Journal
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
Volume 42, Issue 3, Pages 1158-1171Publisher
WILEY
DOI: 10.1002/er.3915
Keywords
commercial inhibitors; Fourier transform infrared spectroscopy; inhibition effects; kinetics analysis; thermosensitive hydrogel
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Funding
- External Cooperation Program of Chinese Academy of Sciences [GJHZ-1726]
- Shaanxi Natural Science Foundation [2014-JM7276]
- National Natural Science Foundation of China [5113-4019, 5150-418]
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Five inhibitorsZn/Mg/Al-CO3 layered double hydroxides (LDHs), thermosensitive hydrogel (P(NIPA-co-SA)), diammonium phosphate ((NH4)(2)HPO4), sodium phosphate (Na3PO4), and magnesium chloride (MgCl2)commonly used to forestall the spontaneous combustion of anthracite and coke coal were investigated in this study, and the inhibition effects were quantified. According to the results of thermogravimetry, differential scanning calorimetry, Fourier transform infrared spectroscopy, and kinetic analysis, Zn/Mg/Al-CO3-LDHs, P(NIPA-co-SA), and (NH4)(2)HPO4 all exert substantial inhibiting effects on anthracite and coke coal. Specifically, P(NIPA-co-SA) was altered during the liquid-to-gel phase, which isolated the oxygen from the coal surface and produced an endothermic reaction that decreased the environmental temperature; this reaction further inhibited spontaneous combustion. Conversely, MgCl2 promoted a combustion reaction and reduced the apparent activation energy of coal, increasing the risk of spontaneous combustion. This study provides a reference for selecting suitable inhibitors to prevent the spontaneous combustion of coal.
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