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DOI	10.1016/j.atmosenv.2020.117709
	Kinetic studies of the gas phase reaction of 1;2-propylene oxide with the OH radical over a temperature range of 261–335 K
	Virmani A.; Walavalkar M.P.; Sharma A.; Sengupta S.; Saha A.; Kumar A.
发表日期	2020
ISSN	13522310
卷号	237
英文摘要	The rate coefficient for the gas phase reaction of the OH radical with 1,2-propylene oxide (PPO) has been measured at 298 K using a relative rate method, employing Gas Chromatography (GC) technique, using ethane and 1,2-dichloroethane as reference compounds. Temperature dependence of the above reaction is also studied using an absolute rate method, employing Laser Photolysis-Laser Induced Fluorescence (LP-LIF) technique, over a range of 261–335 K. The measured bimolecular rate coefficients were fitted into the Arrhenius plot, which yielded a straight line roughly parallel to the x-axis and implies no or very weak temperature dependence. Within the experimental error limits, rate coefficients obtained at various temperatures, are found to vary within a narrow range from (4.65 ± 0.24) × 10−13 to (4.80 ± 0.24) × 10−13 cm3 molecule−1 s−1. Room temperature rate coefficient of the reaction of PPO with the OH radical was found to be (4.65 ± 0.24) × 10−13 cm3 molecule−1 s−1, using LP-LIF technique. These results have been discussed with available literature to unveil the probable mechanism. An average tropospheric lifetime of PPO has been estimated to be about two weeks for degradation by the OH radical. In addition, atmospheric parameters such as Radiative Efficiency (RE) and Global Warming Potential (GWP) for PPO are determined. Stable products formed are characterized using GC-MS and FT-IR techniques. Theoretical calculations are performed to understand the energetics and mechanism of H atom abstraction by OH, and also to complement the experimental observations. © 2020 Elsevier Ltd
英文关键词	1,2-propylene oxide; GWP; Kinetics; LP-LIF; Rate coefficient with OH
语种	英语
scopus关键词	Arrhenius plots; Free radicals; Gases; Global warming; Molecules; Phase interfaces; Photolysis; Temperature distribution; Atmospheric parameters; Global warming potential; Laser induced fluorescence; Radiative efficiency; Relative rate method; Temperature dependence; Theoretical calculations; Tropospheric lifetime; Gas chromatography; 1,2 dichloroethane; ethane; hydrogen; hydroxyl radical; propylene oxide; degradation; energetics; gas phase reaction; global warming; hydroxyl radical; reaction kinetics; temperature effect; Article; chemical reaction kinetics; controlled study; Fourier transform infrared spectroscopy; gas; greenhouse effect; mass fragmentography; photolysis; priority journal; room temperature; temperature dependence
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/145048
作者单位	Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai, 400085, India
推荐引用方式 GB/T 7714	Virmani A.,Walavalkar M.P.,Sharma A.,等. Kinetic studies of the gas phase reaction of 1;2-propylene oxide with the OH radical over a temperature range of 261–335 K[J],2020,237.
APA	Virmani A.,Walavalkar M.P.,Sharma A.,Sengupta S.,Saha A.,&Kumar A..(2020).Kinetic studies of the gas phase reaction of 1;2-propylene oxide with the OH radical over a temperature range of 261–335 K.Atmospheric Environment,237.
MLA	Virmani A.,et al."Kinetic studies of the gas phase reaction of 1;2-propylene oxide with the OH radical over a temperature range of 261–335 K".Atmospheric Environment 237(2020).