DOI: 10.1016/j.atmosenv.2015.09.057
Scopus记录号: 2-s2.0-84942938554
论文题名: Reaction products and mechanisms for the reaction of n-butyl vinyl ether with the oxidants OH and Cl: Atmospheric implications
作者: Colmenar I ; , Martín P ; , Cabañas B ; , Salgado S ; , Tapia A ; , Martínez E
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 122 起始页码: 282
结束页码: 290
语种: 英语
英文关键词: Atmospheric chemistry
; Gas phase
; Kinetics
; Mechanism
; Rate coefficient
; Vinyl ethers
Scopus关键词: Absorption spectroscopy
; Atmospheric pressure
; Atoms
; Chemical bonds
; Chlorine
; Chromatography
; Degradation
; Enzyme kinetics
; Ethers
; Fourier transform infrared spectroscopy
; Free radicals
; Gas chromatography
; Light absorption
; Mass spectrometry
; Mechanisms
; Oxidants
; Reaction products
; Troposphere
; Atmospheric implications
; Fourier transform infrared absorption spectroscopy
; Gas chromatography-mass spectrometry
; Gasphase
; Rate coefficients
; Tropospheric chemistry
; Tropospheric lifetime
; Vinyl ethers
; Atmospheric chemistry
; butyl vinyl ether
; chloride
; chlorine
; chloroacetic acid
; ether
; formic acid
; hydroxyl radical
; oxidizing agent
; unclassified drug
; atmospheric chemistry
; chlorine
; degradation
; ether
; FTIR spectroscopy
; gas phase reaction
; hydroxyl radical
; oxidant
; oxidation
; reaction kinetics
; Article
; atmosphere
; atmospheric pressure
; infrared spectroscopy
; mass fragmentography
; oxidation
; photolysis
; priority journal
; qualitative research
; reaction analysis
; room temperature
; time of flight mass spectrometry
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: A reaction product study for the degradation of butyl vinyl ether (CH3(CH2)3OCHCH2) by reaction with chlorine atoms (Cl) and hydroxyl radicals (OH) has been carried out using Fourier Transform Infrared absorption spectroscopy (FTIR) and/or Gas Chromatography-Mass Spectrometry with a Time of Flight analyzer (GC-TOFMS). The rate coefficient for the reaction of butyl vinyl ether (BVE) with chlorine atoms has also been evaluated for the first time at room temperature (298 ± 2) K and atmospheric pressure (708 ± 8) Torr. The rate coefficient obtained was (9.9 ± 1.5) × 10-10 cm3molecule-1s-1 and this indicates the high reactivity of butyl vinyl ether with Cl atoms. However, this value may be affected by the dark reaction of BVE with Cl2. The results of a qualitative study of the Cl reaction show that the main oxidation products are butyl formate (CH3(CH2)3OC(O)H), butyl chloroacetate (CH3(CH2)3OC(O)CH2Cl and formyl chloride (HCOCl). Individual yields in the ranges ~16-40% and 30-70% in the absence and presence of NOx, respectively, have been estimated for these products. In the OH reaction, butyl formate and formic acid were identified as the main products, with yields of around 50 and 20%, respectively. Based on the results of this work and a literature survey, the addition of OH radicals and Cl atoms at the terminal C atom of the double bond in CH3(CH2)3OCHCH2 has been proposed as the first step in the reaction mechanism for both of the studied oxidants. The tropospheric lifetime of butyl vinyl ether is very short and, as a consequence, it will be rapidly degraded and will only be involved in tropospheric chemistry at a local level. The degradation products of these reactions should be considered when evaluating the atmospheric impact. © 2015 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81434
Appears in Collections: 气候变化事实与影响
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作者单位: Departamento de Química Física, Facultad de Ciencias y Tecnologías Químicas, Universidad de Castilla La Mancha, Avda. Camilo José Cela S/N, Ciudad Real, Spain; Instituto de Combustión y Contaminación Atmosférica (ICCA), Universidad de Castilla La Mancha, Camino Moledores S/N, Ciudad Real, Spain
Recommended Citation:
Colmenar I,, Martín P,, Cabañas B,et al. Reaction products and mechanisms for the reaction of n-butyl vinyl ether with the oxidants OH and Cl: Atmospheric implications[J]. Atmospheric Environment,2015-01-01,122