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<p>Nanosized zeolite Y with high Si/Al ratio was successfully synthesized from coal gangue(denoted as CG) using an ultrasonic assisted two-step ageing method. The raw CG, its intermediates and as-synthesized zeolite samples were characterized by XRD, XRF, SEM, ICP-AES, N<sub>2</sub> adsorption–desorption, NH<sub>3</sub>-TPD. The extraction ratios of silica and alumina from CG reached 78.9% and 72.2%. The homogeneous initial gel was obtained by ultrasonic-assisted aging. The acid leaching residue (denoted as ALR) from CG was added to the aged initial gel, and after ageing, the FAU crystals with Si/Al ratio of 2.45 and size of 46&#xa0;nm were hydrothermally synthesized at 60&#xa0;°C. The results of TIPB (1.3.5-triisopropylbenzene) catalytic cracking tests showed that the as-synthesized zeolite Y had higher activity than the commercial catalyst HSZ-320 NAA. The above results suggest the economic route for synthesizing nanosized zeolite Y from CG instead of expensive raw materials.</p>

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Ultrasonic assisted synthesis of nanosized zeolite Y from coal gangue and its catalytic cracking performance

  • 期刊论文

  • 发表日期：

    2026年1月8日

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  • Chang Kuk Choe,
  • Jong Chol Han,
  • Hyok Sin,
  • Young Sik Kim,
  • Songchol Hong

摘要

Nanosized zeolite Y with high Si/Al ratio was successfully synthesized from coal gangue(denoted as CG) using an ultrasonic assisted two-step ageing method. The raw CG, its intermediates and as-synthesized zeolite samples were characterized by XRD, XRF, SEM, ICP-AES, N2 adsorption–desorption, NH3-TPD. The extraction ratios of silica and alumina from CG reached 78.9% and 72.2%. The homogeneous initial gel was obtained by ultrasonic-assisted aging. The acid leaching residue (denoted as ALR) from CG was added to the aged initial gel, and after ageing, the FAU crystals with Si/Al ratio of 2.45 and size of 46 nm were hydrothermally synthesized at 60 °C. The results of TIPB (1.3.5-triisopropylbenzene) catalytic cracking tests showed that the as-synthesized zeolite Y had higher activity than the commercial catalyst HSZ-320 NAA. The above results suggest the economic route for synthesizing nanosized zeolite Y from CG instead of expensive raw materials.