International Scientific Journal


Pyrolysis as a technique of chemical recycling of plastic materials is causing an increasing level of interest as an environmentally and economically acceptable option for the processing of waste materials. Studies of these processes are carried out under different experimental conditions, in different types of reactors and with different raw materials, which makes the comparison of different processes and the direct application of process parameters quite complex. This paper presents the results of investigation of the influence of temperature in the range of 450°C to 525°C, on the yield of the process of pyrolysis of waste plastics mixture, composed of 45% polypropylene, 35% low density polyethylene and 25% high density polyethylene. Also, this paper presents results of the investigation of the effect of the reaction, atintervals of 30-90 [min], on the yield of pyrolysis of the mentioned waste plastics mixture. Research was conducted in a fixed bed pilot reactor, which was developed for this purpose. The results of the research show that at a temperature of 500°C, complete conversion of raw materials was achieved, for a period of 45 [min], with a maximum yield of the pyrolysis oil of 32.80%, yield of the gaseous products of 65.75% and the solid remains of 1.46%. Afurther increase of temperature increases the yield of gaseous products, at the expense of reducing the yield of pyrolysis oil. Obtained pyrolysis oil has a high calorific value of 45.96 [MJ/kg], and in this regard has potential applications as an alternative fuel.
PAPER REVISED: 2015-10-29
PAPER ACCEPTED: 2015-10-29
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2016, VOLUME 20, ISSUE Issue 2, PAGES [731 - 741]
  1. *** EEA - European Environment Agency: Material resources and waste - update 2012, ЕЕА, Denmark, Copenhagen, 2012, pp. 23-24.
  2. *** PlasticsEurope-Associatioan of Plastics Manufacturers: Plastics-the Facts 2012, An analysis of European plastics production, demand and waste data for 2011.
  3. ***Eurostat: Packaging waste statistic, (Online).
  4. Kopranović, S, Životnasredina, in: Statistički godišnjak Republike Srpske 2012. (Ed V. Savić) Republički zavod za statistiku RepublikeSrpske, Banja Luka, 2013, pp.221-230.
  5. *** RZS - Republički zavod za statistiku, Proizvedeni, prikupljeni i odloženi otpad. Statistika životne sredine godišnje sopštenje, Broj/No. 218/14.
  6. Kopranović, S., Životna sredina, in: Statistički godišnjak Republike Srpske 2012. (Ed V. Savić), Republički zavod za statistiku Republike Srpske, Banja Luka (2012), pp.210-221.
  7. *** EC-European Commission: Waste Recycling Pilot Project in Bosnia and Herzegovina, Waste Recycling Handbook. EC, 2004
  8. Aguado, J., et al., European Trends In The Feedstock Recycling Of Plastic Wastes. Global NEST Journal, 9 (2007), 1, pp. 12-19
  9. Williams, P.T., Waste Treatment and Disposal, John Wiley & Sons Ltd, Chichester, 2005.
  10. Elordi, G., et al., Product distribution modelling in the thermal pyrolysis of high density polyethylene. Journal of Hazardous Materials, 144 (2007), pp. 708-714.
  11. Al-Salem, S.M., Lettieri, P., Kinetics of Polyethylene Terephthalate (PET) and Polystyrene (PS) Dynamic Pyrolysis, World Academy of Science, Engineering and Technology, 66 2010, pp. 1267-1275
  12. Costa P.A., et al., Kinetic Evaluation of the Pyrolysis of Polyethylene Waste. Energy & Fuels. 21 (2007),5, pp. 2489-2498
  13. . Williams, P.T., Slaney, E., Analysis of products from the pyrolysis and liquefaction of single plastics and waste plastic mixtures. Resources, Conservation and Recycling, 51 (2007), pp. 754-769
  14. Ding, F., et al., Kinetic study of low-temperature conversion of plastic mixtures to value added products. Journal of Analytical and Applied Pyrolysis, 94 (2012), pp. 83-90
  15. Adrados, A., et al., Pyrolysis of plastic packaging waste: A comparison of plastic residuals from material recovery facilities with simulated plastic waste, Waste Management, 32 (2012), 5, pp. 826-832
  16. López, A et al., Influence of time and temperature on pyrolysis of plastic wastes in a semi-batch reactor, Chemical Engineering Journal, 173 (2011), pp. 62-71
  17. Jung, C.G., Fontana, A., Production of Gaseous and Liquid Fuels by Pyrolysis and Gasification of Plastics: Technological Approach, in: Feedstock Recycling and Pyrolysis of Waste Plastics: Converting Waste Plastics into Diesel and Other Fuels. (Eds J. Scheirs, and W. Kaminsky), John Wiley & Sons Ltd., Chichester, 2006, pp. 251-283
  18. Encinar, et al., Pyrolysis of synthetic polymers and plastic wastes, Kinetic study. Fuel Processing Technology, 89 (2008), pp. 678- 686
  19. Demirbas, A., Pyrolysis of municipal plastic waste for recovery of gasoline-range hydrocarbons, Journal Of Analytical And Applied Pyrolysis, 72 (2004) pp.97-102
  20. . Kaminsky, W., Zorriqueta, I-J.N., Catalytical and thermal pyrolysis of polyolefins. Journal of Analytical and Applied Pyrolysis, 79 (2007) 368-374
  21. Kaminsky, W., The Hamburg Fluidized-bed Pyrolysis Process to Recycle Polymer Wastes and Tires. in: Feedstock Recycling and Pyrolysis of Waste Plastics: Converting Waste Plastics into Diesel and Other Fuels. (Eds J. Scheirs, and W. Kaminsky), John Wiley & Sons Ltd., Chichester, 2006, pp. 475-490
