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The enhancement on oil shale extraction of FeCl3 catalyst in subcritical water

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  • Kang, Shijie
  • Sun, Youhong
  • Qiao, Mingyang
  • Li, Shengli
  • Deng, Sunhua
  • Guo, Wei
  • Li, Jiasheng
  • He, Wentong

Abstract

The coupling effect of subcritical water and FeCl3 on the extraction of bulk Huadian oil shale was experimentally investigated. The results showed that, with the addition of FeCl3, the yield of shale oil in subcritical water extraction was enhanced by 58.5 % at 20 h and the time required for the maximum shale oil production was reduced by 43 %. The group compositions of shale oil and residual bitumen as well as the elemental analysis of residual kerogen revealed that FeCl3 could trigger the pyrolysis reaction networks of kerogen by promoting the cleavage of heteroatom bonds, and accelerate the decomposition of asphaltenes in residual bitumen. GC-MS analysis of n-alkanes in shale oil and residual bitumen showed that FeCl3 promoted the secondary cracking of saturated hydrocarbons in residual bitumen rather than in shale oil due to the adsorption of Fe3+ in shale matrix. The solid-state 13C NMR analysis of the residual kerogen indicated that the polycondensation of kerogen was inhibited and the ring-opening reaction of aromatic structure was promoted in the presence of FeCl3. In addition, the acidic FeCl3 solution induced the decomposition of carbonate minerals in oil shale matrix to provide additional mass transfer channels for the migration of bitumen products.

Suggested Citation

  • Kang, Shijie & Sun, Youhong & Qiao, Mingyang & Li, Shengli & Deng, Sunhua & Guo, Wei & Li, Jiasheng & He, Wentong, 2022. "The enhancement on oil shale extraction of FeCl3 catalyst in subcritical water," Energy, Elsevier, vol. 238(PA).
    • Handle: RePEc:eee:energy:v:238:y:2022:i:pa:s0360544221020119
    DOI: 10.1016/j.energy.2021.121763
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    References listed on IDEAS

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    Cited by:

    1. Cui, Da & Yin, Helin & Liu, Yupeng & Li, Ji & Pan, Shuo & Wang, Qing, 2022. "Effect of final pyrolysis temperature on the composition and structure of shale oil: Synergistic use of multiple analysis and testing methods," Energy, Elsevier, vol. 252(C).
    2. Rongsheng Zhao & Luquan Ren & Sunhua Deng & Youhong Sun & Zhiyong Chang, 2021. "Constrain on Oil Recovery Stage during Oil Shale Subcritical Water Extraction Process Based on Carbon Isotope Fractionation Character," Energies, MDPI, vol. 14(23), pages 1-12, November.
    3. Wang, Lei & Yang, Dong & Zhang, Yuxing & Li, Wenqing & Kang, Zhiqin & Zhao, Yangsheng, 2022. "Research on the reaction mechanism and modification distance of oil shale during high-temperature water vapor pyrolysis," Energy, Elsevier, vol. 261(PB).
    4. Zhang, Xu & Guo, Wei & Pan, Junfan & Zhu, Chaofan & Deng, Sunhua, 2024. "In-situ pyrolysis of oil shale in pressured semi-closed system: Insights into products characteristics and pyrolysis mechanism," Energy, Elsevier, vol. 286(C).
    5. Kang, Shijie & Zhang, Shijing & Wang, Zhendong & Li, Shengli & Zhao, Fangci & Yang, Jie & Zhou, Lingbo & Deng, Yang & Sun, Guidong & Yu, Hongdong, 2023. "Highly efficient catalytic pyrolysis of oil shale by CaCl2 in subcritical water," Energy, Elsevier, vol. 274(C).

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