Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9614903 | Journal of Molecular Catalysis A: Chemical | 2005 | 8 Pages |
Abstract
The selective catalytic reduction (SCR) of NO with C3H8 was studied over unsulfated and pre-sulfated 1% Pt/γ-Al2O3, and 1% Pt-2% Sn/γ-Al2O3 catalysts. Carbon residues deposited were evaluated on all samples, after 12 h of C3H8-NO-O2-SO2 reaction. Pre-sulfated 1% Pt-2% Sn/γ-Al2O3 catalyst showed a high resistance on deactivation by sulfur and on carbon residues deposition. Results are explained on basis of X-ray photoelectron spectra (XPS) showing that tin addition to 1% Pt/γ-Al2O3 resulted in (i) lowering the sulfates generated over the surface of the catalyst; (ii) preventing Pt particles from sintering during sulfation process; and (iii) decrease in the number of sites available on the alumina for carbon residues species to be adsorbed.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Catalysis
Authors
Grisel Corro, J.L.G. Fierro, Ramón Montiel, Fortino Bañuelos,