Investigation of the reaction mechanism of methylpyrazine ammoxidation on vanadia-titania catalyst by FTIR in situ

被引：13
|
作者：
Bondareva, V. M. [1 ]
Andrushkevich, T. V. [1 ]
Paukshtis, E. A. [1 ]
Paukshtis, N. A. [1 ]
Budneva, A. A. [1 ]
Parmon, V. N. [1 ]
机构：
[1] Boreskov Inst Catalysis, Novosibirsk 630090, Russia
来源：
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 2007年 / 269卷 / 1-2期
关键词：
ammoxidation of methylpyrazine; V-Ti-O catalyst; in situ FTIR spectroscopy;
D O I：
10.1016/j.molcata.2007.01.021
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The mechanism of methylpyrazine ammoxidation on a vanadia-titania catalyst has been studied by in situ FTIR spectroscopy. The structure of surface intermediates has been identified and the sequence of their transformation in the temperature range of 150-230 degrees C has been ascertained. The interaction of methylpyrazine with catalyst surface includes a consecutive transformation of coordinatively bound methylpyrazine into oxygenated surface compounds, viz., an aldehyde-like complex and an asymmetrical carboxylate. The main reaction product, amidopyrazine, is formed through the interaction of the surface oxyintermediates with adsorbed ammonia species. (c) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码：240 / 245
页数：6
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