化学活化法制备掺锆活性炭用于 5-羟甲基糠醛催化转移氢化为 2,5-二羟甲基呋喃,Energy & Fuels

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化学活化法制备掺锆活性炭用于 5-羟甲基糠醛催化转移氢化为 2,5-二羟甲基呋喃
Energy & Fuels ( IF 5.2 ) Pub Date : 2022-11-01 , DOI: 10.1021/acs.energyfuels.2c02095
Yue Wang ₁ , Zhaohua Qi ₁ , Huai Liu ₁ , Junhua Zhang ₁ , Lincai Peng ₁

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5-羟甲基糠醛（HMF）作为连接生物质与呋喃环化合物的桥头堡备受关注。其加氢产物 2,5-二羟甲基呋喃 (DHMF) 是最重要的生物质衍生平台化学品之一。然而，一直需要制备高效、低成本的催化剂来将HMF选择性加氢为DHMF。在本文中，我们通过化学活化制备了锆掺杂活性炭。系统表征表明，由于其极高的比表面积，路易斯酸和路易斯碱位点之间的协同作用提供了用于将 HMF 催化转移氢化 (CTH) 为 DHMF 的锆掺杂活性炭的高活性。HMF 的转化率和 DHMF 的产率在 130 °C 2 h 时分别为 97.5 和 96.3%。该催化剂在氮气气氛中经550 ℃简单焙烧2 h后仍保持较高的催化活性。基于实验结果，建立了描述HMF催化转化为DHMF的动力学模型，具有良好的相关性（R ² > 0.93) 在测量数据和预测数据之间。开发的动力学可以提供有效的工具来监控过程和调整过程条件以获得所需的产品。

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Fabrication of Zirconium-Doped Activated Carbon by Chemical Activation for Catalytic Transfer Hydrogenation of 5-Hydroxymethylfurfural into 2,5-Dihydroxymethylfuran

5-Hydroxymethylfurfural (HMF) has received much attention as a bridgehead to connect biomass with furan ring chemicals. Its hydrogenation product, 2,5-dihydroxymethylfuran (DHMF), is one of the most important biomass-derived platform chemicals. However, the preparation of high-efficiency catalysts with low cost for the selective hydrogenation of HMF into DHMF is always needed. In this article, we prepared a zirconium-doped activated carbon by chemical activation. Systematic characterizations revealed that the high activity of zirconium-doped activated carbon for catalytic transfer hydrogenation (CTH) of HMF into DHMF was provided by the cooperative effect between Lewis acid and Lewis base sites due to its extremely high specific surface area. The conversion of HMF and the yield of DHMF are 97.5 and 96.3% at 130 °C for 2 h, respectively. The catalyst still maintained high catalytic activity after simple recalcination treatment at 550 °C for 2 h in nitrogen atmosphere. Based on the experimental results, a kinetic model describing the catalytic conversion of HMF into DHMF has been established, which has a good correlation (R² > 0.93) between the measured and predicted data. The developed kinetics can provide an effective tool to monitor the process and tailor the process conditions to obtain the desired product.

更新日期：2022-11-01

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