 |
| Titel |
Tempo-spatial variation of emission inventories of speciated volatile organic compounds from on-road vehicles in China |
| VerfasserIn |
H. Cai, S. D. Xie |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1680-7316
|
| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 9, no. 18 ; Nr. 9, no. 18 (2009-09-22), S.6983-7002 |
| Datensatznummer |
250007643
|
| Publikation (Nr.) |
 copernicus.org/acp-9-6983-2009.pdf |
|
|
|
|
|
| Zusammenfassung |
Emission inventories of sixty-seven speciated non-methane volatile organic
compounds (NMVOC) from on-road vehicles in China were estimated for the
period of 1980–2005, using seven NMVOC emission profiles, which were
summarized based on local and international measurements from published
literatures dealing with specific vehicle categories running under particular
modes.
Results show an exponential growth trend of China's historical emissions of
alkanes, alkenes, alkines, aromatics and carbonyls during the period of
1980–2005, increasing from 63.9, 39.3, 6.9, 36.8 and 24.1 thousand tons,
respectively, in 1980 to 2778.2, 1244.5, 178.7, 1351.7 and 406.0 thousand
tons, respectively, in 2005, which coincided well with China's economic
growth. Emission inventories of alkenes, aromatics and carbonyls were gridded
at a high resolution of 40 km×40 km for air quality simulation and
health risk evaluation, using the geographic information system (GIS)
methodology. Spatial distribution of speciated NMVOC emissions shows a clear
difference in emission densities between developed eastern and relatively
underdeveloped western and inland China. Besides, the appearance and
expansion of high-emission areas was another notable characteristic of
spatial distribution of speciated NMVOC emissions during the period.
Emission contributions of vehicle categories to speciated NMVOC groups showed
annual variation, due to the variance in the provincial emissions and in the
relative fractions of the seven emission profiles adopted at the provincial
level. Highly reactive and toxic compounds accounted for high proportions of
emissions of speciated NMVOC groups. The most abundant compounds were
isopentane, pentane and butane from alkanes; ethene, propene,
2-methyl-2-butene and ethyne from alkenes and alkines; benzene, toluene,
ethylbenzene, o-xylene, and m,p-xylene (BTEX) and 1,2,4-trimethylbenzene from
aromatics and formaldehyde, acetaldehyde, benzaldehyde and acetone from
carbonyls. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|