globalchange  > 气候变化与战略
DOI: 10.1016/j.atmosenv.2020.117367
论文题名:
Tropospheric reactivity of 2-ethoxyethanol with OH and NO3 radicals and Cl atoms. Kinetic and mechanistic study
作者: Colmenar I.; Salgado S.; Martín P.; Aranda I.; Tapia A.; Cabañas B.
刊名: Atmospheric Environment
ISSN: 1352-2310
出版年: 2020
卷: 224
语种: 英语
英文关键词: Atmospheric chemistry ; Diesel engines ; Ethylene ; Ethylene glycol ; Fourier transform infrared spectroscopy ; Free radicals ; Gas chromatography ; Mass spectrometry ; Nitration ; Polyols ; Reaction products ; Atmospheric lifetime ; Chromatography-mass spectrometry ; Detection methods ; Gas chromatography/Mass spectrometry ; Hydroxyethers ; Relative rate method ; Relative rates ; Solid-phase microextraction ; Chlorine ; 2 ethoxyethanol ; biodiesel ; chloride ; diesel fuel ; ethylene glycol ; formaldehyde ; formic acid ; glycolic acid ; hydroxyl radical ; nitrate ; radical ; additive ; carbon monoxide ; diesel ; ethylene ; hydrocarbon ; nitrate ; oxidant ; particulate matter ; pressure field ; reaction kinetics ; reduction ; troposphere ; Article ; controlled study ; Fourier transform infrared spectroscopy ; mass fragmentography ; pressure ; priority journal ; reaction analysis ; solid phase microextraction ; troposphere
学科: Atmospheric chemistry ; FTIR detection method ; Gas Chromatography/Mass Spectrometry ; Hydroxyethers ; Reaction products ; Relative rate coefficients
中文摘要: Recent studies reveal that 2-ethoxyethanol (2EE) (CH3CH2OCH2CH2OH) is emitted from diesel/biodiesel blends used in vehicles. This compound has also been investigated in blends with diesel fuel for the reduction of CO emissions, hydrocarbons and particulate matter. In the work described here, rate coefficients for the reactions of OH and NO3 radicals and Cl atoms with 2EE have been determined at (298 ± 2) K and a total pressure of ~700 torr using a relative rate method with SPME/GC-MSTOF (Solid Phase Microextraction/Gas Chromatography-Mass Spectrometry Time of Flight Detection) and FTIR (Fourier Transform Infrared Spectroscopy) as detection techniques. The following rate coefficients (in cm3 molecule−1 s−1) have been obtained: (2.02 ± 0.19) × 10−10, (2.17 ± 0.11) × 10−11 and (4.80 ± 0.48) × 10−15 for Cl, ·OH and ·NO3 reactions, respectively. The product formation has also been investigated. Ethylene glycol monoacetate, ethylene glycol monoformate, formaldehyde, ethyl glycolate and ethyl formate have been identified as major products for·OH and Cl reactions. The formation of nitrated compounds has also been observed for the reactions with ·NO3 and with Cl in the presence of NO. The products are explained by a mechanism involving initial attack of the oxidant at the methylene groups followed by subsequent reactions of the resulting alkyl and alkoxy radicals. The atmospheric lifetimes calculated for 2EE reveal that the dominant loss process for this compound is clearly the daytime reaction with the OH radical. © 2020 Elsevier Ltd
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/160890
Appears in Collections:气候变化与战略

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作者单位: Universidad de Castilla La Mancha, Departamento de Química Física, Facultad de Ciencias y Tecnologías Químicas, Avda Camilo José Cela S/n, Ciudad Real, 13071, Spain

Recommended Citation:
Colmenar I.,Salgado S.,Martín P.,et al. Tropospheric reactivity of 2-ethoxyethanol with OH and NO3 radicals and Cl atoms. Kinetic and mechanistic study[J]. Atmospheric Environment,2020-01-01,224
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