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- W1563345468 endingPage "102" @default.
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- W1563345468 abstract "Abdoul W., Rauzy E. and Péneloux A., 1991. Group-contribution equation of state for correlating and predicting thermodynamic properties of weakly polar and non-associating mixtures. Binary and multicomponent systems. Fluid Phase Equilibria, 68: 47-102. The applicability of the “Guggenheim quasi-lattice excess function equation of state” formalism is tested through a zeroth approximation group-contribution model and a Peng-Robinson-type equation of state. The temperature-dependent correlations of the group-contribution model are derived from low-pressure excess enthalpy (HE) and vaporliquid equilibrium (VLE) binary data and are then extended to the prediction of high-pressure vapor-liquid equilibria of mixtures of weakly polar and non-associating compounds (i.e. hydrocarbons, CO2, H2S, N2). The numbers of binary systems, data sets and determinations used in the development and testing of the method are 169, 805 and 10634 for low-pressure VLE; 282, 789 and 11308 for HE; and 163, 1329 and 12272 for high-pressure VLE, respectively. The average relative deviation with experiment in bubble-point pressure is 1% and the average absolute deviation in vapor-phase composition is 0.005 for low-pressure VLE data. Heat effects are well reproduced with average deviations of 12 J for 7009 determinations of binaries with HE less than 300 J and 5.5% for 4299 determinations of binaries with higher HE. Owing to a term accounting for chain-length effects, the accuracy of the prediction of high-pressure VLE is not deteriorated by the group-contribution approach (average deviations of 3% in bubble-point pressure, 0.0103 in vapor-phase composition). Thus, in addition to its predictive power, the method is found to be an improvement over the classical Peng-Robinson procedure with constant binary interaction parameters, especially for mixtures of molecules of different sizes." @default.
- W1563345468 created "2016-06-24" @default.
- W1563345468 creator A5000702618 @default.
- W1563345468 creator A5006909814 @default.
- W1563345468 creator A5068211782 @default.
- W1563345468 date "1991-11-01" @default.
- W1563345468 modified "2023-10-17" @default.
- W1563345468 title "Group-contribution equation of state for correlating and predicting thermodynamic properties of weakly polar and non-associating mixtures" @default.
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