation reactions. At low temperatures, the carboxyl content in the inhibited coal samples increased significantly compared to that in the raw coal, which is related to the introduction of -COOH groups by FA-SPA. As the temperature increases, FA-SPA, through hydrogen bonding and radical scavenging, decreases the efficiency of oxidation chain growth, forming an oxygen-rich shell layer composed of hydroxyl, carbonyl, and carboxyl groups, which limits the transfer of oxygen and heat. Quantum chemical analysis shows that FA-SPA undergoes electron transfer reactions with free radicals in coal (such as ·OH, ·CH 3 , C = O·, and COO·), lowers the reaction energy barrier, and suppresses the activity of free radicals, thereby effectively delaying coal oxidation. Thermodynamic analysis further indicated that the reaction between FA and coal free radicals is exothermic; however, compared to coal oxidation reactions, the heat released by the FA reaction is smaller, which helps to reduce heat accumulation during coal oxidation. This study provides a reference for the selection and optimization of coal spontaneous combustion inhibitors.
Liang et al. (Mon,) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: