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Important role of aromatic hydrocarbons in SOA formation from unburned gasoline vapor
Chen, Tianzeng; Liu, Yongchun; Liu, Changgeng; Liu, Jun; Chu, Biwu; He, Hong
2019-03-01
Source PublicationATMOSPHERIC ENVIRONMENT
ISSN1352-2310
Volume201Pages:101-109
AbstractGasoline emissions are the largest source of urban atmospheric VOCs, which are critical precursors of ozone (O-3) and secondary organic aerosol (SOA). Besides vehicle exhaust, emissions from gasoline evaporation also have a potentially significant effect on SOA formation. However, there are still few studies on the relationship between gasoline vapor composition and SOA formation, especially for gasoline in China. In this study, SOA formation from three unburned gasoline vapors were investigated in a 30 m(3) indoor smog chamber. The experimental results showed that with the increase of aromatic content (especially toluene and C2 benzenes) in gasoline from 23% to 50%, the SOA yield was significantly enhanced by a factor of 4.0-6.7. This phenomenon might be related to the higher amounts of intermediate volatility organic compounds (IVOCs) and semi-volatile organic compounds (SVOCs) formed, which promoted the gas-particle partitioning and SOA formation. Additionally, the synergistic effects between precursors in the mixtures might also be a key factor, which could be supported by the higher SOA yield accompanied by a higher ratio of toluene/benzene. Meanwhile, there were more oxygenated organic aerosols (OOA) observed when using high-aromatic gasoline. This work will help in understanding the effect of aromatic content or gasoline quality on the SOA formation from gasoline evaporation emissions, and in providing the scientific basis for taking corresponding control measures to relieve haze events in China.
Department水污染控制实验室
KeywordSecondary organic aerosol Gasoline vapor Aromatic content Semi-volatile organic compounds
Document Type期刊论文
Identifierhttp://ir.rcees.ac.cn/handle/311016/43258
Collection水污染控制实验室
Affiliation1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Joint Lab Environm Simulat & Pollut Con, Beijing 100085, Peoples R China
2.Chinese Acad Sci, Inst Urban Environm, Ctr Excellence Reg Atmospher Environm, Xiamen 361021, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Beijing Univ Chem Technol, Beijing Adv Innovat Ctr Soft Matter Sci & Engn, Beijing 100029, Peoples R China
Recommended Citation
GB/T 7714
Chen, Tianzeng,Liu, Yongchun,Liu, Changgeng,et al. Important role of aromatic hydrocarbons in SOA formation from unburned gasoline vapor[J]. ATMOSPHERIC ENVIRONMENT,2019,201:101-109.
APA Chen, Tianzeng,Liu, Yongchun,Liu, Changgeng,Liu, Jun,Chu, Biwu,&He, Hong.(2019).Important role of aromatic hydrocarbons in SOA formation from unburned gasoline vapor.ATMOSPHERIC ENVIRONMENT,201,101-109.
MLA Chen, Tianzeng,et al."Important role of aromatic hydrocarbons in SOA formation from unburned gasoline vapor".ATMOSPHERIC ENVIRONMENT 201(2019):101-109.
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