Abstract
In order to find a low-cost and better performance inhibitor, this study chose the widely used and effective inhibitors NH4HCO3, ammonium polyphosphate (APP) and waterborne polyacrylate (PA) and designed the TG–DSC and FTIR experiments of coal samples with three kinds of inhibitors to study the effects of different inhibitors on various parameters of spontaneous combustion of coal. The results showed that the mass loss rate of C&APP and C&PA was lower than that of raw coal, and the enthalpy and oxygen absorption quantity of coal obviously reduced, and the content of gas products also reduced to some extent. The two kinds of inhibitors had good retardant effect, but it was not good for C&NH4HCO3. Through the curve-fitting analysis of infrared spectrums, the intrinsic mechanism of retardant effect of PA was studied in depth, and it was found that PA can reduce the decomposition of aliphatic structure and inhibit the formation of oxygen-containing functional groups of coal. Further kinetic analysis was carried out by using the isoconversional method. It is found that adding PA increases activation energy in the oxygen absorption and mass gain stage of coal, which have retardant effect in the primary stage of spontaneous combustion of coal.
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References
Song Z, Kuenzer C. Coal fires in China over the last decade: a comprehensive review. Int J Coal Geol. 2014;133:72–99.
Watanabe WS, Zhang DK. The effect of inherent and added inorganic matter on low-temperature oxidation reaction of coal. Fuel Process Technol. 2001;74(3):145–60.
Sujanti W, Zhang DK. Investigation into the role of inherent inorganic matter and additives in low-temperature oxidation of a victorian brown coal. Combust Sci Technol. 2000;152(1):99–114.
Tang Y. Inhibition effect of phosphorus flame retardants on the fire disasters induced by spontaneous combustion of coal. J Spectrosc. 2017;2017(9):1–10.
George CW, Blakely AD, Johnson GM, Simmerman D, Johnson CW. Evaluation of liquid ammonium polyphosphate fire retardants. USDA For Serv Gen Tech Rep INTUS (USA) no 41 1977. 1977.
Camino G, Grassie N, Mcneill IC. Influence of the fire retardant, ammonium polyphosphate, on the thermal degradation of poly(methy methacrylate). J Polym Sci Part A Polym Chem. 1978;16(1):95–106.
Liodakis S, Vorisis D, Agiovlasitis IP. Testing the retardancy effect of various inorganic chemicals on smoldering combustion of Pinus halepensis needles. Thermochimi Acta. 2006;444(2):157–65.
Bourbigot S, Duquesne S. Fire retardant polymers: recent developments and opportunities. J Mater Chem. 2007;17(22):2283–300.
Slovák V, Taraba B. Urea and CaCl2 as inhibitors of coal low-temperature oxidation. J Therm Anal Calorim. 2012;110(1):363–7.
Smith AC, Miron Y, Lazzara CP. Inhibition of spontaneous combustion of coal. Report of Investigations/1988. 1988.
Li L, Zheng Z, Qunying W, Li J, Yifeng Y. Polyethylene as a novel low-temperature inhibitor for lignite coal. J Therm Anal Calorim. 2014;117(3):1321–5.
Qi X, Wei C, Li Q, Zhang L. Controlled-release inhibitor for preventing the spontaneous combustion of coal. Nat Hazards. 2016;82(2):1–11.
Qi X, Li Q, Zhang H, **n H. Thermodynamic characteristics of coal reaction under low oxygen concentration conditions. J Energy Inst. 2016;90(4):S1743967116300204.
Cheng Y, Yan B, Li T, Cheng Y. Kinetic modeling of deoiled asphaltene particle pyrolysis in thermogravimetric analysis. J Therm Anal Calorim. 2016;124(3):1661–70.
Slovák V, Taraba B. Effect of experimental conditions on parameters derived from TG–DSC measurements of low-temperature oxidation of coal. J Therm Anal Calorim. 2010;101(2):641–6.
Zhang W, Jiang S, Wang K, Wang L, Xu Y, Wu Z, et al. Thermogravimetric dynamics and FTIR analysis on oxidation properties of low-rank coal at low and moderate temperatures. Coal Prep. 2015;35(1):39–50.
