Hydrodeoxygenation of Guaiacol over Ceria-Zirconia Catalysts

Matthew Yung, Sarah Schimming, Onaje LaMont, Michael Konig, Allyson Rogers, Andrew D'Amico, Carsten Sievers

Research output: Contribution to journalArticlepeer-review

114 Scopus Citations

Abstract

The hydrodeoxygenation of guaiacol is investigated over bulk ceria and ceria-zirconia catalysts with different elemental compositions. The reactions are performed in a flow reactor at 1 atm and 275-400 °C. The primary products are phenol and catechol, whereas cresol and benzene are formed as secondary products. No products with hydrogenated rings are formed. The highest conversion of guaiacol is achieved over a catalyst containing 60 mol% CeO2 and 40 mol% ZrO2. Pseudo-firstorder activation energies of 97-114 kJmol-1 are observed over the mixed metal oxide catalysts. None of the catalysts show significant deactivation during 72 h on stream. The important physicochemical properties of the catalysts are characterized by X-ray diffraction (XRD), temperature-programmed reduction, titration of oxygen vacancies, and temperature-programmed desorption of ammonia. On the basis of these experimental results, the reasons for the observed reactivity trends are identified.

Original languageAmerican English
Pages (from-to)2073-2083
Number of pages11
JournalChemSusChem
Volume8
Issue number12
DOIs
StatePublished - 2015

Bibliographical note

Publisher Copyright:
© 2015 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.

NREL Publication Number

  • NREL/JA-5100-64590

Keywords

  • Arenes
  • Bio-oil
  • Heterogeneous catalysis
  • Hydrodeoxygenation
  • Oxygen vacancies

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