Journal article
Speciation and chemical evolution of nitrogen oxides in aircraft exhaust near airports
Environmental science & technology, v 42(6), pp 1884-1891
15 Mar 2008
PMID: 18409608
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Measurements of nitrogen oxides from a variety of commercial aircraft engines as part of the JETS-APEX2 and APEX3 campaigns show that NOx (NOx [triple bond] NO + NO2) is emitted primarily in the form of NO2 at idle thrust and NO at high thrust. A chemical kinetics combustion model reproduces the observed NO2 and NOx trends with engine power and sheds light on the relevant chemical mechanisms. Experimental evidence is presented of rapid conversion of NO to NO2 in the exhaust plume from engines at low thrust. The rapid conversion and the high NO2/NOx emission ratios observed are unrelated to ozone chemistry. NO2 emissions from a CFM56-3B1 engine account for approximately 25% of the NOx emitted below 3000 feet (916 m) and 50% of NOx emitted below 500 feet (153 m) during a standard ICAO (International Civil Aviation Organization) landing-takeoff cycle. Nitrous acid (HONO) accounts for 0.5% to 7% of NOy emissions from aircraft exhaust depending on thrust and engine type. Implications for photochemistry near airports resulting from aircraft emissions are discussed.
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Details
- Title
- Speciation and chemical evolution of nitrogen oxides in aircraft exhaust near airports
- Creators
- Ezra C Wood - Aerodyne ResearchScott C Herndon - Aerodyne ResearchMichael T Timko - Aerodyne ResearchPaul E Yelvington - Aerodyne ResearchRichard C Miake-Lye - Aerodyne Research
- Publication Details
- Environmental science & technology, v 42(6), pp 1884-1891
- Publisher
- American Chemical Society; Washington, DC
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Chemistry
- Web of Science ID
- WOS:000253947700015
- Scopus ID
- 2-s2.0-41849098854
- Other Identifier
- 991020902975904721
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- Web of Science research areas
- Engineering, Environmental
- Environmental Sciences