Reorganization of Wells–Dawson Heteropoly Compounds During the Oxygen Assisted Catalytic Reaction of 2-butanol: Effect of the Oxido-Reduction Strength of the Working Conditions
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The reorganization of a Wells–Dawson heteropoly compound during the oxygen assisted catalytic reaction of 2-butanol appears to be dictated by the oxido-reduction strength of the working conditions. Indeed, the oxido-reduction strength is a tool to smoothly induce the rearrangement of the Wells–Dawson compound and to stabilize a particular intermediate species, formed in situ, with most desired enhanced performances in selective oxidation processes. It thus appears clearly that the O2:2-butanol ratio of 5 allows to keep the selectivity in methyl-ethyl-ketone stable with time-on-stream. This feed seems to be a good compromise compared both to more reducing or oxidizing working conditions.
KeywordsWells–Dawson heteropoly compound Dehydration and oxidation of 2-butanol Rearrangement
E.A. thanks the Université catholique de Louvain for the financial support and the teaching assistant—PhD student position. The authors wish to thank the ‘Fonds National de la Recherche Scientifique’ (Belgium) for the acquisition of the XPS equipment. The involvement of Unité de catalyse et de chimie des matériaux divisés in the ‘Inanomat’ IUAP network sustained by the ‘Service public fédéral de programmation politique scientifique’ (Belgium) is also acknowledged. The Unité de catalyse et chimie des matériaux divisés is also involved in the ‘FAME’ Network of Excellence of the EU 6th FP, and in the Cost Action D41 sustained by the European Science Foundation.
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