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Mode-specific, semi-volatile chemical composition of particulate matter emissions from a commercial gas turbine aircraft engine

机译：商用燃气涡轮飞机发动机排放的特定于模式的半挥发性化学成分的颗粒物

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We measured and characterized semi-volatile chemical composition of particulate matter (PM) in aircraft engine exhaust plumes in a dedicated aircraft PM emission study (NASA's AAFEX 1 field measurement campaign). Mode-specific organic and sulfate components were observed with a compact time-of-flight aerosol mass spectrometer (C-ToF-AMS). Nitrate components in both the nucleation and soot mode particles were negligible. The organic composition for the nucleation mode particles decreases with Increasing engine power. For the soot mode, organic fraction Initially decreases with increasing engine power but then slightly Increases again above 45% engine thrust, probably due to the increasing contribution from lubrication oil emissions. These results show that an appreciable amount of semi-volatile PM can be generated in the exhaust plumes from a commercial aircraft engine. Thus, volatile PM must be studied as carefully as non-volatile soot emissions to fully address local air quality and human health impacts of aviation.
机译：在一项专门的飞机PM排放研究（NASA的AAFEX 1现场测量活动）中，我们测量并表征了飞机发动机排气羽流中颗粒物质（PM）的半挥发性化学成分。使用紧凑型飞行时间气溶胶质谱仪（C-ToF-AMS）观察到模式特定的有机和硫酸盐成分。成核和烟灰模式颗粒中的硝酸盐成分都可以忽略不计。随着发动机功率的增加，成核模式颗粒的有机组成减少。对于烟灰模式，有机成分最初随着发动机功率的增加而降低，然后在发动机推力超过45％时再次略有增加，这可能是由于润滑油排放量的增加所致。这些结果表明，在商用飞机发动机的废气流中可产生相当数量的半挥发性颗粒物。因此，必须对挥发性PM和非挥发性烟灰的排放进行认真研究，以充分解决当地空气质量和航空对人类健康的影响。

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