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Hydrodeoxygenation of Guaiacol over Ceria–Zirconia Catalysts
Author(s) -
Schimming Sarah M.,
LaMont Onaje D.,
König Michael,
Rogers Allyson K.,
D'Amico Andrew D.,
Yung Matthew M.,
Sievers Carsten
Publication year - 2015
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201500317
Subject(s) - hydrodeoxygenation , guaiacol , catalysis , cubic zirconia , chemistry , chemical engineering , materials science , inorganic chemistry , organic chemistry , selectivity , ceramic , engineering
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 % CeO 2 and 40 mol % ZrO 2 . Pseudo‐first‐order activation energies of 97–114 kJ mol −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.