Role of the redox properties in the SCR of NO by NH3 over V2O5-WO3/TiO2 catalysts

被引：40

作者：

Lietti, L

Forzatti, P

Berti, F

机构：

[1] POLITECN MILAN,DIPARTIMENTO CHIM IND & INGN CHIM G NATTA,I-20133 MILAN,ITALY

[2] ENEL DSR,CTR RIC AMBIENTE & MAT,I-20132 MILAN,ITALY

来源：

CATALYSIS LETTERS | 1996年 / 41卷 / 1-2期

关键词：

NOx reduction; selective catalytic reduction; V2O5-WO3/TiO2; catalysts;

D O I：

10.1007/BF00811709

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 reactivity of ternary V2O5-WO3/TiO2 De-NOx catalysts is investigated by transient and steady-state techniques, and results have been compared with those obtained over binary V2O5/TiO2 samples having the same V2O5 loading. The results indicate that the reactivity of the ternary catalysts in the SCR reaction is higher than that of the vanadia-titania samples, and that at low temperatures the SCR reaction occurs via a redox mechanism that involves at first the participation of the catalyst lattice oxygen and then the reoxidation of the reduced sites by gas-phase oxygen. Accordingly, the higher reactivity of the ternary catalysts has been related to their superior redox properties.

引用

页码：35 / 39

页数：5

共 15 条

[1] REACTIVITY AND PHYSICOCHEMICAL CHARACTERIZATION OF V2O5-WO3/TIO2 DE-NOX CATALYSTS [J].