Laboratory Studies of Heterogeneous Chemistry on Clays and Minerals Representative of Tropospheric Dust Aerosol

对流层尘埃气溶胶代表的粘土和矿物的多相化学实验室研究

• 批准号: 0137261
• 负责人: Margaret Tolbert
• 金额: $ 43.1万
• 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: 2002
• 资助国家: 美国
• 起止时间: 2002-04-15 至 2006-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0137261&HistoricalAwards=false
• 关键词: Laboratory; Studies; Heterogeneous; Chemistry; Clays

Laboratory studies of heterogeneous uptake and chemical reactions on model particles representing atmospheric dust will be carried out. The apparatus used will be a newly developed Knudsen cell flow reactor equipped with a mass spectrometer for monitoring gaseous reactants and a Fourier-transform infrared spectrometer for detection of the condensed phase species. The experiments will be carried out at temperature and relative humidity conditions representative of the middle/upper troposphere. Specific reactions that will be studied as a function of relative humidity, temperature, particle mass and grain size include the hydrolysis of dinitrogen pentoxide (N205), the uptake of ozone, and the uptake and possible reaction of small organic molecules such as methanol.This work is important because it will provide direct measurements for processes long believed to be important in the atmosphere. Atmospheric aerosols affect the Earth's radiative budget and air quality.

将进行代表大气灰尘的模型颗粒的异质吸收和化学反应的实验室研究。 所使用的设备将是新开发的努森池流反应器，配备用于监测气态反应物的质谱仪和用于检测凝聚相物质的傅里叶变换红外光谱仪。 实验将在代表对流层中/上层的温度和相对湿度条件下进行。 将研究作为相对湿度、温度、颗粒质量和粒度的函数的特定反应，包括五氧化二氮 (N2O5) 的水解、臭氧的吸收以及小有机分子（例如甲醇）的吸收和可能的反应。这项工作很重要，因为它将为长期以来被认为在大气中很重要的过程提供直接测量。 大气气溶胶影响地球的辐射预算和空气质量。