Hydrodeoxygenation of Guaiacol over Ceria–Zirconia Catalysts. Issue 12 (3rd June 2015)

• Record Type: Journal Article
• Authors: Schimming, Sarah M.; LaMont, Onaje D.; König, Michael; Rogers, Allyson K.; D'Amico, Andrew D.; Yung, Matthew M.; Sievers, Carsten
• Is Part Of: ChemSusChem. Volume 8:Issue 12(2015:Jun.)
• Page Start: 2073
• Page End: 2083
• Publication Date: 2015-06-03
• Subjects: Green chemistry -- Periodicals; Sustainable engineering -- Periodicals; Chemistry -- Periodicals; Chemical engineering -- Periodicals; 660
• DOI: 10.1002/cssc.201500317
• Languages: English
• ISSNs: 1864-5631

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>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‐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.</p> </abstract>