| 微波与碳基催化剂协同促进果糖制5-羟甲基糠醛 |
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| 引用本文： | 吕孝琦,李洪,赵振宇,李鑫钢,高鑫,范晓雷.微波与碳基催化剂协同促进果糖制5-羟甲基糠醛[J].化工进展,2022,41(2):637-647. |
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| 作者姓名： | 吕孝琦 李洪 赵振宇 李鑫钢 高鑫 范晓雷 |
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| 作者单位： | 1.天津大学化工学院，精馏技术国家工程研究中心，天津 300350;2.曼彻斯特大学工程学院，化学工程与;分析科学系，英国 曼彻斯特 M13 9PL |
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| 基金项目： | 国家自然科学基金面上项目（21878219）； |
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| 摘 要： | 生物质转化为高附加值的化学品是替代石化产品的有效途径，微波与催化剂的协同作用有助于提升糖类的转化效率。碳材料具有良好的化学稳定性和介电性，是微波反应过程中理想的催化剂载体和吸波剂。为了探究碳基催化剂对微波场的响应能力，本文以4种碳材料为载体应用于果糖转化过程，包括碳纳米管（CNT）、碳纳米纤维（CNF）、炭黑（CB）和活性炭（AC）。以果糖转化率和5-羟甲基糠醛（5-HMF）收率为评价指标，对比不同催化剂在常规和微波加热条件下的催化性能，探究微波与不同载体的耦合作用对反应的强化效果。在微波场中测量不同碳材料悬浮液的温度曲线，评价碳基催化剂在微波场中的加热能力。通过表征样品结构和介电参数，解释载体与微波间耦合作用差异的原因。结果表明，碳基催化剂的微波诱导热效应可以有效提升反应转化率和收率，拥有高损耗角正切值和电导率的催化剂把微波能转化为热量的能力较强，更有助于将微波能量传递至反应表面。高比表面积、高长径比、低密度和高石墨化度的碳基催化剂也有利于产生微波热效应。另外，由于显著的微波热效应，碳纳米管基催化剂CNT-SA在4类催化剂中催化性能最优，以110℃微波辐射10min，5-HMF收率可达96.30%，且催化剂具有良好的循环使用性能。
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| 关 键 词： | 微波辐射 催化 碳基催化剂 果糖转化 5-羟甲基糠醛 |
| 收稿时间： | 2021-03-31 |
Microwave-assisted carbon-based catalysts for fructose dehydration to 5-hydroxymethylfurfural |
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| LYU Xiaoqi,LI Hong,ZHAO Zhenyu,LI Xingang,GAO Xin,FAN Xiaolei.Microwave-assisted carbon-based catalysts for fructose dehydration to 5-hydroxymethylfurfural[J].Chemical Industry and Engineering Progress,2022,41(2):637-647. |
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| Authors: | LYU Xiaoqi LI Hong ZHAO Zhenyu LI Xingang GAO Xin FAN Xiaolei |
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| Affiliation: | 1.National Engineering Research Center of Distillation Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China
2.Department of Chemical Engineering and Analytical Science, School of Engineering, University of Manchester, Manchester M13 9PL, United Kingdom |
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| Abstract: | Microwave(MW)-assisted biomass conversion is a promising method for the production of value-added chemicals. Carbon materials have good chemical stability and dielectric properties, which are ideal catalyst supports and microwave absorbers in the process of MW reaction. In view of this, four carbon materials, including carbon nanotubes(CNT), carbon nanofibers(CNF), carbon black(CB) and activated carbon(AC), were used to catalyst fructose conversion under conventional heating and MW irradiation conditions. The enhancement effects of MW coupling with different supports for the reaction performance were further explored. The heating behaviors of different carbon material suspensions were measured under MW condition, and the difference in their dielectric properties was explained by structural and physical properties. The results show that the MW induced thermal effect of carbon-based catalysts can effectively improve the reaction efficiency. The catalyst with high loss tangent and conductivity tends to have a strong heating ability, which is conductive to transfer MW energy to the catalyst surface. Carbon-based catalysts with high specific surface area, high aspect ratio, low density and high graphitization degree are also beneficial to the generation of thermal effect. In addition, CNT-SA is the most suitable catalyst among the four alternatives. The yield of 5-hydroxymethylfurfural(5-HMF) reaches 96.30% in 10min at 110℃ under MW irradiation, and the catalyst has a good recyclability. |
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| Keywords: | microwave irradiation catalysis carbon-based catalyst fructose dehydration 5-hydroxymethylfurfural |
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