Secondary organic aerosol formation from gasoline vehicle emissions in a new mobile environmental reaction chamber.
In: Atmospheric Chemistry & Physics, Jg. 13 (2013-09-15), Heft 18, S. 9141-9158
Online
academicJournal
Zugriff:
We present a new mobile environmental reaction chamber for the simulation of the atmospheric aging of different emission sources without limitation from the instruments or facilities available at any single site. Photochemistry is simulated using a set of 40 UV lights (total power 4 KW). Characterisation of the emission spectrum of these lights shows that atmospheric aging of emissions may be simulated over a range of temperatures (-7 to 25 °C). A photolysis rate of NO 2 , JNO 2 , of (8.0±0.7)×10 -3 s -1 was determined at 25 °C. We demonstrate the utility of this new system by presenting results on the aging (OH = 12×106 cm -3 h) of emissions from a modern (Euro 5) gasoline car operated during a driving cycle (New European Driving Cycle, NEDC) on a chassis dynamometer in a vehicle test cell. Emissions from the entire NEDC were sampled and aged in the chamber. Total organic aerosol (OA; primary organic aerosol (POA) emission + secondary organic aerosol (SOA) formation) was (369.8- 397.5)10 -3 g kg -1 fuel, or (13.2-15.4)×10 -3 g km -1 , after aging, with aged OA/POA in the range 9-15. A thorough investigation of the composition of the gas phase emissions suggests that the observed SOA is from previously unconsidered precursors and processes. This large enhancement in particulate matter mass from gasoline vehicle aerosol emissions due to SOA formation, if it occurs across a wider range of gasoline vehicles, would have significant implications for our understanding of the contribution of on-road gasoline vehicles to ambient aerosols. [ABSTRACT FROM AUTHOR]
Copyright of Atmospheric Chemistry & Physics is the property of Copernicus Gesellschaft mbH and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Titel: |
Secondary organic aerosol formation from gasoline vehicle emissions in a new mobile environmental reaction chamber.
|
---|---|
Autor/in / Beteiligte Person: | Platt, S. M. ; Haddad, I. El ; Zardini, A. A. ; Clairotte, M. ; Astorga, C. ; Wolf, R. ; Slowik, J. G. ; Temime-Roussel, B. ; Marchand, N. ; Ježek, I. ; Drinovec, L. ; Močnik, G. ; Möhler, O. ; Richter, R. ; Barmet, P. ; Bianchi, F. ; Baltensperger, U. ; Prévôt, A. S. H. |
Link: | |
Zeitschrift: | Atmospheric Chemistry & Physics, Jg. 13 (2013-09-15), Heft 18, S. 9141-9158 |
Veröffentlichung: | 2013 |
Medientyp: | academicJournal |
ISSN: | 1680-7316 (print) |
DOI: | 10.5194/acp-13-9141-2013 |
Schlagwort: |
|
Sonstiges: |
|