  22. Kaminsky, W., Recycling of polymers by pyrolysis, Journal de Phisique IV, 3(1993),pp.1543-1552.
  23. Elordi, G. et al., Product distribution modelling in the thermal pyrolysis of high density polyethylene, Journal of Hazardous Materials, 144( 2007) ,pp.708-714.
  24. Kiran, N., E. Ekinci, C.E. Snape: Recyling of plastic wastes via pyrolysis. Resources, Conservation and Recycling, 29 (2000), pp. 273-283
  25. . Lee, K.-H., Pyrolysis of municipal plastic wastes separated by difference of specific gravity, Journal of Analytical and Applied Pyrolysis, 79 (2007), pp. 362-367
  26. . Sørum, L., et al., Pyrolysis characteristics and kinetics of municipal solid wastes. Fuel, 80 (2001), 9, pp.1217-1227
  27. Sharypov, V.I., et al., Co-pyrolysis of wood biomass and synthetic polymers mixtures, Part III: Characterisation of heavy products, Journal of Analytical and Applied Pyrolysis, 67 (2003), pp. 325-340
  28. Zhou, L., et al., Thermogravimetric characteristics and kinetic of plastic and biomass blends co-pyrolysis, Fuel Processing Technology, 87 (2006),11, pp. 963-969
  29. Papuga, S., et al., Preliminary Research of Waste Biomass and Plastic Pyrolysis Process. Contemporary Materials, 4 (2013), 1 , pp. 76-83
  30. Achilias, D.S., Ε. Antonkou, C. Roupakias, P. Megalokonomos, A. Lappas: Recycling Techniques of Polyolefins from Plastic Wastes, Global NEST Journal, 10 (2008), 1, pp. 114-122
  31. Panda, A.K., Studies on process optimization for production of liquid fuels from waste plastics, Ph.D. thesis, National Institute of Technology, Rourkela, India, 2011
  32. Khaghanikavkani, E., Farid, M.M., Thermal Pyrolysis of Polyethylene: Kinetic Study, Energy Science and Technology, 2 (2011), 1, pp. 1-10
  33. Lee, K-H.: Pyrolysis of Waste Polystyrene and High-Density Polyethylene, in: Material Recycling - Trends and Perspectives (Ed. D. Achilias,) InTech Europe, Rijeka, 2012, pp.175-192
  34. Miskolczi, N.,et al., Thermal and thermo-catalytic degradation of high-density polyethylene waste, Journal of Analytical and Applied Pyrolysis, 72 (2004), 2, pp. 235-242
  35. Lee, K.-H., et al., Effect of heating rate on pyrolysis of low-grade pyrolytic oil, Korean J. Chem. Eng., 28 (2011), 6, pp. 1468-1473
  36. Mani, M., et al., Performance, emission and combustion characteristics of a DI diesel engine using waste plastic oil, Appl. Therm. Eng., 29 (2009), pp. 2738-2744
  37. Li, A.M., et al., Pyrolysis of solid waste in a rotary kiln: influence of final pyrolysis temperature on the pyrolysis products, J. Anal. Appl. Pyrolysis, 50 (1999), pp. 149-162
  38. Ji, L., Hervier, A., Sablier, M., Study on the pyrolysis of polyethylene in the presence of iron and copper chlorides, Chemosphere, 65 (2006), pp. 1120-1130

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, 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