Effects of PbCl2 on selective catalytic reduction of NO with NH3 over vanadia-based catalysts.
J Hazard Mater
; 274: 270-8, 2014 Jun 15.
Article
em En
| MEDLINE
| ID: mdl-24794983
ABSTRACT
The effects of PbCl2 on the selective catalytic reduction of NO with NH3 over vanadia-based catalysts were studied with BET, XRD, SEM, XPS, NH3-TPD, NH3 chemisorption, FT-IR and catalytic activity measurements. The results showed that PbCl2 deactivated the catalysts to a very high extent. The doping of PbCl2 could decrease the surface acidity, especially that of Brønsted acid sites. XPS characterization reveals that the presence of PbCl2 resulted in the transformation of V(5+) into V(4+), which decreased the reducibility of vanadia species. Based on the analysis of physical and chemical properties of the catalysts, the PbCl2-poisoning mechanism model of the vanadia-based SCR catalysts was proposed.
Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Compostos de Vanádio
/
Amônia
/
Chumbo
/
Óxido Nítrico
Idioma:
En
Ano de publicação:
2014
Tipo de documento:
Article