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<p>A series of Pt-based catalysts supported on morphology-controlled ZSM-5 zeolites were synthesized and applied for toluene catalytic oxidation. The results demonstrated that the catalyst Pt supported on sheet-like ZSM-5 (Pt/S-ZSM) exhibited significantly higher activity than those supported on chain-like ZSM-5 (Pt/C-ZSM) and unmodified ZSM-5 (Pt/N-ZSM). The sheet-like morphology ZSM-5 zeolites exhibited a toluene saturation capacity of 65.17&#xa0;mg·g<sup>−1</sup>, with breakthrough time and saturation adsorption increased by 2.4-fold and 1.4-fold, respectively, compared to unmodified N-ZSM-5. Notably, compared to 0.5wt% Pt/C-ZSM, the 0.5wt% Pt/S-ZSM catalyst exhibited a significantly lower apparent activation energy (11.63&#xa0;kJ·mol<sup>−1</sup>), confirming the superior suitability of S-ZSM as a Pt support. This was further evidenced by its exceptional catalytic activity, achieving 90% toluene conversion (T<sub>90</sub>) at just 181℃. The Pt/S-ZSM showed well catalytic activity and structural stability during the toluene catalytic combustion, which reflected a promising catalyst for practical application.</p>

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Preparation of morphology-controlled ZSM-5 zeolites adsorbent and Pt/ZSM-5 catalysts: toluene adsorption and catalytic oxidation performance

  • 期刊论文

  • 发表日期：

    2025年10月24日

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  • Weibing Deng,
  • Rui Zhang,
  • Wei Deng,
  • Shuai Wang,
  • Qiongyu Liu,
  • Haoran Chang

摘要

A series of Pt-based catalysts supported on morphology-controlled ZSM-5 zeolites were synthesized and applied for toluene catalytic oxidation. The results demonstrated that the catalyst Pt supported on sheet-like ZSM-5 (Pt/S-ZSM) exhibited significantly higher activity than those supported on chain-like ZSM-5 (Pt/C-ZSM) and unmodified ZSM-5 (Pt/N-ZSM). The sheet-like morphology ZSM-5 zeolites exhibited a toluene saturation capacity of 65.17 mg·g−1, with breakthrough time and saturation adsorption increased by 2.4-fold and 1.4-fold, respectively, compared to unmodified N-ZSM-5. Notably, compared to 0.5wt% Pt/C-ZSM, the 0.5wt% Pt/S-ZSM catalyst exhibited a significantly lower apparent activation energy (11.63 kJ·mol−1), confirming the superior suitability of S-ZSM as a Pt support. This was further evidenced by its exceptional catalytic activity, achieving 90% toluene conversion (T90) at just 181℃. The Pt/S-ZSM showed well catalytic activity and structural stability during the toluene catalytic combustion, which reflected a promising catalyst for practical application.