Model studies of NOx storage and sulphur deactivation of NOx storage catalysts
Journal article, 2001

The storage of NOx under lean conditions in model NOx storage catalysts as well as the deactivation by sulphur have been studied. We find that NO2 plays an important role in the storage mechanism as an oxidising agent. Two different mechanisms for this are discussed: the formation of surface peroxides and the oxidation of nitrites to nitrates, FTIR studies show that NOx is stored as surface nitrates, The sulphur deactivation is found to be more severe when SO2 is added during the rich phase than when SO2 is added during the lean period. FTIR shows the formation of bulk sulphates both under lean and rich conditions.

NOx storage

storage mechanism

sulphur deactivation

lean-burn

NOx reduction

Author

Erik Fridell

Competence Centre for Catalysis (KCK)

Chalmers, Applied Physics, Chemical Physics

Hans Persson

Competence Centre for Catalysis (KCK)

Chalmers, Applied Physics

Louise Olsson

Competence Centre for Catalysis (KCK)

Department of Chemical Reaction Engineering

Björn Westerberg

Competence Centre for Catalysis (KCK)

Department of Chemical Reaction Engineering

Annika Amberntsson

Chalmers, Applied Physics

Competence Centre for Catalysis (KCK)

Magnus Skoglundh

Competence Centre for Catalysis (KCK)

Department of Applied Surface Chemistry

Topics in Catalysis

1022-5528 (ISSN) 1572-9028 (eISSN)

Vol. 16-17 1-4 133-137

Driving Forces

Sustainable development

Areas of Advance

Nanoscience and Nanotechnology (2010-2017)

Transport

Energy

Materials Science

Subject Categories

Chemical Engineering

Chemical Sciences

More information

Created

10/8/2017