A miniature catalytic stripper for particles less than 23nanometers

Jacob Swanson, David Kittelson, Barouch Giechaskiel, Alexander Bergmann, Martyn Twigg

Research output: Contribution to journalConference articleResearchpeer-review

Abstract

The European Emissions Stage 5b standard for diesel passenger cars regulates particulate matter to 0.0045 g/km and non-volatile part/km greater than 23 nm size to 6.0×1011 as determined by the PMP procedure that uses a heated evaporation tube to remove semi-volatile material. Measurement artifacts associated with the evaporation tube technique prevents reliable extension of the method to a lower size range. Catalytic stripper (CS) technology removes possible sources of these artifacts by effectively removing all hydrocarbons and sulfuric acid in the gas phase in order to avoid any chemical reactions or re-nucleation that may cause measurement complications. The performance of a miniature CS was evaluated and experimental results showed solid particle penetration was 50% at 10.5 nm. The sulfate storage capacity integrated into the CS enabled it to chemically remove sulfuric acid vapor rather than rely on dilution to prevent nucleation. Sulfuric acid re-nucleation was not observed until the challenge concentration was higher than 10 mg/m 3. Additionally, the CS fully removed monodisperse tetracontane particles as large as 220 nm at a concentration of 10,000 part/cm3. A prototype CS VPR was constructed using the miniature CS and preliminary measurements from a field study are reported.

Original languageEnglish
Pages (from-to)542-551
JournalSAE International Journal of Fuels and Lubricants
Volume6
Issue number2
DOIs
Publication statusPublished - 2013
Externally publishedYes
EventSAE 2013 World Congress and Exhibition - Detroit, MI, United States
Duration: 16 Apr 201318 Apr 2013

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Sulfuric acid
Nucleation
Evaporation
Passenger cars
Dilution
Chemical reactions
Hydrocarbons
Vapors
Gases

ASJC Scopus subject areas

  • Automotive Engineering
  • Safety, Risk, Reliability and Quality
  • Pollution
  • Industrial and Manufacturing Engineering

Cite this

A miniature catalytic stripper for particles less than 23nanometers. / Swanson, Jacob; Kittelson, David; Giechaskiel, Barouch; Bergmann, Alexander; Twigg, Martyn.

In: SAE International Journal of Fuels and Lubricants, Vol. 6, No. 2, 2013, p. 542-551.

Research output: Contribution to journalConference articleResearchpeer-review

Swanson, Jacob ; Kittelson, David ; Giechaskiel, Barouch ; Bergmann, Alexander ; Twigg, Martyn. / A miniature catalytic stripper for particles less than 23nanometers. In: SAE International Journal of Fuels and Lubricants. 2013 ; Vol. 6, No. 2. pp. 542-551.
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