Transport Properties of Supercritical Fluid Mixtures

这个项目是早先一项运输研究的继续 主要是CO2与各种气体的超临界混合物的性质 碳氢化合物使用光谱方法。 实验包括： 用光子相关法测量扩散系数 光谱（PCS）和时间平均强度测量;粘度 使用探针粒子和PCS的测量;以及 使用近红外光谱测量。 这个项目的目标是 以确定温度、压力和成分的依赖性， 超临界流体混合物中的扩散系数，并提供 考虑溶质溶剂大小和极性的相关性。 由于许多理论涉及粘度和扩散系数， 同时测量是特别有价值的。

This project is a continuation of an earlier study of transport properties of supercritical mixtures of primarily co2 with various hydrocarbons using spectroscopic methods. The experiments comprise: diffusion coefficient measurements using Photon Correlation Spectroscopy (PCS) and time-averaged intensity measurements; viscosity measurements using probe particles and PCS; and composition measurements using near-IR spectroscopy. The goal of this project is to determine temperature, pressure and composition dependence of diffusion coefficients in supercritical fluid mixtures and provide correlations that take into account solute solvent size and polarity. Since many theories relate viscosity and diffusion coefficients, the simultaneous measurements are particularly valuable.