Atmospheric initiated oxidation of short chain aliphatic ethers

Jianqiang Zhu (1) , Narcisse Tsona (1) , Abdelwahid S Mellouki (2, 3) , Lin Du (1)

1 Shandong University
2 ICARE - Institut de Combustion, Aérothermique, Réactivité et Environnement
3 OSUC - Observatoire des Sciences de l'Univers en région Centre

The reactions of two selected ethers, methyl n-butyl ether (MnBE) and methyl s-butyl ether (MsBE), with three atmospheric oxidants (OH/NO3/Cl) have been investigated at 298 +/- 2 K using the relative rate method and gas chromatography-mass spectrometry. The reaction trends of these short chain aliphatic ethers with the different oxidants have been discussed. From the obtained results, the reaction with OH is the main tropospheric loss process for MnBE and MsBE, with lifetimes of 19.2 h and 26.8 h, respectively. These short lifetimes indicate that the chemistry of these aliphatic ethers is important in areas close to their emission sources.

Mots clés: GAS-PHASE REACTIONS; OH RADICAL REACTIONS; TERT-BUTYL ETHER; RATE CONSTANTS; HYDROXYL RADICALS; CL ATOMS; DIMETHYL ETHER; NO3 RADICALS; RATE COEFFICIENTS; DIETHYL-ETHER

Domaines: Chimie; Milieux et Changements globaux

Jianqiang Zhu, Narcisse Tsona, Abdelwahid S Mellouki, Lin Du. Atmospheric initiated oxidation of short chain aliphatic ethers. Chemical Physics Letters, 2019, 720, pp.25-31. ⟨10.1016/j.cplett.2019.01.054⟩. ⟨hal-02074890⟩