A Study of Chemical Reactions in Levitated Particles

悬浮粒子中化学反应的研究

• 批准号: 8909233
• 负责人: Charles Richardson
• 金额: $ 14.12万
• 依托单位: University of Arkansas
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-06-01 至 1993-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8909233&HistoricalAwards=false
• 关键词: Study; Chemical; Reactions; Levitated; Particles

Particles in the micron-size range are levitated in a quadrupole trap while being exposed to varying levels of atmospheric gases. The quadrupole trap permits the observation of particle mass changes resulting from interaction of a particle with components of its gaseous environment. Candidate systems for study will include sulfuric acid droplets interacting with ammonia, the absorption by sodium chloride solutions of sulfuric acid and nitric acid vapors with release of hydrogen chloride, the production of sulfuric or nitric acid by exposure of sodium chloride solutions to SO2, NO2, O3, or H2 O2, the production of ammonium sulfate in solution droplets exposed to SO2, O3 and NH3, the production of sulfuric acid in sodium chloride solution droplets doped with iron group ions and exposed to SO2 and O2, and the production of ammonium sulfate at the surface of manganese sulfate particles exposed to H2O, O2, SO2 and NH3. Individual particles suspended in the trap will be exposed to flowing N2 containing one or more of the reactant gases while changes in mass and particle size (by light scattering) will be monitored. Results will be presented as rates of net change.

微米尺寸范围内的颗粒悬浮在 四极阱，同时暴露于不同水平的 大气气体 四极阱允许观察 由粒子相互作用引起的粒子质量变化 与其气体环境的成分。 研究的候选系统将包括硫酸 液滴与氨相互作用，钠的吸收 硫酸和硝酸蒸气的氯化物溶液， 释放氯化氢，生产硫酸或 通过将氯化钠溶液暴露于SO2，NO2， O3或H2 O2，在溶液中生产硫酸铵 液滴暴露于SO2，O3和NH3，产生硫酸 掺杂铁基的氯化钠溶液液滴中的酸 离子并暴露于SO2和O2，以及铵的产生 硫酸锰颗粒表面的硫酸盐 H2O、O2、SO2和NH3。 悬浮在捕集器中的单个颗粒将暴露在 使含有一种或多种反应物气体的N2流动， 质量和粒度的变化（通过光散射）将是 监测。 结果将以净变化率列报。