Conversion of fructose, glucose, and cellulose to 5-hydroxymethylfurfural by alkaline earth phosphate catalysts in hot compressed water
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Author list: Daorattanachai P., Khemthong P., Viriya-Empikul N., Laosiripojana N., Faungnawakij K.
Publisher: Elsevier
Publication year: 2012
Journal: Carbohydrate Research (0008-6215)
Volume number: 363
Start page: 58
End page: 61
Number of pages: 4
ISSN: 0008-6215
eISSN: 1873-426X
Languages: English-Great Britain (EN-GB)
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Abstract
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 CaP 2O6 and α-Sr(PO3)2 crystalline phases of the catalyst samples, while acid strength of both catalysts was in a range of +3.3 ≤ H0 ≤ +4.8. From the study, CaP 2O6 and α-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 α-Sr(PO3)2 (34%) was higher than that over CaP2O6 (17.4%). © 2012 Elsevier Ltd. All rights reserved.
Keywords
Alkaline earth phosphate, Dehydration
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