Influence of a catalytic stripper on the response of real time aerosol instruments to diesel exhaust aerosol

D. B. Kittelson, W. F. Watts, J. C. Savstrom, J. P. Johnson

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The objective of this study was to evaluate the response of a suite of portable, real-time aerosol instruments to Diesel exhaust aerosol with and without a catalytic stripper (CS) to determine the change in response as a function of particle size and volatility. The response of the photoemission aerosol sensor (PAS) was strongly influenced by the physical and chemical nature of Diesel aerosol. The presence of a large, predominantly volatile nuclei mode, and/or the presence of volatile material on the surface of the solid carbonaceous agglomerates in the accumulation mode suppressed the PAS response. Removal of the volatile material by passage of the aerosol through the CS enhanced the response, and improved correlations between the PAS, the diffusion charger (DC) and the scanning mobility particle sizer (SMPS). Data on aerosol size distributions, number, volume, and surface area concentrations with and without the CS in the sample stream are reported.

Original languageEnglish (US)
Pages (from-to)1089-1107
Number of pages19
JournalJournal of Aerosol Science
Issue number9
StatePublished - Sep 2005

Bibliographical note

Funding Information:
This work was supported by the National Institute for Occupational Safety and Health, Pittsburgh Research Laboratory. We would like to thank Johnson Matthey for providing the catalyst components of the catalytic stripper and the Engine Manufacturers Association for supporting the C-12 engine and test stand.

Copyright 2019 Elsevier B.V., All rights reserved.


  • Aerosol
  • Catalytic stripper
  • Diesel
  • Nanoparticles
  • Nuclei
  • Surface area


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