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<p>In this work, sulfonic acid group modified ZSM-5 (SFZ-<i>x</i>, <i>x</i> presents the weight percentage of mercaptopropyltrimethoxysilane during preparation) has been prepared by introducing sulfydryl on ZSM-5 and then oxidizing them into the sulfonic acid group. The obtained samples were characterized by XRD, N<sub>2</sub> adsorption/desorption, FTIR, and SEM and studied the catalytic performance in the hydration of cyclohexene to produce cyclohexanol. The characterization results showed that with the introduction of -SO<sub>3</sub>H, the crystallinity of SFZ-15 decreased slightly, and the Brønsted acid sites obviously increased, while the pore structure was almost unchanged inside the ZSM-5 zeolites. Therefore, SFZ-15 exhibits better catalytic performance in the hydration of cyclohexene to produce cyclohexanol compared to commercial ZSM-5. Furthermore, this SFZ-15 catalyst kept the conversion of cyclohexene over 12% and the selectivity of cyclohexanol over 99% even after five runs, demonstrating the benefit of –SO<sub>3</sub>H functionalization on the activity improvement of traditional ZSM-5 catalyst.</p> Graphical abstract <p> The sulfonic acid group modified ZSM-5 zeolite has been prepared by introducing sulfydryl on ZSM-5 and then oxidizing them into the sulfonic acid group. The prepared catalyst exhibits excellent catalytic performance in the hydration of cyclohexene to produce cyclohexanol.</p>

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Sulfonic acid group modified ZSM-5 zeolite as a highly active catalyst for the hydration of cyclohexene to cyclohexanol

  • 期刊论文

  • 发表日期：

    2025年4月29日

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  • Yi Chen,
  • Heman Qin,
  • Qian Zhang,
  • Yatao Wang,
  • Yunkai Lv,
  • Libo Niu

摘要

In this work, sulfonic acid group modified ZSM-5 (SFZ-x, x presents the weight percentage of mercaptopropyltrimethoxysilane during preparation) has been prepared by introducing sulfydryl on ZSM-5 and then oxidizing them into the sulfonic acid group. The obtained samples were characterized by XRD, N2 adsorption/desorption, FTIR, and SEM and studied the catalytic performance in the hydration of cyclohexene to produce cyclohexanol. The characterization results showed that with the introduction of -SO3H, the crystallinity of SFZ-15 decreased slightly, and the Brønsted acid sites obviously increased, while the pore structure was almost unchanged inside the ZSM-5 zeolites. Therefore, SFZ-15 exhibits better catalytic performance in the hydration of cyclohexene to produce cyclohexanol compared to commercial ZSM-5. Furthermore, this SFZ-15 catalyst kept the conversion of cyclohexene over 12% and the selectivity of cyclohexanol over 99% even after five runs, demonstrating the benefit of –SO3H functionalization on the activity improvement of traditional ZSM-5 catalyst.

Graphical abstract

The sulfonic acid group modified ZSM-5 zeolite has been prepared by introducing sulfydryl on ZSM-5 and then oxidizing them into the sulfonic acid group. The prepared catalyst exhibits excellent catalytic performance in the hydration of cyclohexene to produce cyclohexanol.