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Title: Microkinetic Modeling of Benzyl Alcohol Oxidation on Carbon-Supported Palladium Nanoparticles

Journal Article · · ChemCatChem

Abstract Six products are formed from benzyl alcohol oxidation over Pd nanoparticles using O 2 as the oxidant: benzaldehyde, toluene, benzyl ether, benzene, benzoic acid, and benzyl benzoate. Three experimental parameters were varied here: alcohol concentration, oxygen concentration, and temperature. Microkinetic modeling using a mechanism published recently with surface intermediates was able to produce all 18 trends observed experimentally with mostly quantitative agreement. Approximate analytical equations derived from the microkinetic model for isothermal conditions reproduced the isothermal trends and provided insight. The most important activation energies are E a2 =57.9 kJ mol −1 , E a5 =129 kJ mol −1 , and E a6 =175 kJ mol −1 , which correspond to alcohol dissociation, alkyl hydrogenation, and the reaction of alkyl species with alkoxy species. Upper limits for other activation energies were identified. The concepts of a sticking coefficient and steric factor in solution were applied.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1295106
Alternate ID(s):
OSTI ID: 1401220
Journal Information:
ChemCatChem, Vol. 8, Issue 15; ISSN 1867-3880
Publisher:
ChemPubSoc EuropeCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 42 works
Citation information provided by
Web of Science

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Insights into how the aqueous environment influences the kinetics and mechanisms of heterogeneously-catalyzed COH* and CH 3 OH* dehydrogenation reactions on Pt(111) journal January 2019
Exploitation of missing linker in Zr-based metal-organic framework as the catalyst support for selective oxidation of benzyl alcohol journal November 2019
Selective Benzyl Alcohol Oxidation over Pd Catalysts journal September 2018