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DOI | 10.5194/acp-20-2695-2020 |
Kinetic and mechanistic study of the reaction between methane sulfonamide (CH3S(O)(2)NH2) and OH | |
Berasategui, Matias; Amedro, Damien; Edtbauer, Achim; Williams, Jonathan; Lelieveld, Jos; Crowley, John N. | |
2020-03-04 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS
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ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2020 |
卷号 | 20期号:5页码:2695-2707 |
文章类型 | Article |
语种 | 英语 |
国家 | Germany |
英文摘要 | Methane sulfonamide (MSAM), CH3S(O)(2)NH2, was recently detected for the first time in ambient air over the Red Sea and the Gulf of Aden where peak mixing ratios of approximate to 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 photo-oxidation 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) x 10(-13) cm(3) 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. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000518816700001 |
WOS关键词 | GAS-PHASE REACTIONS ; ATMOSPHERIC CHEMISTRY ; PHOTOCHEMICAL DATA ; SULFUR EMISSIONS ; BRANCHING RATIOS ; RADICALS |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/278664 |
专题 | 地球科学 |
作者单位 | Max Planck Inst Chem, Div Atmospher Chem, D-55128 Mainz, Germany |
推荐引用方式 GB/T 7714 | Berasategui, Matias,Amedro, Damien,Edtbauer, Achim,et al. Kinetic and mechanistic study of the reaction between methane sulfonamide (CH3S(O)(2)NH2) and OH[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2020,20(5):2695-2707. |
APA | Berasategui, Matias,Amedro, Damien,Edtbauer, Achim,Williams, Jonathan,Lelieveld, Jos,&Crowley, John N..(2020).Kinetic and mechanistic study of the reaction between methane sulfonamide (CH3S(O)(2)NH2) and OH.ATMOSPHERIC CHEMISTRY AND PHYSICS,20(5),2695-2707. |
MLA | Berasategui, Matias,et al."Kinetic and mechanistic study of the reaction between methane sulfonamide (CH3S(O)(2)NH2) and OH".ATMOSPHERIC CHEMISTRY AND PHYSICS 20.5(2020):2695-2707. |
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