Song Z, Wu D, Jiang J, Pan X. Thermo-solutal buoyancy driven air flow through thermally decomposed thin porous media in a U-shaped channel: Towards understanding persistent underground coal fires. Appl Therm Eng. 2019;159:113948.
Song Z, Fan H, Jiang J, Li C. Insight into effects of pore diffusion on smoldering kinetics of coal using a 4-step chemical reaction model. J Loss Prev Process Ind. 2017;48:312–9.
Song H, Liu G, Zhang J, Wu J. Pyrolysis characteristics and kinetics of low rank coals by TG-FTIR method. Fuel Process Technol. 2017;156:454–60.
Feng L, Zhao G, Zhao Y, Zhao M, Tang J. Construction of the molecular structure model of the Shengli lignite using TG-GC/MS and FTIR spectrometry data. Fuel. 2017;203:S0016236117305379.
**n H-h, Wang D-m, Qi X-y, Zhong X-x, Ma L-y, Dou G-l, et al. Oxygen consumption and chemisorption in low-temperature oxidation of sub-bituminous pulverized coal. Spectrosc Lett. 2018;51(2):1–8.
Ünal S, Wood DG, Harris IJ. Effects of drying methods on the low temperature reactivity of Victorian brown coal to oxygen. Fuel. 1992;71(2):183–92.
Teng H, Hsieh CT. Activation energy for oxygen chemisorption on carbon at low temperatures. Ind Eng Chem Res. 2008;38(1):11–8.
Li B, Chen G, Zhang H, Sheng C. Development of non-isothermal TGA–DSC for kinetics analysis of low temperature coal oxidation prior to ignition. Fuel. 2014;118(8):385–91.
Aboyade AO, Görgens JF, Carrier M, Meyer EL, Knoetze JH. Thermogravimetric study of the pyrolysis characteristics and kinetics of coal blends with corn and sugarcane residues. Fuel Process Technol. 2013;106(2):310–20.
Łabojko G, Kotyczka-Morańska M, Plis A, Ściążko MS. Kinetic study of polish hard coal and its char gasification using carbon dioxide. Thermochimi Acta. 2012;549(23):158–65.
Song Z, Huang X, Luo M, Gong J, Pan X. Experimental study on the diffusion–kinetics interaction in heterogeneous reaction of coal. J Therm Anal Calorim. 2017;129(3):1–13.
Mocioiu OC, Zaharescu M, Jitianu G, Budrugeac P. Kinetic parameters determination in non-isothermal conditions for the crystallisation of a silica-soda-lead glass. J Therm Anal Calorim. 2006;86(2):429–36.
Chunxiu G, Yufang S, Donghua C. Comparative method to evaluate reliable kinetic triplets of thermal decomposition reactions. J Therm Anal Calorim. 2004;76(1):203–16.
Yuan L, Smith AC. Experimental study on CO and CO2 emissions from spontaneous heating of coals at varying temperatures and O2 concentrations. J Loss Prev Process Ind. 2013;26(6):1321–7.
Liu X, Chen M, Wei YJF. Kinetics based on two-stage scheme for co-combustion of herbaceous biomass and bituminous coal. Fuel. 2015;143:577–85.
Longfei G, Haibin Z, Yajie W, Jun Z. Thermal behavior and kinetic study on the pyrolysis of lean coal blends with thermally dissolved coal. J Therm Anal Calorim. 2019;136(2):903–12.
Chang’an W, Yuanhang Z, Pengqian W, **** Z, Yongbo D, Defu C. Effects of silicoaluminate oxide and coal blending on combustion behaviors and kinetics of zhundong coal under oxy-fuel condition. J Therm Anal Calorim. 2018;134(3):1975–86.
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This study is supported by National Key Research and Development Program of China (No:2016YFC0801800) and National Nature Science Foundation of China (No: 51774291 and 51864045).
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Tan, B., Wei, H., Zhang, F. et al. Effect of inhibitors on the thermodynamics and kinetics of spontaneous combustion of coal. J Therm Anal Calorim 140, 295–307 (2020). https://doi.org/10.1007/s10973-019-08771-y
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DOI: https://doi.org/10.1007/s10973-019-08771-y