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- W1524368657 abstract "Publisher Summary The selectivity changes in the ammoxidation of propene and propane can be partly understood in terms of a change in the degree of reduction of the surface that would cause a change in the distribution of nucleophilic and electrophilic oxygen species in the pool of surface oxygen species. Antimony inhibits the surface reduction and the catalysts, with an antimony-enriched surface, therefore, exhibit a higher selectivity with a lower activity. Ammonia inhibits the formation of partial ammoxidation products by competitive adsorption. It can also modify the degree of reduction of the surface, and thereby shifting the selectivity of the reaction. To obtain a maximal selectivity to the partial ammoxidation products, a molar ammonia/propene ratio of less than one should be applied. The presence of ammonia in the ammoxidation is expected to change the degree of reduction of the catalyst at steady state conditions, and hence a change in selectivity is likely to occur. This chapter describes the influence of antimony and ammonia on the ammoxidation of propene and propane that are expected to have opposite effects. The chapter explains the observed changes in terms of a change in the degree of reduction of the surface, and hence in terms of changed composition of the pool of oxygen species at the surface." @default.
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- W1524368657 date "1997-01-01" @default.
- W1524368657 modified "2023-09-27" @default.
- W1524368657 title "Influence of antimony content in the iron antimony oxide catalyst and reaction conditions on the (Amm)Oxidation of propene and propane" @default.
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- W1524368657 doi "https://doi.org/10.1016/s0167-2991(97)81003-8" @default.
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