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|Title:||Aqueous phase reactions of pentoses in the presence of nanocrystalline zeolite beta: Identification of by-products and kinetic modelling|
|Author:||Ferreira, Luis R.|
Antunes, Margarida M.
Rocha, Silvia M.
Valente, Anabela A.
|Keywords:||SOLID ACID CATALYSTS|
|Publisher:||ELSEVIER SCIENCE SA|
|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.|
|Appears in Collections:||CICECO - Artigos|
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|Aqueous phase reactions of pentoses in the presence of nanocrystalline zeolite beta Identification of by-products and kinetic modelling_10.1016j.cej.2012.11.022.pdf||821.21 kB||Adobe PDF|
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