U.S.-U.K. Cooperative Research: Atmospheric Oxidation of Dimethyl Sulphide

美英合作研究：二甲基硫醚的大气氧化

• 批准号: 8913446
• 负责人: Anthony Hynes
• 金额: $ 0.88万
• 依托单位: Georgia Tech Research Corporation - GA Tech Research Institute
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-12-01 至 1993-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8913446&HistoricalAwards=false
• 关键词: U.S.; U.K.; Cooperative; Research; Atmospheric

This award will support collaborative research in atmospheric chemistry between Dr. Anthony J. Hynes, Georgia Institute of Technology and Dr. D.L. Bauch, School of Chemistry, University of Leeds, England. The objective of the proposed research is to study the kinetics and mechanisms of the atmospheric oxidation of dimethyl sulfide using flow discharge techniques. Dimethyl sulfide is known to be emitted by marine organisms and has been suggested to be a precursor to aerosol and cloud formation in marine environments; it is therefore of particular interest for the study of global climate. Experiments will utilize a discharge flow apparatus coupled with laser induced fluorescence and mass spectrometric detection of reactive intermediates and reaction products. Use of calibrated laser induced fluorescence and simultaneous observation of reactant loss and product formation should allow quantitative yields of methyl sulfide radical and sulfur dioxide from the hydroxyl radical initiated oxidation of dimethyl sulfide to be established. Attempts will be made to establish the feasibility of mass spectrometric sampling for the detection of stable reaction products. The project will benefit from the expertise of Dr. Hynes in the development of laser diagnostic techniques in molecular beams, atmospheric sampling and atmospheric kinetics. The British collaborator Dr. Bauch has many years of experience in the application of discharge flow technique to the study of oxygen and hydroxyl radical reactions. The results of this research should contribute to the understanding of the sulphur cycle in global atmospheric chemistry.

该奖项将支持佐治亚理工学院 Anthony J. Hynes 博士和 D.L. Bauch，英国利兹大学化学学院。 本研究的目的是利用流动放电技术研究二甲硫醚大气氧化的动力学和机制。 众所周知，二甲硫醚是由海洋生物排放的，并被认为是海洋环境中气溶胶和云形成的前体；因此，它对全球气候的研究特别有意义。 实验将利用放电流装置，结合激光诱导荧光和反应中间体和反应产物的质谱检测。 使用校准的激光诱导荧光并同时观察反应物损失和产物形成，应能够确定来自羟基自由基引发的二甲基硫醚氧化的甲基硫自由基和二氧化硫的定量产率。 将尝试建立质谱采样来检测稳定反应产物的可行性。 该项目将受益于海因斯博士在分子束、大气采样和大气动力学激光诊断技术开发方面的专业知识。 英国合作者Bauch博士拥有多年应用放电流技术研究氧和羟基自由基反应的经验。 这项研究的结果应有助于了解全球大气化学中的硫循环。