title: Acidic Zeolite L as a Highly Efficient Catalyst for Dehydration of Fructose to 5-Hydroxymethylfurfural in Ionic Liquid.
abstract: Zeolite L was synthesized by the hydrothermal method and post-treated by NH4exchange to adjust its acidity. The samples were systematic characterized by various techniques including XRD, X-ray fluorescence spectroscopy, N2adsorption-desorption, scanning electron microscopy, pyridine IR spectroscopy, and NH3temperature-programmed desorption. The results demonstrated that the NH4-exchange post-treatment increased the surface area, micropore volume, and acidity of zeolite L. The catalytic performance of the samples was tested in the dehydration of fructose to 5-hydroxymethylfurfural (HMF) in ionic liquid (1-butyl-3-methylimidazolium bromide, [bmim]Br). 99.1 % yield of HMF was obtained when the KL-80 °C-1 h sample (KL zeolite treated with 1 m NH4NO3solution at 80 °C for 1 h) was used. The high efficiency could be attributed to the appropriate acid properties of the catalyst. The zeolite catalyst could be reused four times without significant decrease in activity.
authors.affiliation: Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, Ningbo, 315201, P.R. China.
authors.forename: Zhongsen
authors.initials: Z
authors.lastname: Ma
authors.affiliation: Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, Ningbo, 315201, P.R. China.
authors.forename: Hualei
authors.identifier: 0000-0002-3271-0109
authors.initials: H
authors.lastname: Hu
authors.affiliation: Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, Ningbo, 315201, P.R. China.
authors.forename: Zhongqiang
authors.initials: Z
authors.lastname: Sun
authors.affiliation: Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, Ningbo, 315201, P.R. China.
authors.forename: Wenting
authors.initials: W
authors.lastname: Fang
authors.affiliation: Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, Ningbo, 315201, P.R. China.
authors.forename: Jian
authors.initials: J
authors.lastname: Zhang
authors.affiliation: Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, Ningbo, 315201, P.R. China.
authors.forename: Longfei
authors.initials: L
authors.lastname: Yang
authors.affiliation: Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, Ningbo, 315201, P.R. China.
authors.forename: Yajie
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, Ningbo, 315201, P.R. China.
authors.forename: Lei
authors.initials: L
authors.lastname: Wang
mesh_terms: D000143:Acids / Q000737:chemistry*; D002384:Catalysis; D005632:Fructose / Q000737:chemistry*; D005662:Furaldehyde / Q000031:analogs & derivatives* / Q000737:chemistry; D006358:Hot Temperature; D052578:Ionic Liquids / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D017550:Spectroscopy, Fourier Transform Infrared; D014867:Water / Q000737:chemistry; D014961:X-Ray Diffraction; D017641:Zeolites / Q000737:chemistry*
chemical_list: D000143:Acids; D052578:Ionic Liquids; D014867:Water; D017641:Zeolites; D005632:Fructose; C008046:5-hydroxymethylfurfural; D005662:Furaldehyde
keywords: 5-hydroxymethylfurfural; NH4-exchange; fructose dehydration; ionic liquids; zeolites