Abstract
ABSTRACT Focused on the insufficient efficacy of conventional flame retardants in mitigating coal spontaneous combustion (CSC), a novel composite flame retardant synthesized from polyethylene glycol (PEG) 2000 and citric acid (CA) is proposed. Through Differential Scanning Calorimetry (DSC) and Fourier Transform Infrared Spectroscopy (FTIR) experiments, the inhibitory kinetics and mechanisms were conducted. By enhancing heat absorption rate and enthalpy, with a significant increase by 90 kJ·mol−1 of activation energy, CSC resistance is improved. CA-metal ion interaction raises activation energy to inhibit methyl/methylene oxidation, while PEG disrupts aromatic oxidation by generating H ions upon hydration. This composite retardant offers a promising avenue for CSC mitigation in coal, enhancing coal fire safety.
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