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

A1 Originalartikel i en vetenskaplig tidskrift (referentgranskad)


Interna författare/redaktörer


Publikationens författare: Markus H, Plomp AJ, Sandberg T, Nieminen V, Bitter JH, Murzin DY
Förläggare: ELSEVIER SCIENCE BV
Publiceringsår: 2007
Tidskrift: Journal of Molecular Catalysis A: Chemical
Tidskriftsakronym: J MOL CATAL A-CHEM
Volym: 274
Nummer: 1-2
Artikelns första sida, sidnummer: 42
Artikelns sista sida, sidnummer: 49
Antal sidor: 8
ISSN: 1381-1169


Abstrakt

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.


Nyckelord

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

Senast uppdaterad 2019-25-08 vid 07:38