Cloud Chamber Study of SO2 Oxidation by Combustion Products

该项目的目标是开展非均相燃烧产物氧化二氧化硫的云室研究。拟议的2个实验试图提供以下问题的答案：(1)燃烧条件如何影响非均相SO氧化？(2)如何2火焰区和火后区颗粒表面的化学修饰是否影响其云成核特性？(3)水蒸气的相变如何影响在室温和2℃以下的氧化？这些问题将在一系列云室实验中得到解答。燃烧室与燃烧室相连，燃烧室是云核颗粒以及活性颗粒和气态物质的来源。该小室可以在很宽的温度范围内工作，并能够收集云水、间隙和总(云+间隙)气溶胶，用于化学分析和实时测量烟尘含量以及云和间隙气溶胶

The objective of this project is to perform cloud chamber studies of heterogeneous SO oxidation by combustion products. The proposed 2 experiments seek to provide answers to the following questions: (1) How do combustion conditions influence heterogeneous SO oxidation? (2) How 2 does the chemical modification of particle surfaces in the flame and postflame region influence their cloud nucleation properties? (3) How does phase change of water vapor influence SO oxidation at room and 2 subfreezing temperatures? These questions will be answered in a series of experiments with an experimental cloud chamber. The chamber is coupled to a combustor, which is a source of cloud nucleation particles and reactive particulate and gaseous species. The chamber can be operated in a wide temperature range and enables collection of cloud water interstitial and total (cloud + interstitial) aerosol for chemical analysis and real-time measurement of soot content and cloud and interstitial aerosol