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Investigation of oil-shale pyrolysis processing conditions using thermogravimetric analysis

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  • Williams, Paul T.
  • Ahmad, Nasir

Abstract

Four oil-shale samples from two regions of Pakistan have been pyrolysed in a thermogravimetric analyser (TGA) in relation to heating rate and temperature using non-isothermal and isothermal analysis respectively. The heating rates investigated in the TGA were 5-40 K min-1 to a final temperature of 950°C. The main region of weight loss corresponding to hydrocarbon oil and gas release was between 200 and 620°C, and at higher temperatures, significant weight loss was attributed to carbonate decomposition. It was found that for the oil-shale samples analysed in the TGA, increasing the heating rate shifted the reaction to higher temperatures. The final temperature of the pyrolysis was investigated using the isothermal TGA. The temperature range studied was from 350 to 485°C. The data were analysed to determine the kinetic parameters of activation energy and frequency factor using two methods, the Arrhenius and Coats-Redfern analyses. The order of reaction was determined as unity. There was no clear relationship between activation energy and heating rate. The Coats-Redfern method of analysis gave consistently lower values of activation energy compared with the Arrhenius method. Isothermal analysis gave similar results to those obtained using the non-isothermal analysis.

Suggested Citation

  • Williams, Paul T. & Ahmad, Nasir, 2000. "Investigation of oil-shale pyrolysis processing conditions using thermogravimetric analysis," Applied Energy, Elsevier, vol. 66(2), pages 113-133, June.
    • Handle: RePEc:eee:appene:v:66:y:2000:i:2:p:113-133
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    Cited by:

    1. Niu, Shengli & Han, Kuihua & Lu, Chunmei & Sun, Rongyue, 2010. "Thermogravimetric analysis of the relationship among calcium magnesium acetate, calcium acetate and magnesium acetate," Applied Energy, Elsevier, vol. 87(7), pages 2237-2242, July.
    2. Moine, Ely cheikh & Groune, Khalihena & El Hamidi, Adnane & Khachani, Mariam & Halim, Mohammed & Arsalane, Said, 2016. "Multistep process kinetics of the non-isothermal pyrolysis of Moroccan Rif oil shale," Energy, Elsevier, vol. 115(P1), pages 931-941.
    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. Saif, Tarik & Lin, Qingyang & Butcher, Alan R. & Bijeljic, Branko & Blunt, Martin J., 2017. "Multi-scale multi-dimensional microstructure imaging of oil shale pyrolysis using X-ray micro-tomography, automated ultra-high resolution SEM, MAPS Mineralogy and FIB-SEM," Applied Energy, Elsevier, vol. 202(C), pages 628-647.
    5. Niu, Mengting & Wang, Sha & Han, Xiangxin & Jiang, Xiumin, 2013. "Yield and characteristics of shale oil from the retorting of oil shale and fine oil-shale ash mixtures," Applied Energy, Elsevier, vol. 111(C), pages 234-239.
    6. He, Lu & Ma, Yue & Yue, Changtao & Li, Shuyuan & Tang, Xun, 2022. "The heating performance and kinetic behaviour of oil shale during microwave pyrolysis," Energy, Elsevier, vol. 244(PB).
    7. Lei, Jian & Pan, Baozhi & Guo, Yuhang & Fan, YuFei & Xue, Linfu & Deng, Sunhua & Zhang, Lihua & Ruhan, A., 2021. "A comprehensive analysis of the pyrolysis effects on oil shale pore structures at multiscale using different measurement methods," Energy, Elsevier, vol. 227(C).
    8. Wang, Qing & Zhao, Weizhen & Liu, Hongpeng & Jia, Chunxia & Li, Shaohua, 2011. "Interactions and kinetic analysis of oil shale semi-coke with cornstalk during co-combustion," Applied Energy, Elsevier, vol. 88(6), pages 2080-2087, June.
    9. Kang, Zhiqin & Zhao, Yangsheng & Yang, Dong, 2020. "Review of oil shale in-situ conversion technology," Applied Energy, Elsevier, vol. 269(C).

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    Keywords

    Kinetics Oil shale Pyrolysis TGA;

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