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<p>The conversion of cellulose to 5-hydroxymethylfurfural (HMF) catalyzed by AlCl₃ in 1,4-dioxane (DIOX)/water biphasic cosolvent system were systematically investigated. The influence of key reaction parameters on product distribution was explored. It was found that salting‐out agents can significantly enhance the yield of HMF. The conversion of cellulose and yield of HMF were 96.71% and 57.33% respectively with cellulose at 20&#xa0;g/L, AlCl<sub>3</sub> at 5&#xa0;mmol/L, DIOX volume fraction at 80%, mass ratio of NaCl to cellulose at 30%, reaction temperature at 190&#xa0;°C, and reaction time of 6&#xa0;min. The kinetics parameters of HMF from cellulose and glucose were determined. The results indicated that the hydrolysis of cellulose to glucose represents the rate-limiting step, which required substantially higher activation energy compared to the subsequent degradation of glucose and HMF. These provided valuable insights into the challenges associated with cellulose conversion and offered strategies for HMF production from cellulose.</p>

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Preparation of 5-hydroxymethylfurfural from cellulose catalyzed by AlCl3 in 1,4-dioxane/water biphasic cosolvent system

  • 期刊论文

  • 发表日期：

    2025年6月4日

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  • Ge Xi,
  • Qiang Liu,
  • Peining Li,
  • Tao Wu,
  • Lishu Shao,
  • Lin Zhang,
  • Chao Liu,
  • Zhiping Wu

摘要

The conversion of cellulose to 5-hydroxymethylfurfural (HMF) catalyzed by AlCl₃ in 1,4-dioxane (DIOX)/water biphasic cosolvent system were systematically investigated. The influence of key reaction parameters on product distribution was explored. It was found that salting‐out agents can significantly enhance the yield of HMF. The conversion of cellulose and yield of HMF were 96.71% and 57.33% respectively with cellulose at 20 g/L, AlCl3 at 5 mmol/L, DIOX volume fraction at 80%, mass ratio of NaCl to cellulose at 30%, reaction temperature at 190 °C, and reaction time of 6 min. The kinetics parameters of HMF from cellulose and glucose were determined. The results indicated that the hydrolysis of cellulose to glucose represents the rate-limiting step, which required substantially higher activation energy compared to the subsequent degradation of glucose and HMF. These provided valuable insights into the challenges associated with cellulose conversion and offered strategies for HMF production from cellulose.