| Title: | Potential of secondary aerosol formation from Chinese gasoline engine exhaust |
| Author(s): | Du Z; Hu M; Peng J; Guo S; Zheng R; Zheng J; Shang D; Qin Y; Niu H; Li M; Yang Y; Lu S; Wu Y; Shao M; Shuai S; |
| Address: | "State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China. State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China. Electronic address: minhu@pku.edu.cn. State key Laboratory of Automotive Safety and Energy, Department of Automotive Engineering, Tsinghua University, Beijing 100084, China" |
| DOI: | 10.1016/j.jes.2017.02.022 |
| ISSN/ISBN: | 1001-0742 (Print) 1001-0742 (Linking) |
| Abstract: | "Light-duty gasoline vehicles have drawn public attention in China due to their significant primary emissions of particulate matter and volatile organic compounds (VOCs). However, little information on secondary aerosol formation from exhaust for Chinese vehicles and fuel conditions is available. In this study, chamber experiments were conducted to quantify the potential of secondary aerosol formation from the exhaust of a port fuel injection gasoline engine. The engine and fuel used are common in the Chinese market, and the fuel satisfies the China V gasoline fuel standard. Substantial secondary aerosol formation was observed during a 4-5hr simulation, which was estimated to represent more than 10days of equivalent atmospheric photo-oxidation in Beijing. As a consequence, the extreme case secondary organic aerosol (SOA) production was 426+/-85mg/kg-fuel, with high levels of precursors and OH exposure. The low hygroscopicity of the aerosols formed inside the chamber suggests that SOA was the dominant chemical composition. Fourteen percent of SOA measured in the chamber experiments could be explained through the oxidation of speciated single-ring aromatics. Unspeciated precursors, such as intermediate-volatility organic compounds and semi-volatile organic compounds, might be significant for SOA formation from gasoline VOCs. We concluded that reductions of emissions of aerosol precursor gases from vehicles are essential to mediate pollution in China" |
| Keywords: | "Aerosols/*analysis/chemistry Air Pollutants/*analysis/chemistry China *Models, Chemical Vehicle Emissions/*analysis Volatile Organic Compounds/analysis/chemistry Chamber simulation Gasoline engine exhaust Port fuel injection Secondary aerosol formation Se;" |
| Notes: | "MedlineDu, Zhuofei Hu, Min Peng, Jianfei Guo, Song Zheng, Rong Zheng, Jing Shang, Dongjie Qin, Yanhong Niu, He Li, Mengren Yang, Yudong Lu, Sihua Wu, Yusheng Shao, Min Shuai, Shijin eng Netherlands 2018/04/10 J Environ Sci (China). 2018 Apr; 66:348-357. doi: 10.1016/j.jes.2017.02.022. Epub 2017 Apr 20" |
