Tracer diffusion of aromatic hydrocarbons in liquid cyclohexane up to its critical temperature

摘要: Tracer diffusion coefficients in liquid cyclohexane of benzene, toluene, p-xylene, mesitylene, naphthalene, and phenanthrene have been determined from 298.2 to 523.2 K (TR = 0.54 ∼ 0.95) using the Taylor dispersion method. Positive deviations Arrhenius relationship are observed as critical temperature is approached, but a rough-hard-sphere theory found be adequate for describing data across entire range. On basis computer simulation results hard-sphere fluids, correlations involving solute solvent volumes their molecular weights also developed practical applications. diffusivities supercritical carbon dioxide adequately represented by proposed correlation, fluid density not far removed that dioxide.