Measurements of Nitrous Acid in Commercial Aircraft Exhaust at the Alternative Aviation Fuel Experiment

详细信息    查看全文

• 作者：Ben H. Lee ; Gregory W. Santoni ; Ezra C. Wood ; Scott C. Herndon ; Richard C. Miake-Lye ; Mark S. Zahniser ; Steven C. Wofsy ; J. William Munger
• 刊名：Environmental Science & Technology
• 出版年：2011
• 出版时间：September 15, 2011
• 年：2011
• 卷：45
• 期：18
• 页码：7648-7654
• 全文大小：855K
• 年卷期：v.45,no.18(September 15, 2011)
• ISSN：1520-5851

文摘

The Alternative Aviation Fuel Experiment (AAFEX), conducted in January of 2009 in Palmdale, California, quantified aerosol and gaseous emissions from a DC-8 aircraft equipped with CFM56-2C1 engines using both traditional and synthetic fuels. This study examines the emissions of nitrous acid (HONO) and nitrogen oxides (NO_x = NO + NO₂) measured 145 m behind the grounded aircraft. The fuel-based emission index (EI) for HONO increases approximately 6-fold from idle to takeoff conditions but plateaus between 65 and 100% of maximum rated engine thrust, while the EI for NO_x increases continuously. At high engine power, NO_x EI is greater when combusting traditional (JP-8) rather than Fischer鈥揟ropsch fuels, while HONO exhibits the opposite trend. Additionally, hydrogen peroxide (H₂O₂) was identified in exhaust plumes emitted only during engine idle. Chemical reactions responsible for emissions and comparison to previous measurement studies are discussed.