Perfect recycle and mechanistic role of hydrogen sulfate ionic liquids as additive in ethanol for efficient conversion of carbohydrates into 5-ethoxymethylfurfural

Haixin Guo, Alif Duereh, Yuya Hiraga, Taku M. Aida, Xinhua Qi, Richard Lee Smith

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)

Abstract

Hydrogen sulfate ionic liquid as co-solvent and homogeneous catalyst can promote efficient conversion of carbohydrates into 5-ethoxymethylfurfural (5-EMF). Yields of 5-EMF were as high as 77% and 43% from inulin and sucrose, respectively, in the mixed solvent system of ethanol-[BMIM][HSO4] for 30 min reaction time at 130 °C. The ionic liquid could be perfectly recycled with a single pretreatment of activated carbon for 24 h. Based on the characterization with 1H NMR and ATR-FTIR, the mechanism for the hydrogen sulfate ionic liquid promoted conversion of inulin into 5-EMF through stabilization of 5-hydroxymethylfurfural (5-HMF) with the C-2 hydrogen of the ionic liquid. Hydrogen sulfate ionic liquid as additive allows efficient conversion of carbohydrates into biofuels and as homogeneous catalysts, they can be easily reactivated and recycled with activated carbon treatment.

Original languageEnglish
Pages (from-to)287-294
Number of pages8
JournalChemical Engineering Journal
Volume323
DOIs
Publication statusPublished - 2017

Keywords

  • Biofuel
  • Biomass inulin
  • Reaction mechanism
  • Reactivation
  • Reuse of homogeneous catalyst

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

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