Dehydration of Xylose into Furfural in the Presence of Crystalline Microporous Silicoaluminophosphates

authors	Lima, S; Fernandes, A; Antunes, MM; Pillinger, M; Ribeiro, F; Valente, AA
nationality	International
journal	CATALYSIS LETTERS
author keywords	Xylose; Furfural; Dehydration; Silicoaluminophosphate; Microporous; Solid acid
keywords	LIQUID-PHASE DEHYDRATION; SOLID ACID CATALYSTS; 12-TUNGSTOPHOSPHORIC ACID; MOLECULAR-SIEVES; ZEOLITE; FRUCTOSE; GLUCOSE; SAPO-5
abstract	Microporous silicoaluminophosphates SAPO-5, SAPO-11 and SAPO-40 have been tested as solid acid catalysts in the dehydration of xylose into furfural (FUR) under biphasic aqueous-organic conditions, at 170 degrees C. For all materials, no decrease in catalytic activity is observed after three consecutive recycling runs. Furfural yields at 4 h using SAPO-11 (34-38%) are comparable with that for HMOR zeolite with Si/Al similar to 6 (34%), under similar reaction conditions, while H(2)SO(4) (0.03 M) gives 2% FUR. Complete xylose conversion is reached within 16-24 h, with furfural yields of up to 65%. Bronsted and Lewis acidity of the silicoaluminophosphates was determined through FTIR analysis of adsorbed pyridine, and tentatively correlated with the catalytic performances.
publisher	SPRINGER
issn	1011-372X
year published	2010
volume	135
issue	1-2
beginning page	41
ending page	47
digital object identifier (doi)	10.1007/s10562-010-0259-6
web of science category	Chemistry, Physical
subject category	Chemistry
unique article identifier	WOS:000275090400007