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Korhonen, Kimmo; Kristensen, Thomas Bjerring; Falk, John; Malmborg, Vilhelm B.; Eriksson, Axel; Gren, Louise; Novakovic, Maja; Shamun, Sam; Karjalainen, Panu; Markkula, Lassi; Pagels, Joakim; Svenningsson, Birgitta; Tunér, Martin; Komppula, Mika; Laaksonen, Ari; Virtanen, Annele

Particle emissions from a modern heavy-duty diesel engine as ice nuclei in immersion freezing mode: a laboratory study on fossil and renewable fuels

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  • Media type: E-Article
  • Title: Particle emissions from a modern heavy-duty diesel engine as ice nuclei in immersion freezing mode: a laboratory study on fossil and renewable fuels
  • Contributor: Korhonen, Kimmo; Kristensen, Thomas Bjerring; Falk, John; Malmborg, Vilhelm B.; Eriksson, Axel; Gren, Louise; Novakovic, Maja; Shamun, Sam; Karjalainen, Panu; Markkula, Lassi; Pagels, Joakim; Svenningsson, Birgitta; Tunér, Martin; Komppula, Mika; Laaksonen, Ari; Virtanen, Annele
  • Published: Copernicus GmbH, 2022
  • Published in: Atmospheric Chemistry and Physics, 22 (2022) 3, Seite 1615-1631
  • Language: English
  • DOI: 10.5194/acp-22-1615-2022
  • ISSN: 1680-7324
  • Keywords: Atmospheric Science
  • Origination:
  • Footnote:
  • Description: Abstract. We studied ice-nucleating abilities of particulateemissions from a modern heavy-duty diesel engine using three different typesof fuel. The polydisperse particle emissions were sampled during engineoperation and introduced to a continuous-flow diffusion chamber (CFDC)instrument at a constant relative humidity RHwater=110 %, whilethe temperature was ramped between −43 and −32 ∘C (T scan). Thetested fuels were EN 590 compliant low-sulfur fossil diesel, hydrotreatedvegetable oil (HVO), and rapeseed methyl ester (RME); all were tested withoutblending. Sampling was carried out at different stages in the engine exhaustaftertreatment system, with and without simulated atmospheric processingusing an oxidation flow reactor. In addition to ice nucleation experiments,we used supportive instrumentation to characterize the emitted particles fortheir physicochemical properties and presented six parameters. We found thatthe studied emissions contained no significant concentrations of ice-nucleating particles likely to be of atmospheric relevance. The substitutionof fossil diesel with renewable fuels, using different emissionaftertreatment systems such as a diesel oxidation catalyst, andphotochemical aging of total exhaust had only minor effect on theirice-nucleating abilities.
  • Access State: Open Access