Effects of Pressure and Carrier Gas on Homogeneous Nucleation Vapors

abstractcts p.k——9976615。本文提出利用流动扩散云室（FDCC）研究载气及其压力对均匀成核过程的影响。这是热扩散云室（TDCC）的替代方案，同样基于质量和热扩散，但对成核过程及其在室中的位置进行了额外的控制。将建造一个高压（高达100 bar）的FDCC，并测试一系列气体的临界过饱和率和成核率，包括一系列载气（甲醇、乙醇、1-和2-丙醇、1-丁醇和正壬烷在氢、氦、氮和氩中的反应）。模型预测成核发生的位置。载气及其压力的影响是空气污染和化学工业高压成核过程中具有实际意义的重要科学开放问题。

AbstractCTS-9976615P.K. Hopke and M.P. Anisimov, Clarkson UniversityIt is proposed to investigate the effect of the carrier gas and its pressure on the process of homogeneous nucleation by using a flow diffusion cloud chamber (FDCC). This is an alternative to the thermal diffusion cloud chamber (TDCC), also based on mass and heat diffusion, but with additional control on the nucleation process and its location in the chamber. A high pressure (up to 100 bar) FDCC will be constructed, and critical supersaturating and nucleation rates for a series of gases a series of carrier gases (methanol, ethanol, 1- and 2-propanol, 1-butanol, and n-nonane in hydrogen, helium, nitrogen and argon) will be tested. A model predicts the location where nucleation occurs. The effect of carrier gases and their pressure is an important scientific open issue of practical relevance in air pollution, and high-pressure nucleation processes in chemical industry.