K. Lourvanij et Gl. Rorrer, REACTION-RATES FOR THE PARTIAL DEHYDRATION OF GLUCOSE TO ORGANIC-ACIDS IN SOLID-ACID, MOLECULAR-SIEVING CATALYST POWDERS, Journal of chemical technology and biotechnology, 69(1), 1997, pp. 35-44
Molecular-sieving catalysts have the potential to promote the producti
on of oxygenated hydrocarbons from glucose. A kinetic model for the pa
rtial dehydration of glucose to organic acids by micro- and mesoporous
aluminosilicate catalysts was developed. Kinetic parameters were esti
mated from glucose conversion and product yield versus time data at 15
0 degrees C for HY-zeolite, aluminum-pillared montmorillonite, MCM-20
and MCM-41 catalyst powders of 0.5 mmol H+ g(-1) solid-acid activity,
Rate constants for the partial dehydration of glucose to 5-hydroxymeth
ylfurfural (HMF) and the rehydration and cleavage of HMF to formic aci
d and 4-oxopentanoic acid were maximized at catalyst pore diameters of
10-30 Angstrom. The final organic acid product yields were low, less
than 60% of theoretical for formic acid and 10% of theoretical for 4-o
xopentanoic acid, due to significant coke formation.