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Abstract <p>This study investigates the effects of dealumination time on the textural, structural, and acidic properties of halloysite. Treatment of halloysite with a 1 M sulfuric acid solution for 12 h increased the nanotube lumen diameter (to 24.7 nm), the specific surface area (to 154 m<sup>2</sup>/g), and the acidity (to 0.312 mmol/g). A series of Ru-based catalysts were synthesized using both pristine and dealuminated halloysites via microwave-assisted incipient wetness impregnation. The catalyst synthesized from dealuminated halloysite exhibited higher specific activity (TOF = 337 h<sup>–1</sup>), more than twofold higher cyclohexane selectivity, and a higher degree of deoxygenation (49%) compared to its pristine-support counterpart.</p>

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Dealumination of Halloysite Nanotubes as a Method for Enhancing Support Acidity in Ru-Based Catalysts for Guaiacol Hydrodeoxygenation

  • 期刊论文

  • 发表日期：

    2026年7月16日

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  • Gleb O. Zasypalov,
  • Vladimir A. Klimovsky,
  • Egor S. Abramov,
  • Ekaterina M. Smirnova,
  • Lubov D. Zatsepina,
  • Kirill P. Glotov,
  • Valentin D. Stytsenko,
  • Aleksandr P. Glotov

摘要

Abstract

This study investigates the effects of dealumination time on the textural, structural, and acidic properties of halloysite. Treatment of halloysite with a 1 M sulfuric acid solution for 12 h increased the nanotube lumen diameter (to 24.7 nm), the specific surface area (to 154 m2/g), and the acidity (to 0.312 mmol/g). A series of Ru-based catalysts were synthesized using both pristine and dealuminated halloysites via microwave-assisted incipient wetness impregnation. The catalyst synthesized from dealuminated halloysite exhibited higher specific activity (TOF = 337 h–1), more than twofold higher cyclohexane selectivity, and a higher degree of deoxygenation (49%) compared to its pristine-support counterpart.