Glucose reactions with acid and base catalysts in hot compressed water at 473 K.
The effects of the homogeneous catalysts (H(2)SO(4) and NaOH) and heterogeneous catalysts (TiO(2) and ZrO(2)) on glucose reactions were examined in hot compressed water (473 K) by a batch-type reactor. From the homogeneous catalyst studies, we confirmed that the acid catalyst promoted dehydration, while isomerization of glucose to fructose was catalyzed by alkali. Anatase TiO(2) was found to act as an acid catalyst to promote formation of 5-hydroxymethylfuraldehyde (HMF). Zirconia (ZrO(2)) was a base catalyst to promote the isomerization of glucose. The effects of the additives were also confirmed through fructose reactions.
Watanabe
Masaru
M
Research Center of Supercritical Fluid Technology, Tohoku University, 6-6-11-403 Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan.
Aizawa
Yuichi
Y
Iida
Toru
T
Aida
Taku M
TM
Levy
Caroline
C
Sue
Kiwamu
K
Inomata
Hiroshi
H
D002384:Catalysis; D005632:Fructose / Q000138:chemical synthesis; D005662:Furaldehyde / Q000031:analogs & derivatives / Q000138:chemical synthesis; D005947:Glucose / Q000737:chemistry*; D006358:Hot Temperature; D007536:Isomerism; D011312:Pressure; D012972:Sodium Hydroxide / Q000737:chemistry*; D013464:Sulfuric Acids / Q000737:chemistry*; D014025:Titanium / Q000737:chemistry*; D014867:Water / Q000737:chemistry; D015040:Zirconium / Q000737:chemistry*
D013464:Sulfuric Acids; D014867:Water; C009495:titanium dioxide; D005632:Fructose; D012972:Sodium Hydroxide; C008046:5-hydroxymethylfurfural; D015040:Zirconium; D014025:Titanium; D005662:Furaldehyde; D005947:Glucose; C033158:sulfuric acid; C028541:zirconium oxide