Multiphase Chemistry and Mass Transport in Submicron Mixed Inorganic and Organic Aerosol Particles

亚微米混合无机和有机气溶胶颗粒中的多相化学和传质

基本信息

批准号：
1112414
负责人：
Joel Thornton
金额：
$ 35.73万
依托单位：
University of Washington
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2011
资助国家：
美国
起止时间：
2011-09-15 至 2015-08-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1112414&HistoricalAwards=false
关键词：
Multiphase Chemistry Mass Transport Submicron

项目摘要

The Environmental Chemical Sciences (ECS) program of the Division of Chemistry and the Atmospheric Chemistry program of the Division of Atmospheric and Geospace Sciences will support the research program of Prof. Joel Thornton of the University of Washington. Professor Thornton and his students will study the reactivity of N2O5 in small aerosol particles and how it depends upon particle size and morphology when moderately soluble organic carbonaceous material is mixed with inorganic salts in aqueous solution droplets. N2O5 reacts primarily on liquid or solid particles suspended in air (aerosol particles) that range in size from 10 nanometers to 1 micrometer. Understanding chemical reactivity in such small spatial domains is of fundamental importance beyond interpreting atmospheric composition. The study will make use of state of the art mass spectrometry and particle sizing instruments, and involve collaboration with researchers at Pacific Northwest National Laboratory (PNNL).The proposed research will improve our understanding of the fundamental length scales of chemical reactions, of interest generally to the physical and environmental chemistry communities, and provide reaction rate measurements on atmospherically relevant particles. The latter is critical for developing robust parameterizations of gas-particle reactions for use in air quality and coupled chemistry-climate models that ultimately inform regulatory policy. The project will provide excellent training opportunities to students, including to members of under-represented groups, who wish to pursue a professional scientific career in an area of great societal importance.

大气和地理水平科学系化学和大气化学计划的环境化学科学（ECS）计划将支持华盛顿大学乔尔·桑顿教授的研究计划。桑顿教授和他的学生将研究小气溶胶颗粒中N2O5的反应性，以及当中等溶解的有机碳质材料与水溶液中的无机盐混合时，它如何取决于粒度和形态。 N2O5主要对悬浮在空气（气溶胶颗粒）中的液体或固体颗粒反应，该尺寸从10纳米到1千分米。除了解释大气组成之外，了解如此小的空间结构域中的化学反应性至关重要。该研究将利用最先进的质谱和粒度仪器，并涉及与太平洋西北国家实验室（PNNL）的研究人员合作。拟议的研究将提高我们对化学反应的基本长度尺度的理解，通常对物理和环境化学社区感兴趣，并提供对大气相关的粒子的反应率测量。后者对于开发气体粒子反应的强大参数化至关重要，以用于空气质量和耦合化学气候模型，最终为监管政策提供了信息。该项目将为学生提供出色的培训机会，包括代表性不足的团体的成员，他们希望在社会重要性的领域从事专业的科学职业。