P-216 Microwave-assisted Catalytic conversion of carbohydrates into 5-hydroxymethylfurfural in hot compressed water

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We studied on the production of 5-hydroxymethylfurfural (HMF) from D-glucose and D-fructose. We employed heterogeneous catalysts TiO_2 and ZrO_2 to examine the conversion of D-glucose and D-fructose into HMF in water at temperature up to 200℃ because HMF tends to rehydrate into levulinic acid and formic acid in the presence of homogeneous catalysts in aqueous solutions. In the case of TiO_2 employed for fructose reaction, 40% of HMF yield and 84% of fructose conversion was obtained for 5 min reaction. 30.5% of HMF yield and 65% of fructose conversion was obtained for 5 min reaction in the presence of ZrO_2. Indeed, ZrO_2 also promoted isomerization of glucose to fructose; the selectivity of fructose from glucose became higher than 60% with about 50% glucose conversion for 1min. Under the conditions (5 ml of 2 wt% fructose solution, 0.05 g of TiO_2, 200℃, and 3 min), fructose conversion and HMF yields by microwave heating (73% and 35% respectively) were higher than those by sand bath heating (27% and 12% respectively).
一般社団法人日本エネルギー学会の論文
2008-01-15