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Effect of Molecular Structure on the Atmospheric Oxidation of Organic Compounds and Aerosol Formation

分子结构对有机化合物大气氧化和气溶胶形成的影响

基本信息

批准号：
1750447
负责人：
Paul Ziemann
金额：
$ 32.57万
依托单位：
University of Colorado at Boulder
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2018
资助国家：
美国
起止时间：
2018-05-01 至 2022-04-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1750447&HistoricalAwards=false
关键词：
Effect Molecular Structure Atmospheric Oxidation

项目摘要

The overall objective of the project is to conduct experimental and modeling studies to achieve an improved understanding and quantitative description of the effects of the molecular structure of organic compounds on their atmospheric oxidation products and their tendency for the products to form aerosols. Atmospheric gaseous and particulate compounds can affect air quality, visibility, climate, and human and ecosystem health. This project will provide new data on organic oxidation products and mechanisms, which should be applicable to many other atmospheric reactions because of the similarities in basic reaction pathways.Experiments will be conducted in large volume, inert Teflon environmental chambers under simulated atmospheric conditions. Chemical reaction products present in the gas and particle phases will be identified and quantified using real-time and offline methods that employ various combinations of appropriate analytical techniques such as chromatography, spectroscopy, and mass spectrometry. Specific experiments are designed to quantify the effects of linear and branched molecular structures and oxygenated functional groups on chemical reaction pathways. Results will be incorporated into a detailed chemical reaction model, which will be evaluated and further improved by comparing simulations with measured gas- and particle-phase products formed from the oxidation of a set of atmospherically representative alkanes, alkenes, and oxygenated compounds, under both polluted and clean air conditions.The provision of support of a graduate student along with activities intended to contribute to public understanding of science of air quality and climate issues are mentioned project activities. The models that will be improved and evaluated as a result of this project are used in laboratory, regional, and global simulations, which are widely used to evaluate potential effects of gases and particles on visibility, human health, ecosystems, and climate.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

该项目的总体目标是进行实验和模拟研究，以更好地了解和定量描述有机化合物的分子结构对其大气氧化产物的影响及其产物形成气溶胶的趋势。大气中的气体和颗粒化合物会影响空气质量、能见度、气候以及人类和生态系统的健康。该项目将提供有关有机氧化产物和机理的新数据，由于基本反应途径的相似性，这些数据应适用于许多其他大气反应。实验将在模拟大气条件下的大体积惰性Teflon环境室中进行。将使用实时和离线方法识别和定量气相和颗粒相中存在的化学反应产物，这些方法采用适当分析技术（如色谱法、光谱法和质谱法）的各种组合。具体的实验设计，以量化的线性和支化的分子结构和含氧官能团的化学反应途径的影响。结果将被纳入一个详细的化学反应模型，这将是评估和进一步改进，通过比较模拟与测量的气相和颗粒相的产品形成的一套大气代表性的烷烃，烯烃和含氧化合物的氧化，研究生沿着参加旨在帮助公众了解空气质量科学和气候问题被提及的项目活动。作为该项目的结果，将被改进和评估的模型将用于实验室、区域和全球模拟，这些模拟被广泛用于评估气体和颗粒对能见度、人类健康、生态系统和气候的潜在影响。该奖项反映了NSF的法定使命，并被认为值得通过使用基金会的知识价值和更广泛的影响审查标准进行评估来支持。