气候变化领域集成服务门户(CCPortal): Kinetic and mechanistic study of the reaction between methane sulfonamide (CH3S(O)2NH2) and OH

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DOI	10.5194/acp-20-2695-2020
	Kinetic and mechanistic study of the reaction between methane sulfonamide (CH3S(O)2NH2) and OH
	Berasategui M.; Amedro D.; Edtbauer A.; Williams J.; Lelieveld J.; Crowley J.N.
发表日期	2020
ISSN	16807316
起始页码	2695
结束页码	2707
卷号	20 期号:5
英文摘要	Methane sulfonamide (MSAM), CH3S.O/2NH2, was recently detected for the first time in ambient air over the Red Sea and the Gulf of Aden where peak mixing ratios of 60 pptv were recorded. Prior to this study the rate constant for its reaction with the OH radical and the products thereby formed were unknown, precluding assessment of its role in the atmosphere. We have studied the OH-initiated photooxidation of MSAM in air (298 K, 700 Torr total pressure) in a photochemical reactor using in situ detection of MSAM and its products by Fourier transform infrared (FTIR) absorption spectroscopy. The relative rate technique, using three different reference compounds, was used to derive a rate coefficient of.1:4 ± 0:3/× 10-13 cm3 molec:-1 s-1. The main end products of the photo-oxidation observed by FTIR were CO2, CO, SO2, and HNO3 with molar yields of (0:73±0:11), (0:28 ± 0:04), (0:96 ± 0:15), and (0:62 ± 0:09), respectively. N2O and HC.O/OH were also observed in smaller yields of (0:09 ± 0:02) and (0:03 ± 0:01). Both the low rate coefficient and the products formed are consistent with hydrogen abstraction from the-CH3 group as the dominant initial step. Based on our results MSAM has an atmospheric lifetime with respect to loss by reaction with OH of about 80 d. © 2020 Authors.
关键词	ambient air FTIR spectroscopy hydroxide methane mixing ratio photooxidation reaction kinetics reaction rate Arabian Sea Gulf of Aden Indian Ocean Red Sea [Indian Ocean]
语种	英语
来源机构	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/132190
推荐引用方式 GB/T 7714	Berasategui M.,Amedro D.,Edtbauer A.,et al. Kinetic and mechanistic study of the reaction between methane sulfonamide (CH3S(O)2NH2) and OH[J]. Atmospheric Chemistry and Physics,2020,20(5).
APA	Berasategui M.,Amedro D.,Edtbauer A.,Williams J.,Lelieveld J.,&Crowley J.N..(2020).Kinetic and mechanistic study of the reaction between methane sulfonamide (CH3S(O)2NH2) and OH.,20(5).
MLA	Berasategui M.,et al."Kinetic and mechanistic study of the reaction between methane sulfonamide (CH3S(O)2NH2) and OH".20.5(2020).