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Abstract <p>A series of micro–mesoporous ZSM-5 zeolites with SiO<sub>2</sub>/Al<sub>2</sub>O<sub>3</sub> molar ratios ranging from 40 to 280 were synthesized hydrothermally using natural aluminosilicate halloysite nanotubes (HNTs) as a precursor for silica and alumina and as a co-template for the generation of mesopores. The physicochemical properties of the synthesized materials were characterized by energy dispersive X-ray fluorescence, X-ray diffraction, scanning and transmission electron microscopy, low-temperature nitrogen adsorption–desorption, and temperature-programmed ammonia desorption. Using the zeolite sample with an optimal combination of physicochemical properties, a Pt catalyst was prepared and tested in hydroisodewaxing of a hydrotreated diesel fuel (DF) feedstock. The catalyst supported on the HNT-based zeolite exhibited high performance in the isodewaxing of middle distillates, thus producing arctic diesel fuels at lower temperatures than those recorded for the catalyst supported on a commercial zeolite with a similar SiO<sub>2</sub>/Al<sub>2</sub>O<sub>3</sub> ratio.</p>

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Synthesis and Investigation of Catalysts Supported on Micro–Mesoporous MFI Zeolites in Hydroisodewaxing of Diesel Fuels

  • 期刊论文

  • 发表日期：

    2025年4月1日

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  • M. I. Rubtsova,
  • L. D. Zatsepina,
  • Y. Aljajan,
  • E. M. Smirnova,
  • A. M. Kozlov,
  • N. A. Vinogradov,
  • A. I. Guseva,
  • A. A. Pimerzin,
  • A. P. Glotov

摘要

Abstract

A series of micro–mesoporous ZSM-5 zeolites with SiO2/Al2O3 molar ratios ranging from 40 to 280 were synthesized hydrothermally using natural aluminosilicate halloysite nanotubes (HNTs) as a precursor for silica and alumina and as a co-template for the generation of mesopores. The physicochemical properties of the synthesized materials were characterized by energy dispersive X-ray fluorescence, X-ray diffraction, scanning and transmission electron microscopy, low-temperature nitrogen adsorption–desorption, and temperature-programmed ammonia desorption. Using the zeolite sample with an optimal combination of physicochemical properties, a Pt catalyst was prepared and tested in hydroisodewaxing of a hydrotreated diesel fuel (DF) feedstock. The catalyst supported on the HNT-based zeolite exhibited high performance in the isodewaxing of middle distillates, thus producing arctic diesel fuels at lower temperatures than those recorded for the catalyst supported on a commercial zeolite with a similar SiO2/Al2O3 ratio.