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<p>The search of appropriate methods for the synthesis of micro-mesoporous zeolites is of a high importance for the development of the catalysts with improved characteristics. This study investigates the influence of the base and acidic post-synthetic treatment on the physicochemical properties of ZSM-12 zeolite. A comprehensive suite of characterization techniques was employed to analyze the developed materials, including X–ray diffraction (XRD), X–ray fluorescence (XRF), low-temperature nitrogen adsorption-desorption, temperature-programmed desorption of ammonia (NH<sub>3</sub>–TPD), infrared spectroscopy (IR), scanning electron microscopy (SEM), elemental analysis, transmission electron microscopy (TEM), solid–state nuclear magnetic resonance (NMR) spectroscopy of <sup>27</sup>Al and <sup>29</sup>Si nuclei, and pyridine-adsorbed IR spectroscopy (IR–Py). Post-synthetic treatment was found to create micro-mesoporous structure and enhance the total surface area of the zeolites. As a result, an improved catalytic activity of the modified materials in comparison with parent ZSM-12 in <i>m</i>-xylene isomerization was established.</p>

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ZSM-12 zeolite: The influence of post-synthetic acidic and base treatment on its physicochemical properties and activity in m-Xylene isomerization

  • 期刊论文

  • 发表日期：

    2025年10月8日

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  • Dmitry Tsaplin,
  • Dmitry Gorbunov,
  • Vera Ostroumova,
  • Alexander Gorbunov,
  • Kaige Wang,
  • Zhongyang Luo,
  • Sergey Egazaryants,
  • Rustem Zairov,
  • Anton Maximov,
  • Evgeny Naranov

摘要

The search of appropriate methods for the synthesis of micro-mesoporous zeolites is of a high importance for the development of the catalysts with improved characteristics. This study investigates the influence of the base and acidic post-synthetic treatment on the physicochemical properties of ZSM-12 zeolite. A comprehensive suite of characterization techniques was employed to analyze the developed materials, including X–ray diffraction (XRD), X–ray fluorescence (XRF), low-temperature nitrogen adsorption-desorption, temperature-programmed desorption of ammonia (NH3–TPD), infrared spectroscopy (IR), scanning electron microscopy (SEM), elemental analysis, transmission electron microscopy (TEM), solid–state nuclear magnetic resonance (NMR) spectroscopy of 27Al and 29Si nuclei, and pyridine-adsorbed IR spectroscopy (IR–Py). Post-synthetic treatment was found to create micro-mesoporous structure and enhance the total surface area of the zeolites. As a result, an improved catalytic activity of the modified materials in comparison with parent ZSM-12 in m-xylene isomerization was established.