Sulphur dioxide interaction with NOx storage catalysts
Journal article, 1999
The effect of SO2 on the NOx storage capacity and oxidation and reduction activities of a model Pt/Rh/BaO/Al2O3 NOx storage catalyst was investigated. Addition of 2.5, 7.5 or 25 vol. ppm SO2 to a synthetic lean exhaust gas caused deactivation of the NOx storage function, the oxidation activity and the reduction activity of the catalyst. The degree of deactivation of the NOx storage capacity was found to be proportional to the total SO2 dose that the catalyst had been exposed to. SO2 was found to be accumulated in the catalyst as sulphate.
lean burn
catalyst deactivation
NOx reduction
selective catalytic reduction
platinum
rhodium
barium oxide
sulphur dioxide
NOx storage
propene oxidation
Author
Per Engström
Chalmers, Applied Physics
Competence Centre for Catalysis (KCK)
Annika Amberntsson
Chalmers, Applied Physics
Competence Centre for Catalysis (KCK)
Magnus Skoglundh
Department of Applied Surface Chemistry
Competence Centre for Catalysis (KCK)
Erik Fridell
Chalmers, Applied Physics, Chemical Physics
Competence Centre for Catalysis (KCK)
Gudmund Smedler
Applied Catalysis B: Environmental
0926-3373 (ISSN) 1873-3883 (eISSN)
Vol. 22 4 L241-L248Driving Forces
Sustainable development
Areas of Advance
Nanoscience and Nanotechnology
Transport
Energy
Materials Science
Subject Categories
Chemical Process Engineering
Chemical Engineering
Chemical Sciences
DOI
10.1016/S0926-3373(99)00060-0