globalchange  > 气候变化事实与影响
DOI: 10.1016/j.atmosenv.2017.04.033
Scopus记录号: 2-s2.0-85018767190
论文题名:
Kinetics and product identification of the reactions of (E)-2-hexenyl acetate and 4-methyl-3-penten-2-one with OH radicals and Cl atoms at 298 K and atmospheric pressure
作者: Gaona-Colmán E; , Blanco M; B; , Teruel M; A
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2017
卷: 161
起始页码: 155
结束页码: 166
语种: 英语
英文关键词: Oxidation mechanisms ; Relative kinetics ; SPME-CG-MS ; Tropospheric chemistry ; Unsaturated VOCs
Scopus关键词: Atmospheric composition ; Atmospheric pressure ; Chlorine compounds ; Chromatography ; Free radicals ; Ionization of gases ; Kinetics ; Rate constants ; Reaction kinetics ; Troposphere ; Unsaturated compounds ; Volatile organic compounds ; Oxidation mechanisms ; Relative kinetics ; SPME-CG-MS ; Tropospheric chemistry ; Unsaturated VOCs ; Atmospheric chemistry ; 2 hexenyl acetate ; 4 methyl 3 penten 2 one ; acetone ; chloride ; chlorine ; dimeticone ; divinylbenzene ; formaldehyde ; hydroxyl radical ; hydroxylamine ; o (2,3,4,5,6 pentafluorobenzyl)hydroxylamine hydrochloride ; unclassified drug ; volatile organic compound ; atmospheric chemistry ; atmospheric pressure ; chemical reaction ; chlorine ; experimental study ; extraction method ; gas chromatography ; hydroxyl radical ; ionization ; mass spectrometry ; organic compound ; oxidation ; reaction kinetics ; troposphere ; volatile organic compound ; Article ; atmospheric pressure ; chemical analysis ; chemical reaction ; chromatography ; comparative study ; controlled study ; derivatization ; flame ionization detection ; kinetics ; mass fragmentography ; molecule ; oxygenation ; priority journal ; rate constant ; reaction analysis ; room temperature ; solid phase microextraction
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: Rate coefficients for the reactions of hydroxyl radicals and chlorine atoms with two biogenic volatile organic compounds as (E)-2-hexenyl acetate and 4-methyl-3-penten-2-one have been determined at 298 K and atmospheric pressure. The decay of the organics was followed using a chromatograph with a flame ionization detector (GC-FID) and the rate constants were determined using a relative rate method. Rate coefficients are found to be (in cm3 molecule−1 s−1): k1(OH + (E)-2-hexenyl acetate) = (6.88 ± 1.41) × 10−11, k2(Cl + (E)-2-hexenyl acetate) = (3.10 ± 1.13) × 10−10, k3(OH + 4-methyl-3-penten-2-one) = (1.02 ± 0.20) × 10−10 and k4(Cl + 4-methyl-3-penten-2-one) = (2.66 ± 0.90) × 10−10 at 298 K. This is the first kinetic experimental study for these reactions studied under atmospheric pressure. The rate coefficients are compared with previous determinations for other unsaturated and oxygenated compounds and reactivity trends are presented. Products identification studies were performed using solid-phase microextraction (SPME) method employing on-fiber products derivatization with o-(2,3,4,5,6-pentafluorobenzyl) hydroxylamine hydrochloride using gas chromatograph with a mass spectrometer detector (GC-MS) for the reactions studied. In addition, atmospheric lifetimes of the unsaturated compounds studied are estimated and compared with other tropospheric sinks for these compounds. © 2017 Elsevier Ltd
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82811
Appears in Collections:气候变化事实与影响

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作者单位: Instituto de Investigaciones en Fisicoquímica de Córdoba (I.N.F.I.Q.C.), Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria, Córdoba, Argentina

Recommended Citation:
Gaona-Colmán E,, Blanco M,B,et al. Kinetics and product identification of the reactions of (E)-2-hexenyl acetate and 4-methyl-3-penten-2-one with OH radicals and Cl atoms at 298 K and atmospheric pressure[J]. Atmospheric Environment,2017-01-01,161
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