Catalysis in flow: O2 effect on the catalytic activity of Ru(OH)x/Al2O3 during the aerobic oxidation of an alcohol

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Title: Catalysis in flow: O2 effect on the catalytic activity of Ru(OH)x/Al2O3 during the aerobic oxidation of an alcohol
Author(s): Hii, KM
Brazier, JB
Hellgardt, K
Item Type: Journal Article
Abstract: Changes in the turnover frequency (TOF) of Ru(OH)x/γ-Al2O3 during aerobic oxidation of benzyl alcohol in a plug flow differential reactor were monitored online using an inline FTIR instrument over extended periods of time (up to 72 h). A new equation for catalyst deactivation is derived, to account for the different lengths of time the catalyst is exposed to the reactants (benzyl alcohol and O2). Catalyst activity and stability are dependent on the amount of O2 in the system; catalyst deactivation can be attributed to two simultaneous processes: a fast and reversible inhibition by the benzoic acid side product and a slower and irreversible loss of catalytic sites due to reduction of Ru. At steady state, the reaction rate is zero-order in benzyl alcohol and partial positive order in O2. Finally, the suitability of a packed-bed (integral) reactor for the reaction is discussed.
Date of Acceptance: 4-Jan-2017
DOI: 10.1039/c6re00208k
ISSN: 2058-9883
Publisher: Royal Society of Chemistry
Start Page: 60
End Page: 67
Journal / Book Title: Reaction Chemistry and Engineering
Volume: 2
Sponsor/Funder: Engineering & Physical Science Research Council (E
Funder's Grant Number: EP/L003279/1
Keywords: Science & Technology
Physical Sciences
Chemistry, Multidisciplinary
Publication Status: Published
Open Access location:!divAbstract
Appears in Collections:Faculty of Engineering
Catalysis and Advanced Materials
Chemical Engineering
Faculty of Natural Sciences

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