From woody biomass extractives to health-promoting substances: Selective oxidation of the lignan hydroxymatairesinol to oxomatairesinol over Au, Pd, and Au-Pd heterogeneous catalysts

Olga A. Simakova, Elena Smolentseva, Miguel Estrada, Elena V. Murzina, Sergey Beloshapkin, Stefan M. Willför, Andrey V. Simakov, Dmitry Yu Murzin*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

19 Citations (Scopus)

Abstract

Aerobic selective oxidation of the naturally occurring lignan hydroxymatairesinol (HMR) to another lignan oxomatairesinol (oxoMAT) was carried out at 70 °C and atmospheric pressure over different gold and gold-palladium catalysts. Several groups of gold catalysts were prepared: Au ion-exchanged on Y-zeolites promoted by Cu, Ni, Fe; Au and Au-Pd supported via deposition-precipitation with urea - DPU on metal oxides (magnesia, alumina, ceria, zirconia, and lanthanum oxide); and Au on alumina, and alumina-ceria-zirconia mixed oxides prepared by the sol-gel method. The catalysts were characterized by ICP-AES, TEM, XPS and UV-Vis techniques. Acidity of supports was studied by an FTIR method using pyridine as a probe molecule. No catalytic activity was detected in case of gold catalysts based on zeolites. Au and Au-Pd catalysts supported on metal oxides showed different activity and selectivity in the HMR transformation depending on the support acidity/basicity and the active phase. The highest activity was reached over Au supported on alumina with big transport pores displaying 100% selectivity to oxoMAT.

Original languageEnglish
Pages (from-to)95-103
Number of pages9
JournalJournal of Catalysis
Volume291
DOIs
Publication statusPublished - Jul 2012
MoE publication typeA1 Journal article-refereed

Keywords

  • Biomass
  • Gold
  • Hydroxymatairesinol (HMR)
  • Lignans
  • Oxomatairesinol (oxoMAT)
  • Palladium
  • Selective oxidation
  • Sol-gel

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