Aqueous phase reactions of pentoses in the presence of nanocrystalline zeolite beta: Identification of by-products and kinetic modelling

authors	Ferreira, LR; Lima, S; Neves, P; Antunes, MM; Rocha, SM; Pillinger, M; Portugal, I; Valente, AA
nationality	International
journal	CHEMICAL ENGINEERING JOURNAL
author keywords	Xylose; Furfural; Acid catalysis; Zeolite beta; Kinetic modelling
keywords	SOLID ACID CATALYSTS; D-XYLOSE; VOLATILE COMPONENTS; SUPERCRITICAL WATER; ACTIVE COMPOUNDS; HIGH-TEMPERATURE; SALMO-SALAR; DEHYDRATION; DEGRADATION; H-1-NMR
abstract	Furfural, a valuable platform chemical that has the potential to replace a variety of oil/coal/gas derived materials and chemical products, is produced by the dehydration of o-xylose, which in turn is obtained from lignocellulosic biomass. Herein, the conversion of xylose in the presence of nanocrystalline zeolite beta in the H+-form, using water as solvent, was investigated. Detailed batch kinetic studies and products identifications techniques (H-1, C-13 NMR and comprehensive two-dimensional gas chromatography (GC x GC) combined with time-of-flight mass spectrometry (ToFMS)) provided mechanistic insights into the overall reaction process. The conversion of xylose to furfural is accompanied by several side reactions, forming complex reaction mixtures. A pseudo-homogeneous kinetic model was proposed that fitted quite well the experimental data. (C) 2012 Elsevier B.V. All rights reserved.
publisher	ELSEVIER SCIENCE SA
issn	1385-8947
year published	2013
volume	215
beginning page	772
ending page	783
digital object identifier (doi)	10.1016/j.cej.2012.11.022
web of science category	Engineering, Environmental; Engineering, Chemical
subject category	Engineering
unique article identifier	WOS:000316032100093