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OXYGEN-ENRICHED COMBUSTION MECHANISM OF LIGNITE

ABSTRACT
In this work, thermogravimetric experiments were carried out in a thermogravi-metric analyzer under O2/N2 atmosphere with an oxygen content ranging from 21 vol.% to 70 vol.%. Malek method combined with iso-conversional method and non-isothermal method was employed to determine the burning dynamical function of lignite in high temperature burning region with different oxygen concentrations. The results indicated that the lignite has different burning dynamical function in different oxygen conditions. The combustion mechanism function of lignite belonged to 3-D model when the oxygen concentration is below 30%. The combustion mechanism of lignite belongs to a random successive nucleation growth model when the oxygen concentration is between 40% and 50%. Kinetic burning model of lignite in high burning temperature region with different oxygen concentrations was established. The kinetic parameters were obtained from the kinetic burning model of lignite using Kissinger-Akah-Sunose method.
KEYWORDS
PAPER SUBMITTED: 2018-05-12
PAPER REVISED: 2019-06-30
PAPER ACCEPTED: 2019-08-13
PUBLISHED ONLINE: 2020-06-21
DOI REFERENCE: https://doi.org/10.2298/TSCI2004411C
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2020, VOLUME 24, ISSUE 4, PAGES [2411 - 2418]
REFERENCES
  1. Yin, L. Q., Lignite Resources and Utilization Outlook in China, (in Chinese), Coal Science and Technology, 32 (2004), 2, pp. 12-14
  2. Zhou, Z. J. et al., Oxy-Fuel Combustion Characteristics and Kinetic Parameters of Lignite Coal from thermo-gravimetric Data, Thermochimica Acta, 553 (2013), 2, pp. 54-59
  3. Daood, S. S., et al., Deep-Staged, Oxygen Enriched Combustion of Coal, Fuel, 101 (2012), Nov., pp. 187-196
  4. Arisoy, A., et al., Reaction Kinetics of Coal Oxidation at Low Temperatures, Fuel, 159 (2015), Nov., pp. 412-417
  5. Chen, X. Y., et al., Thermal Analyses of the Lignite Combustion in Oxygen-Enriched Atmosphere, Thermal Science, 19 (2015), 3, pp. 801-811
  6. Zhang, Y. F., et al., Oxygen-Enriched Combustion of Lignite, Thermal Science, 19 (2015), 4, pp. 1389-1392
  7. Tang, Y. T., et al., Oxidation Mechanism and Non-isothermal Kinetic Studies on Carbonate iron ore by Thermogravimetric Analysis, Journal of Iron and Steel Research International, 25 (2018), 12, pp. 1223-1231
  8. Huo, L. M., et al., Oxidation and Reduction Kinetic of YBaCo4O7+δ and Substituted Oxygen Carriers, Journal of Thermal Analysis and Calorimetry, 134 (2018), 3, pp. 2213-2221
  9. Anjum, N., He, J. H., Laplace Transform: Making the Variational Iteration Method Easier, Applied Mathematics Letters, 92 (2019), June, pp. 134-138
  10. He, J. H., Some Asymptotic Methods for Strongly Nonlinear Equations, International Journal of Modern Physics B, 20 (2006), 10, pp. 1141-1199
  11. Ren, Z. F., et al., He's Multiple Scales Method for Nonlinear Vibrations, Journal of Low Frequency Noise, Vibration and Active Control, 38 (2019), 3-4, pp. 1708-1712
  12. Yu, D. N., et al., Homotopy Perturbation Method with an Auxiliary Parameter for Nonlinear Oscillators, Journal of Low Frequency Noise, Vibration and Active Control, 38 (2019), 3-4, pp. 1540-1554
  13. He, J. H., Ji, F. Y., Taylor Series Solution for Lane-Emden Equation, Journal of Mathematical Chemistry, 57 (2019), 8, pp. 1932-1934
  14. He, J. H., The Simplest Approach to Nonlinear Oscillators, Results in Physics, 15 (2019), 102546
  15. He, J. H., The Simpler, the Better: Analytical Methods for Nonlinear Oscillators and Fractional Oscillators, Journal of Low Frequency Noise, Vibration and Active Control, 38 (2019), 3-4, pp. 1252-1260

© 2020 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence