Positive effect of NOx on the performances of VOx/TiO2-based catalysts in the total oxidation abatement of chlorobenzene

被引：120

作者：

Bertinchamps, F ^{[1
]}

Treinen, M ^{[1
]}

Blangenois, N ^{[1
]}

Mariage, E ^{[1
]}

Gaigneaux, EM ^{[1
]}

机构：

[1] Univ Catholique Louvain, Unite Catalyse & Chim Mat Divises, B-1348 Louvain, Belgium

来源：

JOURNAL OF CATALYSIS | 2005年 / 230卷 / 02期

关键词：

catalytic oxidation; PCDDs/PCDFs; chlorinated VOC; dioxins; chlorobenzene; vanadia/titania; V/W/Ti; V/Mo/Ti; NO/NO2; NOx;

D O I：

10.1016/j.jcat.2005.01.009

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 influence of NO on the performances of VOx/TiO2, VOx-WOx/TiO2, and VOx-MoOx/TiO2 catalysts is investigated in the combustion of chlorobenzene. NO proves to induce an increase in the chlorobenzene conversion. However, this happens only if O-2 is present and is maximized when the catalyst contains W or Mo. The suggested mechanism for the effect is: 1) NO is oxidized to NO2 mainly on WO, and MoOx; 2) afterward, NO2 assists O-2 in the reoxidation step (as described by Mars-van Krevelen) of the VOx phase, thus speeding up the oxidation cycle, which macroscopically corresponds to the increase in chlorobenzene conversion. (c) 2005 Elsevier Inc. All rights reserved.

引用

页码：493 / 498

页数：6

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