Liquid-phase dehydration of D-xylose over microporous and mesoporous niobium silicates
authors Dias, AS; Lima, S; Brandao, P; Pillinger, M; Rocha, J; Valente, AA
nationality International
journal CATALYSIS LETTERS
author keywords xylose; furfural; dehydration; acid catalysis; niobium silicates; microporous; mesoporous
keywords MOLECULAR-SIEVES; ACID CATALYSTS; 5-HYDROXYMETHYL-2-FURALDEHYDE; TEMPERATURE; ALCOHOLS; KETOSES; MCM-41; AM-11
abstract Microporous AM-11 crystalline niobium silicates were studied as solid acid catalysts for the dehydration of xylose in a water-toluene solvent mixture at 140-180 degrees C. After 6 h at 160 degrees C, xylose conversions of up to 90% and furfural yields of up to 50% were achieved, and the catalysts could be reused without loss of activity or selectivity. The calcined AM-11 catalysts gave higher furfural yields than HY zeolite and mordenite, under identical reaction conditions. Ordered mesoporous MCM-41-type niobium silicates with Si/Nb molar ratios of either 25 or 50 were also found to be recyclable catalysts for xylose dehydration, and gave furfural yields consistently in the range of 34-39% (after 6 h reaction at 160 degrees C).
publisher SPRINGER
issn 1011-372X
year published 2006
volume 108
issue 3-4
beginning page 179
ending page 186
digital object identifier (doi) 10.1007/s10562-006-0046-6
web of science category Chemistry, Physical
subject category Chemistry
unique article identifier WOS:000237120800011
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