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

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 nanocrys...

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Bibliographic Details
Published in:Chemical Engineering Journal
Main Authors: Ferreira, Luis R., Lima, Sergio, Neves, Patricia, Antunes, Margarida M., Rocha, Silvia M., Pillinger, Martyn, Portugal, Ines, Valente, Anabela A.
Format: Article in Journal/Newspaper
Language:English
Published: ELSEVIER SCIENCE SA 2013
Subjects:
SOLID ACID CATALYSTS
D-XYLOSE
VOLATILE COMPONENTS
SUPERCRITICAL WATER
ACTIVE COMPOUNDS
HIGH-TEMPERATURE
SALMO-SALAR
DEHYDRATION
DEGRADATION
H-1-NMR
Salmo salar
Online Access:http://hdl.handle.net/10773/20569
https://doi.org/10.1016/j.cej.2012.11.022
Description
Summary: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.

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