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Pyrolysis Kinetic Parameters of Omari Oil Shale Using Thermogravimetric Analysis

Author

Listed:
  • Ziad Abu El-Rub

    (Pharmaceutical and Chemical Engineering Department, German Jordanian University, Amman 11180, Jordan)

  • Joanna Kujawa

    (Faculty of Chemistry, Nicolaus Copernicus University in Toruń, 7 Gagarina Street, 87-100 Toruń, Poland)

  • Samer Al-Gharabli

    (Pharmaceutical and Chemical Engineering Department, German Jordanian University, Amman 11180, Jordan)

Abstract

Oil shale is one of the alternative energies and fuel solutions in Jordan because of the scarcity of conventional sources, such as petroleum, coal, and gas. Oil from oil shale reservoirs can be produced commercially by pyrolysis technology. To optimize the process, mechanisms and rates of reactions need to be investigated. Omari oil shale formation in Jordan was selected as a case study, for which no kinetic models are available in the literature. Oil shale was analyzed using the Fischer assay method, proximate analysis (moisture, volatile, and ash), gross calorific value, elemental analysis (CHNS), and X-ray fluorescence (XRF) measurements. Non-isothermal thermogravimetric analysis was applied to study the kinetic parameters (activation energy and frequency factor) at four selected heating rates (5, 10, 15, and 20 °C/min). When oil shale was heated from room temperature to 1100 °C, the weight loss profile exhibited three different zones: drying (devolatilization), pyrolysis, and mineral decomposition. For each zone, the kinetic parameters were calculated using three selected methods: integral, temperature integral approximation, and direct Arrhenius plot. Furthermore, the activation energy in the pyrolysis zone was 112–116 kJ/mol, while the frequency factor was 2.0 × 10 7 − 1.5 × 10 9 min −1 . Moreover, the heating rate has a directly proportional relationship with the rate constant at each zone. The three different methods gave comparable results for the kinetic parameters with a higher coefficient of determination (R 2 ) for the integral and temperature integral approximation compared with the direct Arrhenius plot. The determined kinetic parameters for Omari formation can be employed in developing pyrolysis reactor models.

Suggested Citation

  • Ziad Abu El-Rub & Joanna Kujawa & Samer Al-Gharabli, 2020. "Pyrolysis Kinetic Parameters of Omari Oil Shale Using Thermogravimetric Analysis," Energies, MDPI, vol. 13(16), pages 1-13, August.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:16:p:4060-:d:395071
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    References listed on IDEAS

    as
    1. Al-Ayed, Omar S. & Suliman, Mohd R. & Rahman, Nafi Abdel, 2010. "Kinetic modeling of liquid generation from oil shale in fixed bed retort," Applied Energy, Elsevier, vol. 87(7), pages 2273-2277, July.
    2. Ziad Abu El-Rub & Joanna Kujawa & Esra’a Albarahmieh & Nafisah Al-Rifai & Fathieh Qaimari & Samer Al-Gharabli, 2019. "High Throughput Screening and Characterization Methods of Jordanian Oil Shale as a Case Study," Energies, MDPI, vol. 12(16), pages 1-16, August.
    3. Pan, Luwei & Dai, Fangqin & Li, Guangqiang & Liu, Shuang, 2015. "A TGA/DTA-MS investigation to the influence of process conditions on the pyrolysis of Jimsar oil shale," Energy, Elsevier, vol. 86(C), pages 749-757.
    4. Jaber, J. O. & Probert, S. D., 1999. "Pyrolysis and gasification kinetics of Jordanian oil-shales," Applied Energy, Elsevier, vol. 63(4), pages 269-286, August.
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