Abstract
The action of nanosecond laser pulses (wavelength 532 nm, pulse length 14 ns, pulse repetition rate 6 Hz, energy density of laser radiation 0.2–0.6 J/cm2) in G and Zh coal pellets is investigated, in an argon atmosphere. The gaseous products of sample pyrolysis include H2, CH4, C2H2, CO, and CO2. The content of the gaseous components is determined as a function of the laser energy density. In the range 0.2–0.4 J/cm2, the volume of flammable gases formed (referred to the mass loss of the sample) increases; at higher energy densities, practically no change in volume is observed. The gross calorific value of the flammable gases increases linearly from ~8–10 to 19 MJ/m3 with increase in energy density of the laser radiation from 0.2 to 0.6 J/cm2. A nanosecond pulse of energy density more than 0.4 J/cm2 results in intense ablation of the pellets containing 0.005 wt % polyvinyl alcohol. The coal pellets that contain no binder break down under the action of a nanosecond laser pulse of energy density exceeding 0.2 J/cm2.
REFERENCES
Capuano, L., International energy outlook 2018 (IEO2018). https:// www.eia.gov/pressroom/presentations/capuano_07242018.pdf. Cited September 20, 2022.
Kontorovich, A.E., Epov, M.I., and Eder, L.V., Long-term and medium-term scenarios and factors in world energy perspectives for the 21st century, Russ. Geol. Geophys., 2014, vol. 55, nos. 5–6, pp. 534–543. https://doi.org/10.1016/j.rgg.2014.05.002
Solomon, P.R., Fletcher, T.H., and Pugmire, R.J., Progress in coal pyrolysis, Fuel, 1993, vol. 72, no. 5, pp. 587–597. https://doi.org/10.1016/0016-2361(93)90570-r
Hu, H., Zhou, Q., Zhu, S., Meyer, B., Krzack, S., and Chen, G., Product distribution and sulfur behavior in coal pyrolysis, Fuel Process. Technol., 2004, vol. 85, nos. 8–10, pp. 849–861. https://doi.org/10.1016/j.fuproc.2003.11.030
Zhao, Yu., Hu, H., Jin, L., Wu, B., and Zhu, S., Pyrolysis behavior of weakly reductive coals from northwest China, Energy Fuels, 2009, vol. 23, no. 2, pp. 870–875. https://doi.org/10.1021/ef800831y
Matsuoka, K., Akiho, H., Xu, W.-Ch., Gupta, R., Wall, T., and Tomita, A., The physical character of coal char formed during rapid pyrolysis at high pressure, Fuel, 2005, vol. 84, no. 1, pp. 63–69. https://doi.org/10.1016/j.fuel.2004.07.006
Li, Ch.-Zh., Some recent advances in the understanding of the pyrolysis and gasification behaviour of Victorian brown coal, Fuel, 2007, vol. 86, nos. 12–13, pp. 1664–1683. https://doi.org/10.1016/j.fuel.2007.01.008
Mushtaq, F., Mat, R., and Ani, F.N., A review on microwave assisted pyrolysis of coal and biomass for fuel production, Renewable Sustainable Energy Rev., 2014, vol. 39, pp. 555–574. https://doi.org/10.1016/j.rser.2014.07.073
Zhang, K., Li, Ya., He, Yo., Wang, Z., Li, Q., Kuang, M., Ge, L., and Cen, K., Volatile gas release characteristics of three typical Chinese coals under various pyrolysis conditions, J. Energy Inst., 2017, vol. 91, no. 6, pp. 1045–1056. https://doi.org/10.1016/j.joei.2017.07.004
Abdelsayed, V., Shekhawat, D., Smith, M.W., Link, D., and Stiegman, A.E., Microwave-assisted pyrolysis of Mississippi coal: A comparative study with conventional pyrolysis, Fuel, 2018, vol. 217, pp. 656–667. https://doi.org/10.1016/j.fuel.2017.12.099
Xie, X., Zhao, Ya., Qiu, P., Lin, D., Qian, J., Hou, H., and Pei, J., Investigation of the relationship between infrared structure and pyrolysis reactivity of coals with different ranks, Fuel, 2018, vol. 216, pp. 521–530. https://doi.org/10.1016/j.fuel.2017.12.049
Han, J., Liu, D., Qin, L., Chen, W., and Xing, F., A modified temperature integral approximation formula and its application in pyrolysis kinetic parameters of waste tire, Energy Sources, Part A: Recovery, Util., Environ. Eff., 2018, vol. 40, no. 2, pp. 220–226. https://doi.org/10.1080/15567036.2017.1410596
Ye, C.-P., Huang, H.-J., Li, X.-H., Li, W.-Yi., and Feng, J., The oxygen evolution during pyrolysis of HunlunBuir lignite under different heating modes, Fuel, 2017, vol. 207, pp. 85–92. https://doi.org/10.1016/j.fuel.2017.06.062
Cai, H.-Y., Güell, A.J., Chatzakis, I.N., Lim, J.-Y., Dugwell, D.R., and Kandiyoti, R., Combustion reactivity and morphological change in coal chars: Effect of pyrolysis temperature, heating rate and pressure, Fuel, 1996, vol. 75, no. 1, pp. 15–24. https://doi.org/10.1016/0016-2361(94)00192-8
