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<p>This study aimed to synthesize a novel mesoporous template agent, KHBA, using 3-glycidoxypropyltrimethoxysilane (KH-560) and butylamine as raw materials, and to explore its application in the synthesis of ZSM-5 zeolites with nanocrystal aggregates. The physical and chemical properties of the synthesized ZSM-5 zeolites were characterized using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), transmission electron microscopy (TEM), thermogravimetric analysis (TG), and low-temperature N<sub>2</sub> adsorption–desorption The results showed that the introduction of KHBA effectively inhibited excessive crystal growth and promoted the formation of nanocrystal aggregates with a mesoporous structure. In the synthesis system with a KHBA-to-Al<sub>2</sub>O<sub>3</sub> molar ratio ranging from 1.6 to 4.8, the external surface area and mesoporous volume of the samples increased with increasing KHBA content. The sample synthesized with a KHBA-to-Al<sub>2</sub>O<sub>3</sub> molar ratio of 4.8 exhibited the highest external surface area (250.43 m<sup>2</sup>/g) and mesoporous volume (0.24 cm<sup>3</sup>/g). In the catalytic performance test for C8 aromatic hydrocarbon isomerization, the catalyst prepared with a KHBA-to-Al<sub>2</sub>O<sub>3</sub> molar ratio of 4.8 demonstrated the best performance, with isomerization activity of 23.79%, ethylbenzene conversion of 88.94%, and xylene loss of 3.42%. These findings highlight the potential of KHBA as an effective template agent for the synthesis of high-performance ZSM-5 zeolites in catalytic applications.</p>

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Synthesis of nanocrystalline aggregate ZSM-5 zeolite with novel organosiloxane and the catalytic for C8 aromatics isomerization

  • 期刊论文

  • 发表日期：

    2025年6月24日

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  • Yunlong Ding,
  • Jiayin Wang,
  • Yanting Zhang,
  • Yongzhi Pu,
  • Nan Hou,
  • Ning Li,
  • Jinrui Song,
  • Yaning Liang,
  • Xiaofeng Li

摘要

This study aimed to synthesize a novel mesoporous template agent, KHBA, using 3-glycidoxypropyltrimethoxysilane (KH-560) and butylamine as raw materials, and to explore its application in the synthesis of ZSM-5 zeolites with nanocrystal aggregates. The physical and chemical properties of the synthesized ZSM-5 zeolites were characterized using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), transmission electron microscopy (TEM), thermogravimetric analysis (TG), and low-temperature N2 adsorption–desorption The results showed that the introduction of KHBA effectively inhibited excessive crystal growth and promoted the formation of nanocrystal aggregates with a mesoporous structure. In the synthesis system with a KHBA-to-Al2O3 molar ratio ranging from 1.6 to 4.8, the external surface area and mesoporous volume of the samples increased with increasing KHBA content. The sample synthesized with a KHBA-to-Al2O3 molar ratio of 4.8 exhibited the highest external surface area (250.43 m2/g) and mesoporous volume (0.24 cm3/g). In the catalytic performance test for C8 aromatic hydrocarbon isomerization, the catalyst prepared with a KHBA-to-Al2O3 molar ratio of 4.8 demonstrated the best performance, with isomerization activity of 23.79%, ethylbenzene conversion of 88.94%, and xylene loss of 3.42%. These findings highlight the potential of KHBA as an effective template agent for the synthesis of high-performance ZSM-5 zeolites in catalytic applications.