Relaxation Processes during the Selective Oxidation of Aqueous Ethanol with Oxygen on a Platinum Catalyst

Abstract

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Oxidation of Alcohols with Molecular Oxygen on Solid Catalysts

“…More details on the engineering aspects of alcohol oxidation can be found elsewhere. 19,59,90,[95][96][97][98][99][100][101] Formation of strongly adsorbed byproducts during alcohol oxidation on Pt-group metals has been frequently reported. 43,80,85,89,102,103 Typical side reactions are the aldol condensation and oligomerization of the carbonyl compound product [104][105][106][107][108][109] and the decomposition of alcohols mainly via the carbonyl compound formed in situ, affording adsorbed CO and carbonaceous species (C x H y ) (Scheme 5).…”

“…In a batch reactor, the rate of alcohol dehydrogenation decreases with reaction time due to a decrease of alcohol concentration; thus, the rate of oxygen supply has to be adjusted by, e.g., decreasing the oxygen concentration or increasing the temperature toward the end of the reaction. More details on the engineering aspects of alcohol oxidation can be found elsewhere. ,,,− …”

Clean Oxidation of Alcohols in a Trickle-Bed Reactor with Liquid Flow Modulation

“…Another factor, typical of alcohol oxidation with molecular oxygen on noble metals, is deactivation of the catalyst due to over-oxidation. It is well-documented that a prolonged contact of a Pt catalyst with high levels of oxygen can induce this effect. ,,,, This phenomenon is a reversible deactivation, and the activity will be recovered during the wet cycle. The volatility of the liquid reactant constitutes an additional effect.…”

“…It is welldocumented that a prolonged contact of a Pt catalyst with high levels of oxygen can induce this effect. 1,7, 10,33,34 This phenomenon is a reversible deactivation, and the activity will be recovered during the wet cycle. The volatility of the liquid reactant constitutes an additional effect.…”

Determination and perturbation of the electronic potentials of solid catalysts for innovative catalysis

“…With concurrent detection of substances produced by thermal catalysis as a measure of the reaction rate, the potential-performance correlation can be established. 32,33 Obviously, the limitation of this application is only for materials to be conductive enough to achieve electronic circuits. The employed electrochemical setup therein does not necessarily require well-dened clean systems such as single crystals, and thus would be tolerant to some impurities to the same extent as industrialized electrochemical processes.…”