In this paper the Soave-Redlich-Kwong equation of state with quadratic mixing rule has been tested for correlation of vapour-liquid equilibria (VLE) at high pressures in the binary nitrogen + dimethyl ether, dimethyl ether + methanol, nitrogen + methanol, carbon dioxide + dimethyl ether and carbon dioxide + methanol systems. Using the critical properties of pure components and the parameters kij obtained for each binary pair, this equation of state

An experimental technique for the measurements of gas solubility in heavy liquids or solids at high pressure is presented. The new apparatus was recently constructed in the frame of the Thermodynamics Laboratory from Institute of Physical Chemistry “I. G. Murgulescu”. It allows measurements up to 70 bars for pressure and up to 70 - 80 0C for temperature. The gas solubility is determined from the pressure drop of the gas due to the absorption

Isothermal (P, T, x, y) data have been measured for the binary and ternary systems nitrogen + dimethyl ether at 15, 35, and 45 °C, dimethyl ether + methanol at 80 °C, carbon dioxide + dimethyl ether + methanol at 40 and 60 °C, and nitrogen + dimethyl ether + methanol at 40 and 15 °C. The pressure range under investigation was up to 9.5 MPa. The experimental data for the binary systems were correlated with the SRK equation of state using the MHV2

An equipment based on the ebulliometric method for the precise measurement of complete vapour-liquid equilibrium data is described. The reability and accuracy of the measured data on reference mixture benzene+ tetrachloromethane at 313.15 K, in comparison with literature data, are considered in terms of the dependence of the molar excess Gibbs energy on composition.

The literature and our data on vapour-liquid equilibria (VLE), molar excess Gibbs energies (GE), molar excess enthalpies (HE), natural logarithms of activity coefficients at infinite dilution (ln gamma i infinite), and partial molar excess enthalpies at infinite dilution (H i E,infinite) of cycloalkane + n-alkylbenzene mixtures are examined in terms of the DISQUAC group contribution model. The components of the mixtures are characterized by three

In the frame of a project dealing with phase equilibria in ketones + chloroalkanes, isothermal vapour-liquid equilibrium P-x-y data are reported for binary mixtures containing pentan-3-one with 1,2-dichloroethane (from 323.15 to 353.15 K), 1,3-dichloropropane (from 343.15 to 373.15 K), 1,4-dichlorobutane (from 343.15 to 373.15 K), trichloromethane (from 313.15 to 343.15 K), 1,1,1-trichloroethane (from 323.15 to 353.15 K), and 1,1,2,2-tetrachloroethane

In Romania, the research work is performed at different institutions: universities, institutes of the Academy, independent institutes for applied research, and industrial enterprises which have own R&D department. The research in the field of molecular modeling and process simulation has a good tradition, but unfortunately, it is not well known. The progressive development has started after December 1989. In February 1991, the Commission of Quantum

Isothermal P-x-y vapor-liquid equilibrium data are reported for 1,2-dichloroethane + pentan-3-one at 323.15, 333.15, 343.15, and 353.15 K and for 1,3-dichloropropane + pentan-3-one at 343.15, 353.15, 363.15, and 373.15 K. The data were correlated using the Redlich-Kister equation taking into account the vapor phase imperfection in terms of the 2nd virial coefficients. The calculated equimolar excess Gibbs energies at 343.15 K, are of the order of

Isothermal P-x-y vapor-liquid equilibrium data are reported at 373.15, 383.15, and 393.15 K for cyclooctane + butylbenzene and at 343.15 and 353.15 K for heptane + cyclooctane mixtures. The data were correlated using the Redlich-Kister equation taking into account the vapor phase imperfection in terms of the 2nd virial coefficients. The calculated equimolar excess Gibbs energy of cyclooctane + butylbenzene is of the order of 180 J mol-1 at 373.15