The
isothermal vapor–liquid(−liquid) equilibria for
the water + cyclohexane + cyclohexanol, water + toluene + cyclohexanol,
and water + cyclohexylamine + cyclohexanol ternary systems are presented.
The experimental data were determined by the dynamic method in a modified
Röck and Sieg circulation still between 333.15 and 363.15 K
at reduced pressures. The experimental results were compared with
the predictions from both UNIQUAC and NRTL activity coefficient models
and the equation of state proposed by Elliott, Suresh, and Donohue
(ESD EOS).
The isothermal vapor–liquid
equilibrium data are presented
for three ternary systems: octane + cyclohexylamine + cyclohexanol,
cyclohexane + cyclohexylamine + cyclohexanol, and toluene + cyclohexylamine
+ cyclohexanol. The experimental data were determined by the dynamic
method in a modified Röck and Sieg circulation still at two
different temperatures and reduced pressures. The experimental results
were compared with the predictions from both UNIQUAC and NRTL activity
coefficient models and the equation of state proposed by Elliott,
Suresh, and Donohue (ESD EOS).
The adsorption excess isotherms of ethanol–water and propanol–water mixtures are studied on a series of carbon molecular sieves with well-separated micro- and mesoporosity at 298.15 K. The preferential adsorption of one component from a mixture is measured by using vibration densitometry for the concentration analysis. Microcalorimetrically measured enthalpies, which are released upon immersion of the carbon materials in the binary mixtures, complement the adsorption excess data. It is shown that (i) density measurements are well applicable for studying liquid-phase adsorption, (ii) liquid-adsorption isotherms are sensitive to smallest chain length differences of the adsorptives, (iii) the calculated separation diagrams depend strongly on the assumptions about the adsorbed phase, and (iv) the combined determination of gas, vapor and liquid adsorption isotherms and immersion enthalpies offers advantages for the analysis of complex adsorption systems.
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