Prediction of binary diffusion coefficients of solutes in supercritical solvents
โ Scribed by Chao-Hong He
- Publisher
- American Institute of Chemical Engineers
- Year
- 1997
- Tongue
- English
- Weight
- 354 KB
- Volume
- 43
- Category
- Article
- ISSN
- 0001-1541
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โฆ Synopsis
New correlations, based on the rough hard-sphere theory and an extensive literature database, were developed for the determination of the binary difision coeficients of liquid and solid solutes in supercritical solvents. The correlations were tested to predict 107 solute-solvent systems with good results. The input data required for the correlations are the solute molecular weight, temperature, density and the solvent basic properties (molecular weight, critical volume, and critical pressure).
๐ SIMILAR VOLUMES
Several versions of free-volume theory have been proposed to correlate or predict the solvent diffusion coefficient of a polymer/solvent system. The quantity of free volume is usually determined by the Williams-Landel-Ferry (WLF) equation from viscosity data of the pure component in these theories.
Solvent effects on the binary mixtures of amides with alcohols and water were investigated by means of Reichardt's E T (30) solvatochromic indicator. E N T parameters of binary solvent mixtures of formamide, N-methylformamide and N,N-dimethylformamide with water, methanol, propan-2-ol, 2-methylpropa
## Abstract A corresponding states approach has been used successfully to correlate reduced selfโdiffusivity of pure liquids with reduced temperature and acentric factor. In addition, dimensional analysis techniques have been used to accurately relate viscosity, normal boiling point and temperature