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

H Markus, AJ Plomp, Thomas Sandberg, V Nieminen, JH Bitter, Dmitry Murzin

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

29 Citeringar (Scopus)

Sammanfattning

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.
OriginalspråkOdefinierat/okänt
Sidor (från-till)42–49
Antal sidor8
TidskriftJournal of Molecular Catalysis A: Chemical
Volym274
Utgåva1-2
DOI
StatusPublicerad - 2007
MoE-publikationstypA1 Tidskriftsartikel-refererad

Nyckelord

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

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