Journal
CHEMICAL ENGINEERING JOURNAL
Volume 323, Issue -, Pages 287-294Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2017.04.111
Keywords
Biomass inulin; Biofuel; Reactivation; Reuse of homogeneous catalyst; Reaction mechanism
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Funding
- JSPS (Japan) [25289272]
- Japanese government (MEXT) (Japan)
- Grants-in-Aid for Scientific Research [16H04549] Funding Source: KAKEN
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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][HSO(4)1 for 30 min reaction time at 130 degrees C. The ionic liquid could be perfectly recycled with a single pretreatment of activated carbon for 24 h. Based on the characterization with H-1 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. (C) 2017 Elsevier B.V. All rights reserved.
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