Sulfur Deactivation of Pt/SiO2, Pt/BaO/Al 2O3 and BaO/Al2O3 NOx Storage Catalysts: Influence of SO2 Exposure Conditio
Journal article, 2005

Flow reactor experiments were performed to study the effect Of SO2 + O-2 and SO2 + H-2 exposures on the NOx storage performance of Pt/BaO/Al2O3 and BaO/Al2O3 catalysts. In addition, Pt/SiO2 samples were used to study the interaction between Pt and SO2 under the two exposure conditions. For BaO/Al2O3 the two SO2 exposure conditions caused similar deactivation of the NO, storage capacity, whereas for Pt/BaO/Al2O3 the decline in the NOx storage capacity was faster during the SO2 + H-2 exposure than for SO2 + O-2 exposure. The presence of Pt enhances the adsorption Of SO2 for both SO2 exposure conditions. Quantitative analysis of sulfur showed that exposure to SO2 + O-2 caused higher accumulation of sulfur in Pt/BaO/Al2O3 samples in comparison with SO2 + H-2 exposure. Thus there is no correlation between the total amount of adsorbed sulfur in the samples and the reduction of the NOx storage capacity, probably because of the adsorption of sulfur on sites not necessarily important for the NOx storage process.

REDUCTION CATALYST

EXHAUST CATALYSTS

NITROGEN-OXIDES

ADSORPTION

TRAP CATALYSTS

NOx STORAGE

3-WAY CATALYST

NOBLE-METAL

REGENERATION

FT-IR

Author

JAZAER DAWODY

Chalmers, Applied Physics, Chemical Physics

Competence Centre for Catalysis (KCK)

Magnus Skoglundh

Competence Centre for Catalysis (KCK)

Chalmers, Chemical and Biological Engineering

Louise Olsson

Competence Centre for Catalysis (KCK)

Chalmers, Chemical and Biological Engineering, Chemical Reaction Engineering

Erik Fridell

Competence Centre for Catalysis (KCK)

Chalmers, Applied Physics, Chemical Physics

Journal of Catalysis

0021-9517 (ISSN) 1090-2694 (eISSN)

Vol. 234 1 206-218

Driving Forces

Sustainable development

Areas of Advance

Nanoscience and Nanotechnology (2010-2017)

Transport

Energy

Materials Science

Subject Categories

Physical Sciences

Chemical Engineering

DOI

10.1016/j.jcat.2005.05.017

More information

Created

10/7/2017