Conversion of fructose, glucose, and cellulose to 5-hydroxymethylfurfural by alkaline earth phosphate catalysts in hot compressed water
作者:Pornlada Daorattanachai、Pongtanawat Khemthong、Nawin Viriya-empikul、Navadol Laosiripojana、Kajornsak Faungnawakij
DOI:10.1016/j.carres.2012.09.022
日期:2012.12
The phosphates of alkaline earth metals (calcium and strontium) synthesized by precipitation process in acetone-water media system were used as catalysts for converting fructose, glucose, and cellulose to 5-hydroxymethylfurfural (HMF) under hot compressed water condition. It was found that the phosphates of calcium and strontium effectively catalyzed the HMF formation from fructose and glucose dehydration and cellulose hydrolysis/dehydration reaction, as compared with the non-catalytic system. The XRD analysis confirmed the CaP2O6 and alpha-Sr(PO3)(2) crystalline phases of the catalyst samples, while acid strength of both catalysts was in a range of +3.3 <= H-0 <= +4.8. From the study, CaP2O6 and alpha-Sr(PO3)(2) showed similar catalytic performance toward the dehydration of sugars, providing the HMF yields of 20-21% and 34-39% from glucose and fructose, respectively; whereas the total yield of glucose and HMF from the hydrolysis/dehydration of cellulose over alpha-Sr(PO3) 2 (34%) was higher than that over CaP2O6 (17.4%). (C) 2012 Elsevier Ltd. All rights reserved.