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Time-resolved characterization of primary particle emissions and secondary particle formation from a modern gasoline passenger car

Karjalainen, Panu; Timonen, Hilkka; Saukko, Erkka; Kuuluvainen, Heino; Saarikoski, Sanna; Aakko-Saksa, Pivi; Murtonen, Timo; Bloss, Matthew; Dal Maso, Miikka and Simonen, Pauli, et al. (2016) In Atmospheric Chemistry and Physics 16(13). p.8559-8570
Abstract

Changes in vehicle emission reduction technologies significantly affect traffic-related emissions in urban areas. In many densely populated areas the amount of traffic is increasing, keeping the emission level high or even increasing. To understand the health effects of traffic-related emissions, both primary (direct) particulate emission and secondary particle formation (from gaseous precursors in the exhaust emissions) need to be characterized. In this study, we used a comprehensive set of measurements to characterize both primary and secondary particulate emissions of a Euro 5 level gasoline passenger car. Our aerosol particle study covers the whole process chain in emission formation, from the tailpipe to the atmosphere, and also... (More)

Changes in vehicle emission reduction technologies significantly affect traffic-related emissions in urban areas. In many densely populated areas the amount of traffic is increasing, keeping the emission level high or even increasing. To understand the health effects of traffic-related emissions, both primary (direct) particulate emission and secondary particle formation (from gaseous precursors in the exhaust emissions) need to be characterized. In this study, we used a comprehensive set of measurements to characterize both primary and secondary particulate emissions of a Euro 5 level gasoline passenger car. Our aerosol particle study covers the whole process chain in emission formation, from the tailpipe to the atmosphere, and also takes into account differences in driving patterns. We observed that, in mass terms, the amount of secondary particles was 13 times higher than the amount of primary particles. The formation, composition, number and mass of secondary particles was significantly affected by driving patterns and engine conditions. The highest gaseous and particulate emissions were observed at the beginning of the test cycle when the performance of the engine and the catalyst was below optimal. The key parameter for secondary particle formation was the amount of gaseous hydrocarbons in primary emissions; however, also the primary particle population had an influence.

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published
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Atmospheric Chemistry and Physics
volume
16
issue
13
pages
12 pages
publisher
Copernicus Gesellschaft Mbh
external identifiers
  • scopus:84979059414
  • wos:000381091400032
ISSN
1680-7316
DOI
10.5194/acp-16-8559-2016
language
English
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yes
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1efc744a-b2e3-4b0e-86c5-07a529306178
date added to LUP
2017-01-12 12:37:14
date last changed
2017-11-16 10:41:39
@article{1efc744a-b2e3-4b0e-86c5-07a529306178,
  abstract     = {<p>Changes in vehicle emission reduction technologies significantly affect traffic-related emissions in urban areas. In many densely populated areas the amount of traffic is increasing, keeping the emission level high or even increasing. To understand the health effects of traffic-related emissions, both primary (direct) particulate emission and secondary particle formation (from gaseous precursors in the exhaust emissions) need to be characterized. In this study, we used a comprehensive set of measurements to characterize both primary and secondary particulate emissions of a Euro 5 level gasoline passenger car. Our aerosol particle study covers the whole process chain in emission formation, from the tailpipe to the atmosphere, and also takes into account differences in driving patterns. We observed that, in mass terms, the amount of secondary particles was 13 times higher than the amount of primary particles. The formation, composition, number and mass of secondary particles was significantly affected by driving patterns and engine conditions. The highest gaseous and particulate emissions were observed at the beginning of the test cycle when the performance of the engine and the catalyst was below optimal. The key parameter for secondary particle formation was the amount of gaseous hydrocarbons in primary emissions; however, also the primary particle population had an influence.</p>},
  author       = {Karjalainen, Panu and Timonen, Hilkka and Saukko, Erkka and Kuuluvainen, Heino and Saarikoski, Sanna and Aakko-Saksa, Pivi and Murtonen, Timo and Bloss, Matthew and Dal Maso, Miikka and Simonen, Pauli and Ahlberg, Erik and Svenningsson, Birgitta and Brune, William Henry and Hillamo, Risto and Keskinen, Jorma and Rönkkö, Topi},
  issn         = {1680-7316},
  language     = {eng},
  month        = {07},
  number       = {13},
  pages        = {8559--8570},
  publisher    = {Copernicus Gesellschaft Mbh},
  series       = {Atmospheric Chemistry and Physics},
  title        = {Time-resolved characterization of primary particle emissions and secondary particle formation from a modern gasoline passenger car},
  url          = {http://dx.doi.org/10.5194/acp-16-8559-2016},
  volume       = {16},
  year         = {2016},
}