Catalysis Letters

, Volume 125, Issue 3, pp 229–235

Spatially-Resolved Calorimetry: Using IR Thermography to Measure Temperature and Trapped NOX Distributions on a NOX Adsorber Catalyst


  • Khurram Aftab
    • Department of Chemical EngineeringUniversity of Waterloo
  • Jasdeep Mandur
    • Department of Chemical EngineeringUniversity of Waterloo
  • Hector Budman
    • Department of Chemical EngineeringUniversity of Waterloo
  • Neal W. Currier
    • Cummins Inc., MC 50321
  • Aleksey Yezerets
    • Cummins Inc., MC 50321
    • Department of Chemical EngineeringUniversity of Waterloo

DOI: 10.1007/s10562-008-9578-2

Cite this article as:
Aftab, K., Mandur, J., Budman, H. et al. Catal Lett (2008) 125: 229. doi:10.1007/s10562-008-9578-2


Spatial- and time-resolved temperature distributions over a Pt/Ba/Al2O3 model NOX storage/reduction (NSR) catalyst were measured using infra-red thermography. The heat generated during regeneration was correlated to surface nitrate reduction, thereby revealing the concentration of surface nitrates at specific locations along the catalyst. The results demonstrate that there is more nitrate formation at upstream positions relative to downstream, or from front to back of the catalyst, with short trapping times. However, as more NOX was trapped on the catalyst during longer trapping times, it was found that the largest amount of NOX was trapped slightly downstream of the inlet, evolving to a local maximum in amount trapped. Applying infrared (IR) thermography to this system resulted in a spatially resolved calorimetry method via the correlation of temperature to the distribution of sorbed nitrate species along the catalyst.


NOX storageNOX reductionLean NOX trapsInfra-red thermographyVehicle emissionsSpatially resolved calorimetry

Copyright information

© Springer Science+Business Media, LLC 2008