Journal of Material Cycles and Waste Management

, Volume 20, Issue 2, pp 1273–1285 | Cite as

Pyrolytic conversion of used tyres to liquid fuel: characterization and effect of operating conditions

  • Julius I. Osayi
  • Sunny Iyuke
  • Michael O. Daramola
  • Peter Osifo
  • Izak J. Van Der Walt
  • Samuel E. Ogbeide


Thermochemical conversion (pyrolysis) of used tyres as a method of solid waste treatment and its beneficiation to value-added products (such as liquid fuel) was investigated in this study. A chemical vapour deposition reactor was used for the tyre pyrolysis, and effects of operating variables on the process were studied. Operating variables were the tyre feed mass and size, heating rate, and temperature. The operating parameters were also optimized to yield an optimum yield of 34.03 wt% for the liquid product (pyrolytic oil) at operating temperature of 600 °C at a heating rate of 15 °C/min for a feed particle size of 6 mm. A detailed characterization of the pyrolytic oil was performed using Fourier transform infrared (FTIR), nuclear magnetic resonance (NMR), and gas chromatography–mass spectrometry (GC–MS). Results obtained reveal the pyrolytic oil to be a complex mixture, mainly of aliphatic and aromatic compounds, which can serve as a feedstock in industrial application. In addition, the physicochemical properties of the oil were comparable to that of the conventional fossil fuel oil, implying the possibility of the used tyres as an alternative source of liquid fuel.


Fossil fuel Pyrolysis Pyrolytic oil Used tyres 



Financial support from the National Research Foundation (NRF) under the South Africa NRF Focus Area and student bursaries made available by both the University of the Witwatersrand and Vaal University of Technology is hereby acknowledged.


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Copyright information

© Springer Japan KK, part of Springer Nature 2017

Authors and Affiliations

  • Julius I. Osayi
    • 1
  • Sunny Iyuke
    • 2
  • Michael O. Daramola
    • 2
  • Peter Osifo
    • 1
  • Izak J. Van Der Walt
    • 3
  • Samuel E. Ogbeide
    • 4
  1. 1.Department of Chemical EngineeringVaal University of TechnologyVanderbijlparkSouth Africa
  2. 2.School of Chemical and Metallurgical EngineeringUniversity of the WitwatersrandJohannesburgSouth Africa
  3. 3.Plasma Technology SectionSouth Africa Nuclear Energy Corporation (NECSA)PretoriaSouth Africa
  4. 4.Department of Chemical EngineeringUniversity of BeninBenin CityNigeria

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