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Enhancing carbon chain extension of higher alcohols to jet fuels by surface hydrophobicity modification of HZSM-5

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  • Liu, Zhonghai
  • Gong, Yuying
  • Jiang, Ting
  • Xiao, Chenglei
  • Pang, Yayun
  • Chen, Baozhu
  • Song, Jinliang
  • Wang, Tiejun

Abstract

Developing jet fuel through a one-step dehydration-oligomerization process using higher alcohols derived from bioethanol coupling is of paramount significance. This work aims to enhance zeolite hydrophobicity to facilitate carbon chain growth and improve the selectivity for C8-C16 hydrocarbons. The dehydration-oligomerization of butanol over octadecyltrichlorosilane-modified HZSM-5 zeolite (Z25-OTS) achieved a selectivity of 80.5 % for C8-C16 products, representing a 29.2 % increase over the parent Z25 zeolite. This improvement is attributed to its enhanced hydrophobicity, higher Brønsted/Lewis acidity, and increased adsorption of hydrocarbons. In practical mixed higher alcohol systems, the use of hydrophobic zeolites elevated the selectivity of C8-C16 components from 13.6 % to 57.5 %.

Suggested Citation

  • Liu, Zhonghai & Gong, Yuying & Jiang, Ting & Xiao, Chenglei & Pang, Yayun & Chen, Baozhu & Song, Jinliang & Wang, Tiejun, 2025. "Enhancing carbon chain extension of higher alcohols to jet fuels by surface hydrophobicity modification of HZSM-5," Energy, Elsevier, vol. 318(C).
    • Handle: RePEc:eee:energy:v:318:y:2025:i:c:s0360544225005080
    DOI: 10.1016/j.energy.2025.134866
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    References listed on IDEAS

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    1. Xie, Shaoqu & Li, Zhuoxi & Luo, Shaojuan & Zhang, Wanli, 2024. "Bioethanol to jet fuel: Current status, challenges, and perspectives," Renewable and Sustainable Energy Reviews, Elsevier, vol. 192(C).
    2. Juwen Gu & Wanbing Gong & Qian Zhang & Ran Long & Jun Ma & Xinyu Wang & Jiawei Li & Jiayi Li & Yujian Fan & Xinqi Zheng & Songbai Qiu & Tiejun Wang & Yujie Xiong, 2023. "Enabling direct-growth route for highly efficient ethanol upgrading to long-chain alcohols in aqueous phase," Nature Communications, Nature, vol. 14(1), pages 1-10, December.
    3. Díaz, Marta & Epelde, Eva & Tabernilla, Zuria & Ateka, Ainara & Aguayo, Andrés T. & Bilbao, Javier, 2020. "Operating conditions to maximize clean liquid fuels yield by oligomerization of 1-butene on HZSM-5 zeolite catalysts," Energy, Elsevier, vol. 207(C).
    4. Candelaria Bergero & Greer Gosnell & Dolf Gielen & Seungwoo Kang & Morgan Bazilian & Steven J. Davis, 2023. "Pathways to net-zero emissions from aviation," Nature Sustainability, Nature, vol. 6(4), pages 404-414, April.
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