Dehydrogenation of hydroxymatairesinol to oxomatairesinol over carbon nanofibre-supported palladium catalysts

A1 Journal article (refereed)


Internal Authors/Editors


Publication Details

List of Authors: Markus H, Plomp AJ, Sandberg T, Nieminen V, Bitter JH, Murzin DY
Publisher: ELSEVIER SCIENCE BV
Publication year: 2007
Journal: Journal of Molecular Catalysis A: Chemical
Journal acronym: J MOL CATAL A-CHEM
Volume number: 274
Issue number: 1-2
Start page: 42
End page: 49
Number of pages: 8
ISSN: 1381-1169


Abstract

Dehydrogenation of the naturally occurring lignan hydroxymatairesinol to oxomatairesinol was performed over carbon nanofibre supported palladium catalysts (Pd/CNF) under nitrogen flow at 70 degrees C. To study the influence of support acidity on the catalyst performance, the amount of acid sites on the catalysts surface was varied by heat-treatment in nitrogen flow. It was concluded that both activity and selectivity to oxomatairesinol increased when the concentration of acid sites increased. The selectivity to oxomatairesinol was over 70% (at 4 h with 50% yield) when 2-propanol was used as solvent and the major by-product was 7-iso-propoxymatairesinol resulting from interactions with the solvent. In 2-pentanol, the selectivity increased to 90% (at 4 h with 50% yield). It was demonstrated that only one of the two diastereomers of hydroxymatairesinol preferentially yields oxomatairesinol. Quantum chemical calculations were performed as an attempt to explain this behaviour and to understand the role of acid sites. (c) 2007 Elsevier B.V. All rights reserved.


Keywords

acidity, carbon nanofibres, dehydrogenation, palladium, quantum chemical calculations

Last updated on 2019-23-08 at 07:28