期刊
CATALYSIS TODAY
卷 66, 期 2-4, 页码 191-197出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/S0920-5861(00)00648-9
关键词
platinum; alcohol oxidation; redox cycle; methyl alpha-D-glucopyranoside
Platinum catalyst deactivation during aqueous alcohol oxidation is discussed, using the selective oxidation of methyl alpha -D-glucopyranoside as an example. The most important causes of platinum deactivation are catalyst over-oxidation and catalyst poisoning. Deactivation by over-oxidation can be reversed by applying a redox-cycle, i.e. cyclic exposure to oxidative and reductive circumstances. A kinetic model for methyl alpha -D-glucopyranoside oxidation, platinum deactivation, and reactivation, based on electrochemistry is presented and implemented into a three-phase stirred slurry reactor model, showing the advantages of applying redox cycles. (C) 2001 Elsevier Science B.V. All rights reserved.
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