Han, J., Zhang, L., Kim, H.J., Kasadani, Yu., Li, L., and Shimizu, T., Fast pyrolysis and combustion characteristic of three different brown coals, Fuel Process. Technol., 2018, vol. 176, pp. 15–20. https://doi.org/10.1016/j.fuproc.2018.03.010
Aguado, R., Olazar, M., Vélez, D., Arabiourrutia, M., and Bilbao, J., Kinetics of scrap tyre pyrolysis under fast heating conditions, J. Anal. Appl. Pyrolysis, 2005, vol. 73, no. 2, pp. 290–298. https://doi.org/10.1016/j.jaap.2005.02.006
Hanson, R.L., Vanderborgh, N.E., and Brookins, D.G., Characterization of coal by laser pyrolysis gas chromatography, Anal. Chem., 1977, vol. 49, no. 3, pp. 390–395. https://doi.org/10.1021/ac50011a016
Maswadeh, W., Arnold, N.S., McClennen, W.H., Tripathi, A., DuBow, J., and Meuzelaar, H.L.C., Development of a laser devolatilization gas chromatography/mass spectrometry technique for single coal particles, Energy Fuels, 1993, vol. 7, no. 6, pp. 1006–1012. https://doi.org/10.1021/ef00042a044
Pyatenko, A.T., Bukhman, S.V., Lebedinskii, V.S., Nasarov, V.M., and Tolmachev, I.Ya., Experimental investigation of single coal particle devolatilization by laser heating, Fuel, 1992, vol. 71, no. 6, pp. 701–704. https://doi.org/10.1016/0016-2361(92)90175-n
Karn, F.S., Friedel, R.A., and Sharkeyjr, A.S., Studies of the solid and gaseous products from laser pyrolysis of coal, Fuel, 1972, vol. 51, no. 2, pp. 113–115. https://doi.org/10.1016/0016-2361(72)90059-2
Li, Yu., Hua, F., An, H., and Cheng, Yi., Experimental study of laser pyrolysis of coal and residual oil, Fuel, 2021, vol. 283, p. 119290. https://doi.org/10.1016/j.fuel.2020.119290
Phuoc, T.X., Mathur, M.P., Ekmann, J.M., and Durbetaki, P., High-energy Nd-YAG laser ignition of coals: Modeling analysis, Combust. Flame, 1993, vol. 94, no. 4, pp. 349–362. https://doi.org/10.1016/0010-2180(93)90119-n
Aduev, B.P., Nurmukhametov, D.R., Kraft, Ya.V., and Ismagilov, Z.R., Glow spectral characteristics of the hard coal particles surface during the action of laser pulses in the free generation mode, Opt. Spectrosc., 2020, vol. 128, no. 12, pp. 2008–2014. https://doi.org/10.1134/s0030400x20120838
Aduev, B.P., Kraft, Ya.V., Nurmukhametov, D.R., and Ismagilov, Z.R., Ignition of different marks of coal by laser pulses in the free-running mode, Chem. Sustainable Dev., 2019, vol. 27, no. 6, pp. 549–555. https://doi.org/10.15372/CSD2019172
Aduev, B.P., Nurmukhametov, D.R., Kraft, Ya.V., and Ismagilov, Z.R., Ignition of different metamorphic grade coals by free-running laser pulses, Opt. Spectrosc., 2020, vol. 128, no. 3, pp. 429–435. https://doi.org/10.1134/s0030400x20030029
Aduev, B.P., Nurmukhametov, D.R., Kraft, Ya.V., and Ismagilov, Z.R., The ignition energy characteristics and glow kinetics of the flames of dispersed coal particles of different ranks under the action of laser pulses, Chem. Sustainable Dev., 2020, vol. 28, no. 6, pp. 518–526. https://doi.org/10.15372/CSD2020260
Kraft, Ya.V., Nurmukhametov, D.R., Aduev, B.P., and Ismagilov, Z.R., Pyrolysis of Kaichak lignite under the laser radiation exposure, Vestn. Kuzbassk. Gos. Tekh. Univ., 2019, no. 3, pp. 5–16. https://doi.org/10.26730/1999-4125-2019-3-5-15
Dry, M.E., The Fischer–Tropsch process: 1950–2000, Catal. Today, 2002, vol. 71, nos. 3–4, pp. 227–241. https://doi.org/10.1016/S0920-5861(01)00453-9
Fedorova, N.I., Mikhailova, E.S., and Ismagilov, Z.R., Dependence of the combustion heat of coal on its chemical composition, Chem. Sustainable Dev., 2015, vol. 23, no. 2, pp. 135–138.
GOST (State Standard) 27313-2015: Solid mineral fuel. Symbols of quality indicators and calculation of analyses to different bases, 2017.
McAllister, S., Chen, J.-Yu., and Fernandez-Pello, A.C., Fundamentals of Combustion Processes, Mechanical Engineering Series, New York: Springer, 2011. https://doi.org/10.1007/978-1-4419-7943-8
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Financial support was provided by the Russian Science Foundation (grant 22-13-20041, https://rscf.ru/project/22-13-20041/) and by the Kemerovo Region in the Kuznetsk Basin (contract 2, March 22, 2022).
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Kraft, Y.V., Aduev, B.P., Nelubina, N.V. et al. Pyrolysis of Coal by Nanosecond Laser Pulses. Coke Chem. 66, 449–457 (2023). https://doi.org/10.3103/S1068364X23701119
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DOI: https://doi.org/10.3103/S1068364X23701119