期刊文献+
共找到1篇文章
< 1 >
每页显示 20 50 100
Potential of secondary aerosol formation from Chinese gasoline engine exhaust
1
作者 Zhuofei Du Min Hu +12 位作者 Jianfei Peng Song Guo Rong Zheng Jing Zheng Dongjie Shang Yanhong Qin He Niu Mengren Li Yudong Yang Sihua Lu Yusheng Wu Min Shao Shijin Shuai 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2018年第4期348-357,共10页
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 aeroso... 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 4–5 hr simulation, which was estimated to represent more than 10 days of equivalent atmospheric photo-oxidation in Beijing. As a consequence, the extreme case secondary organic aerosol(SOA) production was 426 ± 85 mg/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. 展开更多
关键词 port fuel injection Gasoline engine exhaust Secondary aerosol formation Chamber simulation Secondary organic aerosol
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部