Technologies of coatings employment for coals oxidation resistance improvement

Svetlana Epshtein; Daria Gavrilova; Elena Kossovich; Valeria Nesterova; Izabella Nikitina; Sergey Fedorov; Svetlana Epshtein; Daria Gavrilova; Elena Kossovich; Valeria Nesterova; Izabella Nikitina; Sergey Fedorov

doi:10.3934/energy.2019.1.20

AIMS Energy

2019, Volume 7, Issue 1: 20-30. doi: 10.3934/energy.2019.1.20

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Research article

Technologies of coatings employment for coals oxidation resistance improvement

1.
Scientific and Training Testing Laboratory of Physics and Chemistry of Coals, National University of Science and Technology “MISiS”, 4, Leninsky prospekt, Moscow, 119049, Russian Federation
2.
ENELEX RUSSLAND LLC, 35 Mosfilmovskaya Street, Moscow, 119330, Russian Federation

Received: 22 November 2018 Accepted: 03 January 2019 Published: 07 January 2019

The paper is dedicated to studying of the efficiency of application of the dust control agents not only for their original aims, but also for increasing of oxidation resistance of the solid fossil fuels. The complex investigation included: studying of coals quality alteration after treatment by the selected solution, scanning electron microscopy for investigation of their surface topology changes and, finally, ozonating treatment at low ozone concentrations with kinetic modeling for evaluation of oxidation resistivity. As it was expected, application of the selected solution allows no quality loss for coals. Scanning electron microscopy allowed to visualize the mechanism of working of the dust control agent. It revealed that the studied solution forms a thin smooth film around coal particles. This film tightly binds all the fine particles that were already formed and stored at the coal surface. Also, the solution tends to cover the surface thus decreasing the accessibility of the surface to active oxygen. The latter was proved by treated and untreated coals ozonating processing at low concentrations of ozone. The applied kinetic model allowed evaluation of the total coals activity to ozone decomposition. It was found that the treated coals have twice as low total activity to ozone decomposition as compared with the untreated ones. The latter parameter is closely related to coals oxidation resistivity (the lower the coals activity, the higher the coals oxidation resistivity). Therefore, it was finally concluded that application of the studied dust control agent allows for significant increase of sought-for quality indicator.
- coal,
- coal dust suppressant,
- coating,
- oxidation resistance,
- quality,
- ozone,
- kinetic modeling
Citation: Svetlana Epshtein, Daria Gavrilova, Elena Kossovich, Valeria Nesterova, Izabella Nikitina, Sergey Fedorov. Technologies of coatings employment for coals oxidation resistance improvement[J]. AIMS Energy, 2019, 7(1): 20-30. doi: 10.3934/energy.2019.1.20

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Abstract

The paper is dedicated to studying of the efficiency of application of the dust control agents not only for their original aims, but also for increasing of oxidation resistance of the solid fossil fuels. The complex investigation included: studying of coals quality alteration after treatment by the selected solution, scanning electron microscopy for investigation of their surface topology changes and, finally, ozonating treatment at low ozone concentrations with kinetic modeling for evaluation of oxidation resistivity. As it was expected, application of the selected solution allows no quality loss for coals. Scanning electron microscopy allowed to visualize the mechanism of working of the dust control agent. It revealed that the studied solution forms a thin smooth film around coal particles. This film tightly binds all the fine particles that were already formed and stored at the coal surface. Also, the solution tends to cover the surface thus decreasing the accessibility of the surface to active oxygen. The latter was proved by treated and untreated coals ozonating processing at low concentrations of ozone. The applied kinetic model allowed evaluation of the total coals activity to ozone decomposition. It was found that the treated coals have twice as low total activity to ozone decomposition as compared with the untreated ones. The latter parameter is closely related to coals oxidation resistivity (the lower the coals activity, the higher the coals oxidation resistivity). Therefore, it was finally concluded that application of the studied dust control agent allows for significant increase of sought-for quality indicator.

