title: An efficient and heterogeneous recyclable silicotungstic acid with modified acid sites as a catalyst for conversion of fructose and sucrose into 5-hydroxymethylfurfural in superheated water.
abstract: Acidity modified silver exchanged silicotungstic acid (AgSTA) catalyst was prepared and characterized by X-ray diffraction, FT-IR spectroscopy, Raman spectroscopy, FT-IR pyridine adsorption, SEM imaging, EDX mapping, and antimicrobial activity was also tested. The catalytic activity was evaluated for the dehydration of fructose and sucrose in superheated water. As a result, 98% conversion of fructose with 85.7% HMF yield and 87.4% HMF selectivity in 120 min reaction time at 120 °C reaction temperature using 10 wt.% of AgSTA catalyst was achieved. While, 92% sucrose conversion with 62.5% of HMF yield was obtained from sucrose at uniform condition in 160 min. The effect of reaction parameters, such as reaction temperature, time, catalyst dosage, and effect acidity on HMF yield was also investigated. The AgSTA catalyst was separated from the reaction mixture by filtration process at end of the reaction and reused eight times without loss of catalytic activity.
authors: Department of Environmental Engineering and Energy, Energy and Environment Fusion Technology Center, Myongji University, Yongin, Kyonggi-do 449-728, Republic of Korea.
authors: Arvind H
authors: AH
authors: Jadhav
authors: Hern
authors: H
authors: Kim
authors: In Taek
authors: IT
authors: Hwang
mesh_terms: D056804:Biofuels; D002384:Catalysis; D005632:Fructose / Q000737:chemistry*; D005662:Furaldehyde / Q000031:analogs & derivatives* / Q000138:chemical synthesis; D006358:Hot Temperature; D008855:Microscopy, Electron, Scanning; D015394:Molecular Structure; D017640:Silicates / Q000737:chemistry*; D012834:Silver; D013052:Spectrometry, X-Ray Emission; D017550:Spectroscopy, Fourier Transform Infrared; D013059:Spectrum Analysis, Raman; D013395:Sucrose / Q000737:chemistry*; D017973:Tungsten Compounds / Q000737:chemistry*; D014867:Water; D014961:X-Ray Diffraction
chemical_list: D056804:Biofuels; D017640:Silicates; D017973:Tungsten Compounds; D014867:Water; D005632:Fructose; D012834:Silver; D013395:Sucrose; C008046:5-hydroxymethylfurfural; D005662:Furaldehyde; C021746:silicotungstic acid