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<p>Catalytic dehydration of sorbitol to isosorbide is an important process for producing bio-based chemicals used in high-performance polymers and pharmaceuticals. In this study, sulfated zirconia (SZ) and SZ-supported zeolites (SZ/HZSM-5, SZ/Hβ, SZ/HY) were synthesized and characterized by XRD, FTIR, TEM, N<sub>2</sub> physisorption, and NH<sub>3</sub>-TPD. Among the tested catalysts, SZ/Hβ achieved 98% sorbitol conversion with 82% isosorbide selectivity at 220&#xa0;°C in 3&#xa0;h, surpassing many previously reported solid acids catalyst. This performance is attributed to the higher acidity of SZ/Hβ compared to the other catalysts, as confirmed by NH<sub>3</sub>-TPD. The catalysts also demonstrated recyclability with only a minor decrease in activity after four cycles. These findings establish SZ/Hβ as a promising, recyclable catalyst for sustainable isosorbide production, offering improved efficiency compared to earlier heterogeneous catalysts.</p>

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Catalytic Dehydration of Sorbitol to Isosorbide: Evaluating Performance of Sulfated Zirconia and Supported Zeolite Catalysts

  • 期刊论文

  • 发表日期：

    2025年9月25日

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  • Jay B. Trivedi,
  • Paresh H. Rana

摘要

Catalytic dehydration of sorbitol to isosorbide is an important process for producing bio-based chemicals used in high-performance polymers and pharmaceuticals. In this study, sulfated zirconia (SZ) and SZ-supported zeolites (SZ/HZSM-5, SZ/Hβ, SZ/HY) were synthesized and characterized by XRD, FTIR, TEM, N2 physisorption, and NH3-TPD. Among the tested catalysts, SZ/Hβ achieved 98% sorbitol conversion with 82% isosorbide selectivity at 220 °C in 3 h, surpassing many previously reported solid acids catalyst. This performance is attributed to the higher acidity of SZ/Hβ compared to the other catalysts, as confirmed by NH3-TPD. The catalysts also demonstrated recyclability with only a minor decrease in activity after four cycles. These findings establish SZ/Hβ as a promising, recyclable catalyst for sustainable isosorbide production, offering improved efficiency compared to earlier heterogeneous catalysts.