References

[1]	Chen S, Wang H, Li Y, et al. (2014) Theoretical and numerical analysis of coal dust separated by centrifugal force for working and heading faces. Int J Coal Sci Technol 1: 338–345. doi: 10.1007/s40789-014-0039-9
[2]	Colinet J, Listak JM, Organiscak JA, et al. (2010) Best practices for dust control in coal mining. Cent Dis Control Prevent 01: 17–36.
[3]	Ji Y, Ren T, Wynne P, et al. (2015) A comparative study of dust control practices in Chinese and Australian longwall coal mines. Int J Min Sci Technol 26: 199–208.
[4]	Jiang H, Du C, Dong J (2017) Investigation of rock cutting dust formation and suppression using water jets during mining. Powder Technol 307: 99–108. doi: 10.1016/j.powtec.2016.11.029
[5]	Kanjiyangat V, Hareendran M (2017) Coal dust exposure reduction using water mist system: A case study. J Chem Heal Saf 25: 1–5.
[6]	Li Q, Lin B, Zhao S, et al. (2013) Surface physical properties and its effects on the wetting behaviors of respirable coal mine dust. Powder Technol 233: 137–145. doi: 10.1016/j.powtec.2012.08.023
[7]	Kollipara VK, Chugh YP, Mondal K (2014) Physical, mineralogical and wetting characteristics of dusts from Interior Basin coal mines. Int J Coal Geol 127: 75–87. doi: 10.1016/j.coal.2014.02.008
[8]	Zhou G, Fan T, Ma Y (2017) Preparation and chemical characterization of an environmentally-friendly coal dust cementing agent. J Chem Technol Biotechnol 92: 2699–2708. doi: 10.1002/jctb.5291
[9]	Naiguo W, Wen N, Weimin C, et al. (2014) Experiment and research of chemical de-dusting agent with spraying dust-settling. Procedia Eng 84: 764–769. doi: 10.1016/j.proeng.2014.10.494
[10]	Ding C, Nie B, Yang H, et al. (2011) Experimental research on optimization and coal dust suppression performance of magnetized surfactant solution. Procedia Eng 26: 1314–1321. doi: 10.1016/j.proeng.2011.11.2306
[11]	Xi Z, Feng Z, Li A (2017) Synergistic coal dust control using aqueous solutions of thermoplastic powder and anionic surfactant. Colloid Surface A 520: 864–871. doi: 10.1016/j.colsurfa.2017.02.072
[12]	Huang Q, Honaker R (2016) Recent trends in rock dust modifications for improved dispersion and coal dust explosion mitigation. J Loss Prevent Proc 41: 121–128. doi: 10.1016/j.jlp.2016.03.009
[13]	Zhou Q, Qin B, Ma D, et al. (2017) Novel technology for synergetic dust suppression using surfactant-magnetized water in underground coal mines. Process Saf Environ 109: 631–638.
[14]	Fan T, Zhou G, Wang J (2018) Preparation and characterization of a wetting-agglomeration-based hybrid coal dust suppressant. Process Saf Environ 113: 282–291. doi: 10.1016/j.psep.2017.10.023
[15]	Yan W, Hoekman SK (2012) Dust Suppression with Glycerin from Biodiesel Production: A Review. J Environ Prot 3: 218–224.
[16]	Wang D, Dou G, Zhong X, et al. (2014) An experimental approach to selecting chemical inhibitors to retard the spontaneous combustion of coal. Fuel 117: 218–223. doi: 10.1016/j.fuel.2013.09.070
[17]	Wang G, Yan G, Zhang X, et al. (2016) Research and development of foamed gel for controlling the spontaneous combustion of coal in coal mine. J Loss Prevent Proc 44: 474–486. doi: 10.1016/j.jlp.2016.10.013
[18]	Cheng W, Hu X, Xie J, et al. (2017) An intelligent gel designed to control the spontaneous combustion of coal: Fire prevention and extinguishing properties. Fuel 210: 826–835. doi: 10.1016/j.fuel.2017.09.007
[19]	Hu ZX, Hu XM, Cheng WM, et al. (2018) Performance optimization of one-component polyurethane healing agent for self-healing concrete. Constr Build Mater 179: 151–159. doi: 10.1016/j.conbuildmat.2018.05.199
[20]	AMS 1000. Chemical Dust Suppression for Coal, Metal and Cement Applications. Available from: http://almex.com/en/products/275/dust-suppression-system.
[21]	Epshtein SA, Gavrilova DI, Kossovich EL, et al. (2016) Thermal methods exploitation for coals propensity to oxidation and self-ignition study. Gorn Zhurnal, 100–104.
[22]	EPA (2009) Greenhouse Gas Monitoring Technologies. Available from: https://archive.epa.gov/nrmrl/archive-etv/web/pdf/p1005ku4.pdf.
[23]	Kaminskii V, Kossovich E, Epshtein SA, et al. (2017) Activity of coals of different rank to ozone. AIMS Energy 5: 960–973. doi: 10.3934/energy.2017.6.960
[24]	Obvintseva LA, Sukhareva IP, Epshtein SA, et al. (2017) Interaction of coals with ozone at low concentrations. Solid Fuel Chem 51: 155–159. doi: 10.3103/S0361521917030077

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