NO reduction by C3H6 in excess oxygen over fresh and sulfated Pt- and Rh-based catalysts

Citation
A. Toubeli et al., NO reduction by C3H6 in excess oxygen over fresh and sulfated Pt- and Rh-based catalysts, CATAL LETT, 69(3-4), 2000, pp. 157-164
Citations number
23
Categorie Soggetti
Physical Chemistry/Chemical Physics","Chemical Engineering
Journal title
CATALYSIS LETTERS
ISSN journal
1011372X → ACNP
Volume
69
Issue
3-4
Year of publication
2000
Pages
157 - 164
Database
ISI
SICI code
1011-372X(2000)69:3-4<157:NRBCIE>2.0.ZU;2-Y
Abstract
The selective catalytic reduction (SCR) of NO with C3H6 was studied over th ree noble-metal-based catalysts: 2% Pt/gamma-Al2O3, 2% Rh/gamma-Al2O3 and 1 .5% Rh/TiO2(4% WO3). The SO2 effect on the catalyst activity was examined u sing sulfated samples of the above catalysts and SO2-containing feeds. Temp erature-programmed desorption and oxidation studies were carried out to exa mine the adsorption characteristics of NO and C3H6, respectively, in the ab sence or the presence of SO2. The adsorption data were linked to variations in the NO reduction rates over fresh and sulfated samples. Modification of the support surface as a result of the SO2 presence affects the NO and pro pene sorption characteristics, the NO oxidation and the propene consumption rates.