title: Conversion of fructose, glucose, and cellulose to 5-hydroxymethylfurfural by alkaline earth phosphate catalysts in hot compressed water.
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(2)O(6) and α-Sr(PO(3))(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, CaP(2)O(6) and α-Sr(PO(3))(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(PO(3))(2) (34%) was higher than that over CaP(2)O(6) (17.4%).
authors.affiliation: Nanomaterials for Energy and Catalysis Laboratory, National Nanotechnology Center, National Science and Technology Development Agency, Klong Laung, Pathumthani 12120, Thailand.
authors.forename: Pornlada
authors.initials: P
authors.lastname: Daorattanachai
authors.forename: Pongtanawat
authors.initials: P
authors.lastname: Khemthong
authors.forename: Nawin
authors.initials: N
authors.lastname: Viriya-Empikul
authors.forename: Navadol
authors.initials: N
authors.lastname: Laosiripojana
authors.forename: Kajornsak
authors.initials: K
authors.lastname: Faungnawakij
mesh_terms: D002118:Calcium / Q000737:chemistry*; D002241:Carbohydrates / Q000737:chemistry*; D002384:Catalysis; D002482:Cellulose / Q000737:chemistry; D011232:Chemical Precipitation; D005632:Fructose / Q000737:chemistry; D005662:Furaldehyde / Q000031:analogs & derivatives* / Q000737:chemistry; D005947:Glucose / Q000737:chemistry; D006358:Hot Temperature; D010710:Phosphates / Q000737:chemistry*; D011312:Pressure; D013324:Strontium / Q000737:chemistry*; D014867:Water / Q000737:chemistry*
chemical_list: D002241:Carbohydrates; D010710:Phosphates; D014867:Water; D005632:Fructose; C008046:5-hydroxymethylfurfural; D002482:Cellulose; D005662:Furaldehyde; D005947:Glucose; D002118:Calcium; D013324:Strontium