References

ACP

Atmospheric Chemistry and Physics

ACP

Atmos. Chem. Phys.

1680-7324

Copernicus Publications

Göttingen, Germany

10.5194/acp-13-9141-2013

Secondary organic aerosol formation from gasoline vehicle emissions in a new mobile environmental reaction chamber

Platt

S. M.

¹ El Haddad

¹ Zardini

A. A.

² Clairotte

² Astorga

² Wolf

¹ Slowik

J. G.

¹ Temime-Roussel

³ Marchand

https://orcid.org/0000-0001-9745-492X

³ Ježek

⁴ Drinovec

https://orcid.org/0000-0003-0126-692X

⁴ Močnik

https://orcid.org/0000-0001-6379-2381

⁴ Möhler

⁵ Richter

¹ Barmet

¹ Bianchi

https://orcid.org/0000-0003-2996-3604

¹ Baltensperger

¹ Prévôt

A. S. H.

Laboratory of Atmospheric Chemistry, Paul Scherrer Institute (PSI), Villigen, 5232, Switzerland

Institute for Energy and Transport, Sustainable Transport Unit, European Commission Joint Research Centre 21027 Ispra, Italy

Aix-Marseille Université, CNRS, LCE FRE 3416, 13331, Marseille, France

Aerosol d.o.o., 100 Ljubljana, Slovenia

Institute for Meteorology and Climate Research, Karlsruhe Institute of Technology, 76021 Karlsruhe, Germany

16 09 2013

13 18 9141 9158

2013

This work is licensed under the Creative Commons Attribution 3.0 Unported License. To view a copy of this licence, visit https://creativecommons.org/licenses/by/3.0/

This article is available from https://acp.copernicus.org/articles/13/9141/2013/acp-13-9141-2013.html

The full text article is available as a PDF file from https://acp.copernicus.org/articles/13/9141/2013/acp-13-9141-2013.pdf

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 NO2, JNO2, 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.

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