Intermediate Volatility Organic Compound Emissions from On-Road Diesel Vehicles: Chemical Composition, Emission Factors, and Estimated Secondary Organic Aerosol Production

Environmental Science & Technology
Yunliang ZhaoAllen L Robinson

Abstract

Emissions of intermediate-volatility organic compounds (IVOCs) from five on-road diesel vehicles and one off-road diesel engine were characterized during dynamometer testing. The testing evaluated the effects of driving cycles, fuel composition and exhaust aftertreatment devices. On average, more than 90% of the IVOC emissions were not identified on a molecular basis, instead appearing as an unresolved complex mixture (UCM) during gas-chromatography mass-spectrometry analysis. Fuel-based emissions factors (EFs) of total IVOCs (speciated + unspeciated) depend strongly on aftertreatment technology and driving cycle. Total-IVOC emissions from vehicles equipped with catalyzed diesel particulate filters (DPF) are substantially lower (factor of 7 to 28, depending on driving cycle) than from vehicles without any exhaust aftertreatment. Total-IVOC emissions from creep and idle operations are substantially higher than emissions from high-speed operations. Although the magnitude of the total-IVOC emissions can vary widely, there is little variation in the IVOC composition across the set of tests. The new emissions data are combined with published yield data to investigate secondary organic aerosol (SOA) formation. SOA production from uns...Continue Reading

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Citations

Oct 16, 2015·Environmental Science & Technology·Eben S CrossJesse H Kroll
Mar 30, 2016·Environmental Science & Technology·Yunliang ZhaoAllen L Robinson
Oct 21, 2016·Environmental Science & Technology·Xiang LiAlbert A Presto
Jan 11, 2017·Environmental Science & Technology·Shantanu H JatharDelphine K Farmer
Dec 22, 2016·Environmental Science & Technology·Drew R GentnerAllen L Robinson
Nov 14, 2020·The Science of the Total Environment·Liqing WuXuemei Wang
Jun 18, 2021·The Science of the Total Environment·Jianyi TangDandan Huang
May 31, 2018·Environmental Science & Technology·Provat K SahaAndrew P Grieshop
Aug 16, 2021·Environmental Monitoring and Assessment·Asif IqbalMizanur Rahman
Aug 21, 2021·Journal of Environmental Sciences (China)·Xianbao ShenKebin He
Oct 29, 2020·Environmental Science & Technology·Yuji FujitaniJohn G Watson
Aug 22, 2017·Environmental Science & Technology·Beth FriedmanDelphine K Farmer
Dec 12, 2017·Environmental Science & Technology·Hugh Z LiAlbert A Presto

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