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

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

Energy, 2025, vol. 318, issue C

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 %.

Keywords: Carbon chain extension; Jet-fuels; Hydrophobicity; ZSM-5 zeolite; Biomass-derived alcohols; Dehydration-oligomerization (search for similar items in EconPapers)
Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:318:y:2025:i:c:s0360544225005080

DOI: 10.1016/j.energy.2025.134866

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