Citation: Ying Wu, Yu-Dong Yang, Min Shao, Si-Hua Lu. Missing in total OH reactivity of VOCs from gasoline evaporation[J]. Chinese Chemical Letters, ;2015, 26(10): 1246-1248. doi: 10.1016/j.cclet.2015.05.047 shu

Missing in total OH reactivity of VOCs from gasoline evaporation

1.
State Joint Key Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China

Corresponding author: Min Shao,
Received Date: 7 April 2015
Available Online: 19 May 2015
Fund Project: This work was funded by the National Natural Science Foundation (Nos. 41125018, 41330635). (Nos. 41125018, 41330635)

Gasoline evaporation is an important anthropogenic source of atmospheric volatile organic compounds (VOCs). Total OH reactivity for gasoline vapor was measured from 4 kinds of gasoline for the first time by comparative reactivity method (CRM) using proton transfer reaction mass spectrometer (PTR-MS). Compositions of 56 PAMS (photochemical assessment monitoring station) nonmethane hydrocarbons (NMHCs) were measured for both liquid and headspace of gasoline. We found high abundance of alkenes and aromatics in gasoline. The calculated OH reactivity derived from quantified NMHCs speciation accounted for only 57±4% of total reactivity obtained from CRM method. N-Alkenes, only 6 wt% in liquid gasoline, contributed to 70% of calculated reactivity. We assume that the undetected branched alkenes are the possible reason for the missing reactivity. Wesuggest that the priority of gasoline quality improvement is to reduce alkenes content in gasoline in term of reactivity-based control.
- Volatile organic compounds (VOCs),
- Comparative reactivity method (CRM),
- Missing OH reactivity,
- Gasoline evaporation
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沈阳化工大学材料科学与工程学院沈阳 110142