A highly effective approach to enhance the performance of biomass-derived acid for fructose conversion to 5-hydroxymethylfurfural

Synthesis of 5-hydroxymethylfurfural (HMF) from carbohydrate is one of vital step for bio-refinery development. In this work, a novel strategy was developed for catalytic conversion of fructose to HMF in 2-butanol. The inexpensive ionic liquids were used to adjust the acidity of biobased acid catalyst for enhancing the dehydration of fructose to HMF. The combination of 1-butyl-3-methylimidazolium chloride ([Bmim]Cl) with oxalic acid afforded an excellent HMF yield of 97.1% at 98.7% fructose conversion under mild conditions of 100 °C and 60 min, owing to the enhanced dissociation ability of oxalic acid by [Bmim]Cl. A possible dissociation mechanism of oxalic acid induced by [Bmim]Cl was proposed based on control experiments and detailed analyses with NMR and FT-IR techniques. It involved that the [Bmim]Cl interacted with oxalic acid through hydrogen bond, which decreased the electron density of oxygen atom on hydroxyl group and weakened the O-H bond, thus making the hydrogen in the O-H group to easily dissociate in the form of H+. Moreover, the reusability of oxalic acid and [Bmim]Cl was demonstrated, and both could be reused up to six times without significant loss in activity © 2022

Authors
Song X.1, 2 , Liao Y.2 , Liu T.1 , Yin D.1 , Wang H. 2 , Chen L.2 , Ma L. 2 , Yang H.3 , Voskressensky L.G. 4 , Wang C.2
Publisher
Elsevier B.V.
Language
English
Status
Published
Number
107318
Volume
234
Year
2022
Organizations
  • 1 School of Physical and Electronic Sciences, Chuxiong Normal University, Chuxiong, 675099, China
  • 2 CAS Key Laboratory of Renewable Energy, Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou, 510640, China
  • 3 Energy Research Institute, Academy of Macroeconomics, National Development and Reform Commission, Beijing, 100038, China
  • 4 Organic Chemistry Department of the Russian Peoples Friendship University, Moscow, 117198, Russian Federation
Keywords
5-hydroxymethylfurfural; Acidity regulation; Biobased catalyst; Carbohydrate; Ionic liquids additive
Date of creation
06.07.2022
Date of change
06.07.2022
Short link
https://repository.rudn.ru/en/records/article/record/83522/
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