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Missing in total OH reactivity of VOCs from gasoline evaporation

Ying Wu ,  Yu-Dong Yang ,  Min Shao ,  Si-Hua Lu

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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

    • 通讯作者: Min Shao,
  • 基金项目:

    This work was funded by the National Natural Science Foundation (Nos. 41125018, 41330635). (Nos. 41125018, 41330635)

摘要: 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.

English

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  • 发布日期:  2015-06-04
  • 收稿日期:  2015-04-07
  • 网络出版日期:  2015-05-19
通讯作者: 陈斌, bchen63@163.com
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