Abstract
A series of tungstophosphoric acid (TPA) catalysts supported on tantalum oxide (Ta2O5) were prepared and characterized by FT-infrared, X-ray diffraction, Laser Raman and temperature programmed desorption of ammonia. Characterization results suggest the presence of intact TPA on Ta2O5. The catalyst acidity varied with changes in TPA content and treatment temperature. The catalyst with 20 wt% TPA on Ta2O5 calcined at 300 °C exhibited maximum acidity. These catalysts were evaluated for the selective dehydration of fructose to 5-hydroxy methyl furfural (HMF). The catalysts showed near complete conversion of fructose and the yield of HMF depended on the acidity of the catalysts. The conversion and selectivity in the de hydration of fructose also depends on the reaction temperature and catalyst weight. The catalysts are stable and reusable with consistent activity.
Published Version
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