International Scientific Journal


This paper presents the results of experimental studies of thermokinetic characteristics of pyrolysis and oxidation of pine needles, taking into account the influence of particle size and density of forest fuel in pelleted samples. The sample densities range within 206-955 kg/m3 (i.e. from typical sample densities to average ones for pressed pelleted samples), and the component particle sizes amount to 60-140 μm. The range of studied temperatures is 20-1000°С. The particle size and density of the material are found to be important parameters that significantly affect the kinetics of pyrolysis. According to the results of measurements, the activation energy of needles pyrolysis is within the range of 22.8-113.8 kJ/mol, and that of oxidation corresponds to 134.7-211 kJ/mol. Three intervals with significantly different values of activation energy and pre-exponential factor are distinguished in the studied temperature range. Approximation expressions are formulated for the activation energies of pyrolysis and oxidation as functions of forest fuel particle sizes, sample density and temperature.
PAPER REVISED: 2021-02-22
PAPER ACCEPTED: 2021-03-04
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THERMAL SCIENCE YEAR 2021, VOLUME 25, ISSUE Issue 6, PAGES [4695 - 4705]
  1. Zhdanova, A.O., et al., Thermal conditions for stopping pyrolysis of forest combustible material and applications to firefighting, Thermal Science, 21 (2017), pp. 2565-2577.
  2. Shlegel, N., et al., Suppression of forest fuel thermal decomposition under the influence of liquid aerosol and water droplets with additives, MATEC Web of Conference, 141 (2017), pp. 01017
  3. Cancellieri, D., et al., New experimental diagnostics in combustion of forest fuels: microscale appreciation for a macroscale approach, Natural Hazards and Earth System Sciences, 18 (2018), pp. 1957-1968
  4. Bartoli, P., et al., Determination of the main parameters influencing forest fuel combustion dynamics, Fire Safety Journal, 46 (2011), pp. 27-33
  5. Fuentes, A., Consalvi, J.L., Experimental study of the burning rate of small-scale forest fuel layers, International Journal of Thermal Sciences, 74 (2013), pp. 119-125
  6. Korobeinichev, O.P., et al., Combustion Chemistry and Decomposition Kinetics of Forest Fuels, Procedia Engineering, 62 (2013), pp. 182-193
  7. Font, R., et al., Kinetics of pyrolysis and combustion of pine needles and cones, Journal of Analytical and Applied Pyrolysis, 85 (2009), pp. 276-286
  8. Xi, Y., et al., Numerical simulation on temperature in wood crib fires, Thermal Science (2020), pp. 288-288.
  9. Benkorichi, S., et al., Investigation of thermal degradation of pine needles using multi-step reaction mechanisms, Fire Safety Journal, 91 (2017), pp. 811-819
  10. Fateh, T., et al., Multi-scale experimental investigations of the thermal degradation of pine needles, Fire and Materials, 41 (2017), pp. 654-674
  11. Leoni, E., et al., Thermal Degradation of Pinus Pinaster Needles by DSC, Part 2: Kinetics of Exothermic Phenomena, Journal of Fire Sciences, 21 (2003), pp. 117-130
  12. Chouchene, A., et al., Thermal degradation of olive solid waste: Influence of particle size and oxygen concentration, Resources, Conservation and Recycling, 54 (2010), pp. 271-277
  13. Niu, H., et al., Effect of Particle Size on Pyrolysis Kinetics of Forest Fuels in Nitrogen, Fire Safety Science, 11 (2014), pp. 1393-1405
  14. Zhdanova, A.O., et al., Thermophysical and Thermokinetic Characteristics of Forest Combustible Materials, Journal of Engineering Physics and Thermophysics, (2019), pp. 1-9
  15. Núñez-Regueira, L., et al., Design of forest biomass energetic maps as a tool to fight forest wildfires, Thermochimica Acta, 328 (1999), pp. 111-120.
  16. Dimitrakopoulos, A.P., A statistical classification of Mediterranean species based on their flammability components, International Journal of Wildland Fire, 10 (2001), pp. 113-118.
  17. Vyazovkin, S., Thermogravimetric Analysis, in: Characterization of Materials, John Wiley & Sons, Hoboken, USA, (2012), pp. 1-12
  18. Kinata, S.E., et al., Influence of impregnation method on metal retention of CCB-treated wood in slow pyrolysis process, Journal of Hazardous Materials, 233-234 (2012), pp. 172-176
  19. Wagner, M., Differential Thermal Analysis, in: Thermal Analysis in Practice, Carl Hanser Verlag GmbH & Co. KG, München , Germany (2017), pp. 158-161
  20. Niu, B., et al., Application of pyrolysis to recycling organics from waste tantalum capacitors, Journal of Hazardous Materials, 335 (2017), pp. 39-46
  21. Huang, C., et al., Suppression of wood dust explosion by ultrafine magnesium hydroxide, Journal of Hazardous Materials, 378 (2019), pp. 120723
  22. Amini, E., et al., Pyrolysis kinetics of live and dead wildland vegetation from the Southern United States, Journal of Analytical and Applied Pyrolysis,142 (2019), pp. 104613
  23. Tao, J.-J., et al., Reality in the Kinetic Modelling of Pyrolysis of Plant Fuels, Energy Procedia, 107 (2017), pp. 85-93
  24. Onsree, T., et al., Pyrolysis behavior and kinetics of corn residue pellets and eucalyptus wood chips in a macro thermogravimetric analyzer, Case Studies in Thermal Engineering, 12 (2018), pp. 546-556
  25. Maryandyshev, P.A., et al., Experimental research of the process of thermal processing and biofuel ignition, International journal of experimental education, 11 (2013), pp. 71-76
  26. Jaroenkhasemmeesuk, C., et al., Thermal degradation kinetics of sawdust under intermediate heating rates, Applied Thermal Engineering, 103 (2016), pp. 170-176
  27. Leroy, V., et al., Kinetic study of forest fuels by TGA: Model-free kinetic approach for the prediction of phenomena, Thermochimica Acta, 497 (2010), pp. 1-6
  28. Blasi, C. Di., Modeling chemical and physical processes of wood and biomass pyrolysis, Progress in Energy and Combustion Science, 34 (2008), pp. 47-90
  29. Babu, B.V., et al., Heat transfer and kinetics in the pyrolysis of shrinking biomass particle, Chemical Engineering Science, 59 (2004), pp. 1999-2012
  30. Woo Park, J., et al., A kinetic analysis of thermal degradation of polymers using a dynamic method, Polymer Degradation and Stability, 67 (2000), pp. 535-540
  31. Filkov, A., et al., Drying Kinetics of the Selected Grass Fuels under Isothermal Condition, Advanced Materials Research, 1085 (2015), pp. 345-350
  32. Sis, H., Evaluation of combustion characteristics of different size elbistan lignite by using TG/DTG and DTA, Journal of Thermal Analysis and Calorimetry, 88 (2007), pp. 863-870
  33. Singh, S., et al., Intrinsic kinetics, thermodynamic parameters and reaction mechanism of non-isothermal degradation of torrefied Acacia nilotica using isoconversional methods, Fuel, 259 (2020), pp. 116263
  34. Atreya, A., et al., The effect of size, shape and pyrolysis conditions on the thermal decomposition of wood particles and firebrands, International Journal of Heat and Mass Transfer, 107 (2017), pp. 319-328

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