高校化学工程学报2025，Vol.39Issue(5)：868-875,8.DOI:10.3969/j.issn.1003-9015.2025.00.002
异丙醇介质中ZSM-5分子筛催化果糖脱水制备5-HMF的工艺研究
Process study on catalytic dehydration of fructose to 5-HMFover ZSM-5 zeolite in isopropanol
摘要
Abstract
5-Hydroxymethylfurfural(5-HMF)is one of the biomass-based platform compounds.To address the challenges in homogeneous catalysis for 5-HMF production,such as catalyst separation,high material consumption,and severe pollution,the production of 5-HMF from fructose via solid acid catalysis in the green solvent isopropanol was investigated in this study.Based on the screening of solid acid catalysts,the process,kinetics,and catalyst re-use were explored.It was found that nanoscale ZSM-5 zeolite with a silica-alumina ratio of 25 is an optimal catalyst for the dehydration of fructose to 5-HMF in isopropanol.The optimized process conditions were established as fol-lows:0.04 g of fructose,0.02 g of ZSM-5,4 mL of isopropanol,stirring at 500 rpm,and a reaction time of 4 hours at 150 ℃,yielding 59.1％of 5-HMF.Based on kinetic studies,the apparent activation energy for the dehydration of fructose to 5-HMF in isopropanol was found to be 61.74 kJ·mol-1.While catalyst reuse experiments show a de-crease in conversion,the selectivity remains largely unchanged.The crystal structure of the ZSM-5 catalyst was re-vealed to remain unchanged before and after use by characterization techniques including BET,XRD,and NH3-TPD,though the microporosity and acidity decrease,possibly due to the generation of humus that covered some a-cidic sites on the catalyst surface or partial blockage of the pores.This research provides new insights for the green and efficient production of 5-HMF.关键词
果糖/5-HMF/异丙醇/ZSM-5分子筛/脱水Key words
fructose/5-HMF/isopropanol/ZSM-5 molecular sieve/dehydration reaction分类
化学工程引用本文复制引用
任傲天,徐玲,秦雯琪,聂仁峰,吕秀阳..异丙醇介质中ZSM-5分子筛催化果糖脱水制备5-HMF的工艺研究[J].高校化学工程学报,2025,39(5):868-875,8.基金项目
国家自然科学基金(22278358,22078290). （22278358,22078290）
