气候变化领域集成服务门户(CCPortal): Tropospheric reactivity of 2-ethoxyethanol with OH and NO3 radicals and Cl atoms. Kinetic and mechanistic study

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DOI	10.1016/j.atmosenv.2020.117367
	Tropospheric reactivity of 2-ethoxyethanol with OH and NO3 radicals and Cl atoms. Kinetic and mechanistic study
	Colmenar I.; Salgado S.; Martín P.; Aranda I.; Tapia A.; Cabañas B.
发表日期	2020
ISSN	1352-2310
卷号	224
英文摘要	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
关键词	Atmospheric chemistry FTIR detection method Gas Chromatography/Mass Spectrometry Hydroxyethers Reaction products Relative rate coefficients
语种	英语
scopus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
来源期刊	ATMOSPHERIC ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/249274
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
推荐引用方式 GB/T 7714	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],2020,224.
APA	Colmenar I.,Salgado S.,Martín P.,Aranda I.,Tapia A.,&Cabañas B..(2020).Tropospheric reactivity of 2-ethoxyethanol with OH and NO3 radicals and Cl atoms. Kinetic and mechanistic study.ATMOSPHERIC ENVIRONMENT,224.
MLA	Colmenar I.,et al."Tropospheric reactivity of 2-ethoxyethanol with OH and NO3 radicals and Cl atoms. Kinetic and mechanistic study".ATMOSPHERIC ENVIRONMENT 224(2020).