Ammoxidation of methylpyrazine over vanadium-titanium catalysts modified by alkali additives

被引：0
|
作者：
V. M. Bondareva
T. V. Andrushkevich
O. B. Lapina
A. A. Vlasov
L. S. Dovlitova
E. B. Burgina
机构：
[1] Boreskov Institute of Catalysis,
来源：
Reaction Kinetics and Catalysis Letters | 2003年 / 78卷
关键词：
sodium and potassium additives; methylpyrazine ammoxidation; Vanadium-titanium modified catalysts;
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学科分类号：
摘要：
Vanadium-titanium catalysts modified with sodium or potassium additives (1-15 wt.% of Me2O) have been studied in methylpyrazine ammoxidation. Introduction of the additives results in a decrease in the activity and selectivity of the catalysts due to formation of low-active phase - bronzes (MeV6O15) and vanadates (α-NaVO3, KVO3 and K3V5O14). The active sites of the modified samples, similar to those in the V-Ti-O catalyst, are found to be V5+ cations strongly bound to TiO2 and located in a significantly distorted octahedral oxygen environment.
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页码：355 / 363
页数：8
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