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| Titel |
VOC species and emission inventory from vehicles and their SOA formation potentials estimation in Shanghai, China |
| VerfasserIn |
C. Huang, H. L. Wang, L. Li, Q. Wang, Q. Lu, J. A. Gouw, M. Zhou, S. A. Jing, J. Lu, C. H. Chen |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 15, no. 19 ; Nr. 15, no. 19 (2015-10-06), S.11081-11096 |
| Datensatznummer |
250120078
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| Publikation (Nr.) |
 copernicus.org/acp-15-11081-2015.pdf |
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| Zusammenfassung |
| Volatile organic compound (VOC) species from vehicle exhausts and gas evaporation were investigated by chassis dynamometer and
on-road measurements of nine gasoline vehicles, seven diesel vehicles, five
motorcycles, and four gas evaporation samples. The secondary organic aerosol
(SOA) mass yields of gasoline, diesel, motorcycle exhausts, and gas
evaporation were estimated based on the mixing ratio of measured C2–C12 VOC
species and inferred carbon number distributions. High aromatic contents
were measured in gasoline exhausts and contributed comparatively more SOA yield. A vehicular emission inventory was compiled based on a local
survey of on-road traffic in Shanghai and real-world measurements of vehicle
emission factors from previous studies in the cities of China. The
inventory-based vehicular organic aerosol (OA) productions to total CO
emissions were compared with the observed OA to CO concentrations (ΔOA / ΔCO) in the urban atmosphere. The results indicate that vehicles
dominate the primary organic aerosol (POA) emissions and OA production,
which contributed about 40 and 60 % of OA mass in the urban atmosphere
of Shanghai. Diesel vehicles, which accounted for less than 20 % of
vehicle kilometers of travel (VKT), contribute more than 90 % of vehicular
POA emissions and 80–90 % of OA mass derived by vehicles in urban
Shanghai. Gasoline exhaust could be an important source of SOA formation.
Tightening the limit of aromatic content in gasoline fuel will be helpful to
reduce its SOA contribution. Intermediate-volatile organic compounds (IVOCs)
in vehicle exhausts greatly contribute to SOA formation in the urban
atmosphere of China. However, more experiments need to be conducted to
determine the contributions of IVOCs to OA pollution in China. |
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