气候变化领域集成服务门户(CCPortal): Kinetic and mechanistic study of the gas-phase reaction of ozone with γ-terpinene

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DOI	10.1016/j.atmosenv.2020.118073
	Kinetic and mechanistic study of the gas-phase reaction of ozone with γ-terpinene
	Fayad L.; Coeur C.; Fagniez T.; Secordel X.; Houzel N.; Mouret G.
发表日期	2020
ISSN	13522310
英文摘要	The ozone reaction of γ-terpinene (1-isopropyl-4-methyl-1,4-cyclohexadiene), a monoterperne emitted by Elm, Cypress, Waterhickory and Maple trees, has been investigated at 294 ± 2 K, atmospheric pressure and under dry conditions (relative humidity, RH < 2%) in two simulation chambers of the LPCA laboratory in Dunkerque (France): CHARME (CHamber for the Atmospheric Reactivity and the Metrology of the Environment) a 9.2 m3 evacuable cylinder in stainless steel electropolished and LPCA-ONE an 8 m3 cubic reactor in PMMA. Cyclohexane was used to scavenge the hydroxyl radicals formed from the rearrangement of the Criegee biradicals. The concentrations of the organic compounds were monitored versus the time with a PTR-ToF-MS and a TD-GC-FID. The rate coefficient for the γ-terpinene reaction with ozone has been determined using the pseudo-first-order and the relative-rate methods. The values obtained with both methods are in a very good agreement and give an average value of (2.10 ± 0.11) × 10−16 cm3 molecule−1 s−1 which leads to an atmospheric lifetime of 32 min for γ-terpinene with respect to its ozonolysis reaction. The main oxidation products observed and their respective molar yields (in %) include formic acid (7–11), glyoxal and/or acetone (4–9), 3-oxobutanal (6–8), 4-methyl-3-oxopentanal (5–8), acetic acid (5–9), acetaldehyde (3–6), formaldehyde (3–6), 3-oxopropanoic acid (2–4) and an unidentified compound with m/z 73.0 (2–3). The kinetic data are compared with the literature, and the reaction mechanism is discussed. To our knowledge this work represents the first mechanistic study for the ozonolysis reaction of γ-terpinene. © 2020 Elsevier Ltd
英文关键词	Mechanistic study; Rate coefficient; Simulation chamber; γ-terpinene ozonolysis
语种	英语
scopus关键词	Acetone; Atmospheric pressure; Chemical reactions; Mechanics; Ozone; Phase interfaces; Atmospheric lifetime; Gas-phase reactions; Mechanistic studies; Oxidation products; Ozonolysis reactions; Reaction mechanism; Relative rate method; Simulation chambers; Atmospheric humidity
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/153065
作者单位	Laboratoire de Physico-Chimie de l'Atmosphère, Université du Littoral Côte d'Opale, 189A Avenue Maurice Schumann, Dunkerque, France
推荐引用方式 GB/T 7714	Fayad L.,Coeur C.,Fagniez T.,et al. Kinetic and mechanistic study of the gas-phase reaction of ozone with γ-terpinene[J],2020.
APA	Fayad L.,Coeur C.,Fagniez T.,Secordel X.,Houzel N.,&Mouret G..(2020).Kinetic and mechanistic study of the gas-phase reaction of ozone with γ-terpinene.Atmospheric Environment.
MLA	Fayad L.,et al."Kinetic and mechanistic study of the gas-phase reaction of ozone with γ-terpinene".Atmospheric Environment (2020).