Solvent- and Base-Free Oxidation of 5-Hydroxymethylfurfural over a PdO/AlPO4-5 Catalyst under Mild Conditions,Industrial & Engineering Chemistry Research

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Solvent- and Base-Free Oxidation of 5-Hydroxymethylfurfural over a PdO/AlPO4-5 Catalyst under Mild Conditions
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2021-09-10 , DOI: 10.1021/acs.iecr.1c01911
Linhao Yu ₁ , Hong Chen ₂ , Zhe Wen ₁ , Xueli Ma ₂ , Yingying Li ₂ , Yongdan Li _{1,

3}

Affiliation

A solvent-free method was proposed to upgrade the biomass-derived compound 5-hydroxymethylfurfural (HMF). The oxidation of HMF to produce 2,5-furandicarboxylic acid (FDCA) has been examined in the presence of O₂ without the addition of solvent and base. Different from the conversion of the aldehyde group on HMF as the initial oxidation step in H₂O solvent, the hydroxyl group on HMF was first oxidized and FDCA was finally generated without the addition of solvent. The role of O₂ is to replenish the consumption of active oxygen species on the catalyst surface. The oxidation of HMF to FDCA proceeded due to the solvent-free effect. A 83.6% FDCA selectivity at 38.8% HMF conversion was measured with a PdO/AlPO₄-5 catalyst at 80 °C for 5 h and the reaction mechanism was proposed.

中文翻译：

在 PdO/AlPO4-5 催化剂上在温和条件下无溶剂和无碱氧化 5-羟甲基糠醛

提出了一种无溶剂方法来升级生物质衍生的化合物 5-羟甲基糠醛 (HMF)。HMF 氧化生成 2,5-呋喃二甲酸 (FDCA) 已在 O ₂存在下进行了检测，而无需添加溶剂和碱。与 HMF 上的醛基转化作为 H ₂ O 溶剂中的初始氧化步骤不同，HMF 上的羟基首先被氧化，最终生成 FDCA，而无需添加溶剂。O ₂的作用是补充催化剂表面活性氧的消耗。由于无溶剂效应，HMF 氧化为 FDCA。使用 PdO/AlPO ₄在 38.8% HMF 转化率下测得 83.6% FDCA 选择性-5 催化剂在 80 °C 下反应 5 h 并提出了反应机理。

更新日期：2021-09-22

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