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Rozpustnost 1-ethyl-3-methylimidazolium ethylsulfátu v superkritickém CO2
Bendová, Magdalena ; Sedláková, Zuzana ; Wagner, Zdeněk
In this contribution was studied by the synthetic method. A Thar Technologies Supercritical Phase Monitor was used to carry out the measurements. To check the accuracy of the synthetic apparatus, phase behavior of the binary mixture MTBE plus CO2 was measured both by means of the synthetic method and using a high-pressure phase equilibrium apparatus built in our laboratory. The acquired data were subsequently modeled by a cubic SRK-based equation of state proposed by Yokozeki and Shiflett.
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Měření (P, Vm, T) chování systému oktan + benzen při teplotách 298.15 K až 328.15 K a při tlacích do 40 MPa
Morávková, Lenka ; Wagner, Zdeněk ; Linek, Jan
The densities of (octane + benzene) were measured at elevated pressures (0.1 to 40) MPa at four temperatures over the range 298.15 K to 328.15 K with a high-pressure apparatus. The high-pressure density data were fitted to the Tait equation and the isothermal compressibilities were calculated with a novel computation procedure with the aid of this equation. The lowand high-pressure values of excess molar volume V E m calculated from the density data show that the deviations from ideal behaviour in the system are practically independent of temperature and decreases slightly as the pressure is raised. The V E m data were fitted to the fourth-order Redlich–Kister equation, with the maximum likelihood principle being applied for the determination of the adjustable parameters.
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Teplotní závislost dodatkových molárních objemů v systémech oktan-aromatické uhlovodíky
Linek, Jan ; Morávková, Lenka ; Wagner, Zdeněk
Densities were measured for the liquid benzene and 1,3,5-trimethylbenzene, and for nine their mixtures at four temperatures between 298.15 K and 328.15 K and at pressures up to 40 MPa. An apparatus for density measurements of liquid and liquid mixtures whose main part is a high-pressure vibrating-tube densimeter working in a static mode was used for the measurement. The density data were fitted to the Tait equation and the isothermal compressibilities were calculated with the aid of this equation. Excess molar volumes were also calculated from the densities and fitted to the Redlich-Kister equation.
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