Phophotungstic acid (HPW) supported on activated carbon (AC) was prepared and used for dehydration of fructose to 5-hydroxymethylfurfural (HMF), a biomass-derived precursor for chemicals and fuels. Different characterization techniques showed that Keggin structure of HPW was maintained after impregnation process by incipient wetness method with ethanol as solvent. The high mass content of the active phase (50 wt%) on the support resulted in accessible acid sites and high acid density, important for the dehydration reaction. The effects of reaction time, catalyst amount, and temperature were investigated. The catalytic system with dimethyl sulfoxide (DMSO) as solvent provided an efficient transformation of fructose to HMF, resulting in high HMF yields (99.3 %) and total fructose conversion after 30 min of reaction at 140 °C. Fructose conversion was not significantly affected by the catalyst amount. On the other hand, the increase in temperature resulted in greater and faster conversion. HMF yield was deeply affected by all reaction variables. Moreover, HPW/AC was reused five times without significant loss of activity. Additionally, a kinetic evaluation was performed and the activation energy of fructose conversion to HMF was 109.4 kJmol⁻¹.

制备了负载在活性炭（AC）上的磷钨酸（HPW），并将其用于将果糖脱水成5-羟甲基糠醛（HMF），后者是生物质衍生的化学品和燃料前体。不同的表征技术表明，以乙醇为溶剂，采用湿法浸渍法浸渍后，HPW的Keggin结构得以保持。载体上活性相的高质量含量（50 wt％）导致可及的酸位和高酸密度，这对脱水反应很重要。研究了反应时间，催化剂用量和温度的影响。以二甲亚砜（DMSO）为溶剂的催化体系可将果糖有效转化为HMF，在140°C下反应30分钟后，HMF产率高（99.3％），总果糖转化率高。果糖转化率不受催化剂用量的显着影响。另一方面，温度的升高导致更大和更快的转化。HMF收率受所有反应变量的影响很大。此外，HPW / AC被重复使用了五次，而没有明显的活动损失。此外，进行了动力学评估，果糖转化为HMF的活化能为109.4 kJmol^-1。