Kinetics of pyrolysis and combustion of oil shale sample from thermogravimetric data

Shabbar Syed, Rana Qudaih, Ilham Talab, Isam Janajreh

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Thermogravimetric (TG) data of oil shale obtained at MI (Waste to Energy laboratory) were studied to evaluate the kinetic parameters for El-Lujjun oil shale samples. Different heating rates were employed simulating pyrolysis reaction using Nitrogen as purging gas up to ∼800 °C. The extent of char combustion was found out by relating TG data for pyrolysis and combustion with the ultimate analysis. Due to distinct behavior of oil shale during pyrolysis, TG curves were divided into three separate events: moisture release; devolatization; and evolution of fixed carbon/char, where for each event, kinetic parameters, based on Arrhenius theory, were calculated. Three methods were used and compared: integral method; direct Arrhenius plot method; and temperature integral approximation method. Results showed that integral method is closer to the experiment, while no relationship was observed between activation energy and the heating rate.

Original languageBritish English
Pages (from-to)1631-1637
Number of pages7
Issue number4
StatePublished - Apr 2011


  • Gasification
  • Kinetics parameters
  • Oil shale
  • Pyrolysis
  • Thermogravimetric (TG analyses)


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