Ozone Oxidation of Biogenic and Anthropogenic Alkenes: The Fate of the Criegee Intermediates

生物和人为烯烃的臭氧氧化：Criegee 中间体的命运

• 批准号: 9629577
• 负责人: Suzanne Paulson
• 金额: $ 29.6万
• 依托单位: University of California-Los Angeles
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-08-01 至 2001-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9629577&HistoricalAwards=false
• 关键词: Ozone; Oxidation; Biogenic; Anthropogenic; Alkenes

9629577 Paulson Alkenes are important chemical species for the formation of oxidizing compounds within the troposphere. On a global scale, alkenes comprise the majority of non-methane hydrocarbon emissions, and roughly half of the carbon that reacts through an ozone-alkene chemical reaction, does so by forming short-lived Criegee reaction intermediates. The research supported by this award is expected to make significant contributions to the understanding of the mechanism of ozone-alkene reactions in the troposphere, especially those involving photochemical reactions of biogenic alkenes with tropospheric ozone. The project examines the kinetics and mechanism of ozone-alkene reactions using Teflon batch reactors in conjunction with GC/FID/MS, gas phase FTIR spectroscopy and FTIR/matrix isolation analytical techniques. The experimental approach focuses on the decomposition and reaction pathways of Criegee reaction intermediates. Study of the chemical reaction mechnisms involving Criegee intermediates has important possibilities for understanding the processes that control the formation of oxidants in the troposphere. Overall, the goals described in the research project would lead to a significant improvement of our understanding of atmospheric reactions involving alkenes, and hence of air pollution and tropospheric chemistry. ATM-9629353

9629577 Paulson 烯烃是在对流层内形成氧化化合物的重要化学物质。 在全球范围内，烯烃占非甲烷碳氢化合物排放的大部分，并且通过臭氧-烯烃化学反应发生反应的碳中大约一半是通过形成短命的克里吉反应中间体来实现的。 该奖项支持的研究预计将为了解对流层臭氧-烯烃反应机制做出重大贡献，特别是那些涉及生物烯烃与对流层臭氧的光化学反应的机制。 该项目使用聚四氟乙烯间歇式反应器，结合 GC/FID/MS、气相 FTIR 光谱和 FTIR/基质分离分析技术，研究臭氧-烯烃反应的动力学和机理。实验方法侧重于 Criegee 反应中间体的分解和反应途径。研究 Criegee 中间体的化学反应机制对于理解对流层中氧化剂形成的控制过程具有重要的可能性。 总体而言，该研究项目中描述的目标将显着提高我们对涉及烯烃的大气反应的理解，从而显着提高对空气污染和对流层化学的理解。 ATM-9629353