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| Titel |
Chemical composition and photochemical reactivity of exhaust from aircraft turbine engines |
| VerfasserIn |
C. W. Spicer, M. W. Holdren, R. M. Riggin, T. F. Lyon |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 12, no. 10/11 ; Nr. 12, no. 10/11, S.944-955 |
| Datensatznummer |
250010331
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| Publikation (Nr.) |
 copernicus.org/angeo-12-944-1994.pdf |
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| Zusammenfassung |
| Assessment of the environmental impact of
aircraft emissions is required by planners and policy makers. Seveal areas of
concern are: 1. exposure of airport workers and urban residents to toxic
chemicals emitted when the engines operate at low power (idle and taxi) on the
ground; 2. contributions to urban photochemical air pollution of aircraft
volatile organic and nitrogen oxides emissions from operations around airports;
and 3. emissions of nitrogen oxides and particles during high-altitude
operation. The environmental impact of chemicals emitted from jet aircraft
turbine engines has not been firmly established due to lack of data regarding
emission rates and identities of the compounds emitted. This paper describes an
experimental study of two different aircraft turbine engines designed to
determine detailed organic emissions, as well as emissions of inorganic gases.
Emissions were measured at several engine power settings. Measurements were made
of detailed organic composition from C1 through C17, CO,
CO2, NO, NOx, and polycyclic aromatic hydrocarbons.
Measurements were made using a multi-port sampling pro be positioned directly
behind the engine in the exhaust exit plane. The emission measurements have been
used to determine the organic distribution by carbon number and the distribution
by compound class at each engine power level. The sum of the organic species was
compared with an independent measurement of total organic carbon to assess the
carbon mass balance. A portion of the exhaust was captured and irradiated in
outdoor smog chambers to assess the photochemical reactivity of the emissions
with respect to ozone formation. The reactivity of emissions from the two
engines was apportioned by chemical compound class. |
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