Investigations of sulphur deactivation of NOx storage catalysts: influence of sulphur carrier and exposure conditions
Journal article, 2002

The influence of SO2, H2S and COS in low concentrations on the deactivation of PURh/BaO/Al2O3 NOx storage catalysts was investigated. Different samples of the catalyst were exposed to synthetic gas mixtures mimicking lean/rich engine cycling in a mixed lean application at 400degreesC. The lean gas mixture contained 8 vol.% O2, 500 vol-ppm C3H6 and 400 vol-ppm NO balanced to 100 vol.% with Ar. The rich excursions were performed by switching off the oxygen supply. Sulphur, 25 vol-ppm of either SO2, H2S or COS, was added to the gas flow either during the lean, the rich or both periods. This procedure aimed at investigating the influence of the exposure conditions and therefore the lean and rich periods were kept equally long (5 min). In addition, thermodynamical calculations for the prevailing conditions were performed.

storage catalysts

platinum

COS

sulphur deactivation

NOx

H2S

rhodium

sulphur carrier

Author

Annika Amberntsson

Chalmers, Applied Physics

Competence Centre for Catalysis (KCK)

Magnus Skoglundh

Competence Centre for Catalysis (KCK)

Department of Applied Surface Chemistry

Martin Jonsson

Competence Centre for Catalysis (KCK)

Chalmers, Applied Physics

Erik Fridell

Competence Centre for Catalysis (KCK)

Chalmers, Applied Physics

Catalysis Today

0920-5861 (ISSN)

Vol. 73 3-4 279-286

Driving Forces

Sustainable development

Areas of Advance

Nanoscience and Nanotechnology (2010-2017)

Transport

Energy

Materials Science

Subject Categories

Physical Chemistry

Chemical Engineering

Chemical Sciences

DOI

10.1016/S0920-5861(02)00011-1

More information

Created

10/8/2017