A thermo-kinetic study on co-pyrolysis of oil shale and polyethylene terephthalate using TGA/FT-IR

ÖZSİN G., Kilic M., Apaydin-Varol E., PÜTÜN A. E., Putun E.

KOREAN JOURNAL OF CHEMICAL ENGINEERING, cilt.37, sa.11, ss.1888-1898, 2020 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 37 Sayı: 11
  • Basım Tarihi: 2020
  • Doi Numarası: 10.1007/s11814-020-0614-2
  • Dergi Adı: KOREAN JOURNAL OF CHEMICAL ENGINEERING
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Chemical Abstracts Core
  • Sayfa Sayıları: ss.1888-1898
  • Anahtar Kelimeler: Pyrolysis, Kinetics, PET, Oil Shale, Synergetic Effect, TGA, FT-IR, LOW-DENSITY POLYETHYLENE, FIXED-BED, SEWAGE-SLUDGE, BIOMASS, DEGRADATION, MIXTURES, THERMOGRAVIMETRY, GASIFICATION, POLYSTYRENE, COMBUSTION
  • Anadolu Üniversitesi Adresli: Evet

Özet

This study explored the effects of polyethylene terephthalate (PET) blending during the pyrolysis of oil shale (OS). Dynamic pyrolysis and co-pyrolysis tests at heating rates in the range from 5 to 40 degrees C/min were carried out using a thermogravimetric analyzer (TGA) coupled to a Fourier transform infrared spectrometer (FT-IR) to determine the kinetic parameters of the process and for online detection of evolved gasses. Pyrolytic decomposition of OS included a multi-stage decomposition process, while PET decomposed only in a single step. The kinetics of pyrolysis and co-pyrolysis was determined via model-free iso-conversional methods, namely Friedman, FWO, Starink, Vyazovkin, in a conversion degree range of 0.1-0.9. The kinetic models were validated with the obtained data to describe pyrolytic and co-pyrolytic degradation mechanisms, and the regression coefficients were between 0.9823 and 0.9999. The results showed that the activation energy of co-pyrolysis was evidently lower than that of PET or OS pyrolysis. This led to the conclusion that co-pyrolysis could be a potential method for obtaining shale oil due to the synergy between OS and PET.