, Volume 71, Issue 7, pp 2338–2344 | Cite as

Use of Waste Polyethylene as a Source of Reducing Agent for Metal Oxide Reduction: A Case Study on NiO

  • M. Cumbul AltayEmail author
  • S. Eroglu
Urban Mining: Characterization and Recycling of Solid Wastes


This study introduces a novel way of using pyrolytic gas generated by the pyrolysis of waste high-density polyethylene (HDPE) for metal oxide reduction. A case study on NiO was carried out to reveal the feasibility of the method. Thermodynamic calculations were performed to guide and better understand the experiments. It was predicted that the pyrolytic gas mainly consisted of H2, CH4, and C6H6. HDPE pyrolysis and NiO reduction were simultaneously carried out during heating to the temperatures 550–900 K. NiO was reduced to Ni by the pyrolytic gas carried by Ar flow above 650 K. The conversion of HDPE to the pyrolytic gas increased as the temperature increased to 900 K. The extent of NiO reduction also increased with temperature due to enhanced HDPE pyrolysis. NiO reduction was completed at 900 K. It is feasible to use waste HDPE to reduce metal oxides such as NiO.



This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.


  1. 1.
    S.L. Wong, N. Ngadi, T.A.T. Abdullah, and I.M. Inuwa, Renew. Sustain. Energy Rev. 50, 1167 (2015).CrossRefGoogle Scholar
  2. 2.
    S. Dayana, A. Sharuddin, F. Abnisa, W.M. Ashri, W. Daud, and M.K. Aroua, Energy Convers. Manag. 115, 308 (2016).CrossRefGoogle Scholar
  3. 3.
    G. Elordi, G. Lopez, M. Olazar, R. Aguado, and J. Bilbao, J. Hazard. Mater. 144, 708 (2007).CrossRefGoogle Scholar
  4. 4.
    I. Ahmad, M.I. Khan, H. Khan, M. Ishaq, R. Tariq, K. Gul, and W. Ahmad, Int. J. Green Energy 12, 663 (2015).CrossRefGoogle Scholar
  5. 5.
    J.A. Consea, R. Font, A. Marcilla, and A.N. Garcia, Energy Fuels 8, 1238 (1994).CrossRefGoogle Scholar
  6. 6.
    D.Q. Zhu, Y. Cui, K. Vining, S. Hapugoda, J. Douglas, J. Pan, and G.L. Zheng, Int. J. Miner. Process. 106–109, 1 (2012).Google Scholar
  7. 7.
    T. Hidayat, M.A. Rhamdhani, E. Jak, and P.C. Hayes, Metall. Mater. Trans. B 40, 474 (2009).CrossRefGoogle Scholar
  8. 8.
    T. Utigard and R.A. Bergman, Metall. Trans. B 24, 271 (1993).CrossRefGoogle Scholar
  9. 9.
    M.C. Altay and S. Eroglu, Int. J. Miner. Process. 149, 50 (2016).CrossRefGoogle Scholar
  10. 10.
    M.C. Altay and S. Eroglu, J. Hazard. Mater. 367, 77 (2019).CrossRefGoogle Scholar
  11. 11.
    T.M. Besmann, Report no: ORNL/TM-5775, Oak Ridge National Laboratory, Tennessee, April 1977.Google Scholar
  12. 12.
    G. Eriksson, Chem. Scr. 8, 100 (1975).Google Scholar
  13. 13.
    I. Barin 3rd, eds., Thermochemical Data of Pure Substances (Weinheim: VCH, 2008).Google Scholar
  14. 14.
    M.W. Chase Jr., J. Phys. Chem. Ref. Data 9, 1 (1998).Google Scholar
  15. 15.
    C.L. Beyler and M.M. Hirschler, Thermal decomposition of polymers.SFPE Handbook of Fire Protection Engineering, Vol. 2, ed. P.J. DiNenno (Massachusetts: National Fire Protection Association, 2002), p. 1.Google Scholar
  16. 16.
    N.A. Sezgi, W.S. Cha, J.M. Smith, and B.J. McCoy, Ind. Eng. Chem. Res. 37, 2582 (1998).CrossRefGoogle Scholar
  17. 17.
    J. Zeaiter, Fuel 133, 276 (2014).CrossRefGoogle Scholar
  18. 18.
    S. Kumar and R.K. Singh, Braz. J. Chem. Eng. 28, 659 (2011).CrossRefGoogle Scholar
  19. 19.
    S.-H. Jung, M.-H. Cho, B.-S. Kang, and J.-S. Kim, Fuel Process. Technol. 91, 277 (2010).CrossRefGoogle Scholar
  20. 20.
    A. Marcilla, J.C. García-Quesada, S. Sánchez, and R. Ruiz, J. Anal. Appl. Pyrolysis 74, 387 (2005).CrossRefGoogle Scholar
  21. 21.
    S. Cetinkaya and S. Eroglu, Int. J. Miner. Process. 152, 46 (2016).CrossRefGoogle Scholar
  22. 22.
    J.A. Onwudili, N. Insura, and P.T. Williams, J. Anal. Appl. Pyrolysis 86, 293 (2009).CrossRefGoogle Scholar
  23. 23.
    P.T. Williams and E.A. Williams, Energy Fuels 13, 188 (1999).CrossRefGoogle Scholar

Copyright information

© The Minerals, Metals & Materials Society 2019

Authors and Affiliations

  1. 1.Department of Metallurgical and Materials Engineering, Engineering FacultyIstanbul University – CerrahpasaAvcilarTurkey

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