Tropospheric reactivity of 2-ethoxyethanol with OH and NO3 radicals and Cl atoms. Kinetic and mechanistic study
作者： Inmaculada Colmenar , Sagrario Salgado , Pilar Martín , Inmaculada Aranda , Araceli Tapia
DOI: 10.1016/J.ATMOSENV.2020.117367
关键词: Reactivity (chemistry) 、 Formaldehyde 、 Ethylene glycol 、 Radical 、 Chemistry 、 Alkoxy group 、 Inorganic chemistry 、 Methylene 、 Ethyl formate 、 2-Ethoxyethanol
摘要: Abstract Recent studies reveal that 2-ethoxyethanol (2EE) (CH3CH2OCH2CH2OH) is emitted from diesel/biodiesel blends used in vehicles. This compound has also been investigated with diesel fuel for the reduction of CO emissions, hydrocarbons and particulate matter. In work described here, rate coefficients reactions OH NO3 radicals Cl atoms 2EE have determined at (298 ± 2) K a total pressure ~700 torr using relative method SPME/GC-MSTOF (Solid Phase Microextraction/Gas Chromatography-Mass Spectrometry Time Flight Detection) FTIR (Fourier Transform Infrared Spectroscopy) as detection techniques. The following (in cm3 molecule−1 s−1) obtained: (2.02 ± 0.19) × 10−10, (2.17 ± 0.11) × 10−11 (4.80 ± 0.48) × 10−15 Cl, ·OH ·NO3 reactions, respectively. product formation investigated. Ethylene glycol monoacetate, ethylene monoformate, formaldehyde, ethyl glycolate formate identified major products for·OH reactions. nitrated compounds observed presence NO. are explained by mechanism involving initial attack oxidant methylene groups followed subsequent resulting alkyl alkoxy radicals. atmospheric lifetimes calculated dominant loss process this clearly daytime reaction radical.
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