The kinetics of vapour-phase ammoxidation of 2,6-dichlorotoluene over VPO catalyst

被引：24

作者：

Dropka, N. ^{[1
]}

Kalevaru, V. Narayana ^{[1
]}

Martin, A. ^{[1
]}

Linke, D. ^{[1
]}

Luecke, B. ^{[1
]}

机构：

[1] Inst Angew Chem Berlin Adlershof eV, D-12489 Berlin, Germany

来源：

JOURNAL OF CATALYSIS | 2006年 / 240卷 / 01期

关键词：

promoted VPO catalyst; ammoxidation; 2,6-dichlorotoluene; kinetic modelling; reaction scheme; mini-plant experiments; simulation and validation;

D O I：

10.1016/j.jcat.2006.02.025

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 kinetics of the vapour-phase ammoxidation of 2,6-dichlorotoluene (DCT) to 2,6-dichlorobenzonitrile (DCBN) over a vanadium phosphorus oxide (VPO) catalyst was investigated. In this paper, the main focus is on developing a mathematical model to describe the reaction kinetics of ammoxidation of DCT in a nonisothermal fixed-bed lab-scale reactor. The effect on catalytic performance of various operating parameters, including reaction temperature and contact time, as well as of DCT, NH3, O-2, and H2O partial pressures, were studied. The experimental kinetic data obtained under nonisothermal conditions were correlated by the rate equations based on the Langmuir-Hinshelwood mechanism. All of the possible routes of reaction scheme were considered. Finally, the derived kinetic model was validated by comparing experimental results obtained in up-scaled experiments from a mini-plant with that of simulated results. The simulated values of various parameters, including the conversions of DCT and O-2 and even the yields of DCBN and COx, agree well with those of experimentally measured values. (c) 2006 Elsevier Inc. All rights reserved.

引用

页码：8 / 17

页数：10

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