caa a22 4500 465756018 CHVBK 20180323111847.0 cr unu---uuuuu 170327e19900301xx s 000 0 eng 10.1007/BF01133568 doi (NATIONALLICENCE)springer-10.1007/BF01133568 Mixture equations of state: Composition dependence [Elektronische Daten] [M. Khan, M. Mannan, L. Lee, K. Starling] This paper discusses theoretical models for the composition dependence of equations of state and compares the quality of predictions against experimental thermodynamic property data. The mean density approximation (MDA) and the van der Waals one-fluid (VDW1) model are compared with hybrid mixing rules (HMR), in which rigorous composition dependence is used for the second and third virial coefficients and the conformai solution model is used for equation-of-state density terms beyond the third virial term. It is found that when values of unity are used for all binary and three-body unlike interaction parameters, calculated densities for methane-normal heptane mixtures have average absolute deviations of 3.54% for MDA, 4.04% for VDW1, and 2.59% for HMR. When vapor-liquid equilibrium calculations were performed for the methane-normal heptane system, average absolute deviations of calculatedK values from experimental values were 16.7% for methane and 36.4% for normal heptane using HMR, whereas when conformal solution model (CSM) mixing rules were used, the results were 34.8% for methane and 66.7% for normal heptane. When the binary interaction parameter for the characterization of interaction energies is determined, it is found to be less sensitive to state conditions in the case of HMR than either MDA or VDW1. These preliminary results suggest the potential of mixture equation-of-state methods which utilize rigorous composition dependence for the lower-order virial coefficients. Plenum Publishing Corporation, 1990 composition dependence nationallicence equation of state nationallicence hybrid mixing rules nationallicence Khan M. School of Chemical Engineering and Materials Science, University of Oklahoma, 73019, Norman, Oklahoma, USA aut Mannan M. School of Chemical Engineering and Materials Science, University of Oklahoma, 73019, Norman, Oklahoma, USA aut Lee L. School of Chemical Engineering and Materials Science, University of Oklahoma, 73019, Norman, Oklahoma, USA aut Starling K. School of Chemical Engineering and Materials Science, University of Oklahoma, 73019, Norman, Oklahoma, USA aut International Journal of Thermophysics Kluwer Academic Publishers-Plenum Publishers 11/2(1990-03-01), 373-380 0195-928X 11:2<373 1990 11 10765 https://doi.org/10.1007/BF01133568 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF01133568 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Khan M. School of Chemical Engineering and Materials Science, University of Oklahoma, 73019, Norman, Oklahoma, USA aut NATIONALLICENCE 700 1- Mannan M. School of Chemical Engineering and Materials Science, University of Oklahoma, 73019, Norman, Oklahoma, USA aut NATIONALLICENCE 700 1- Lee L. School of Chemical Engineering and Materials Science, University of Oklahoma, 73019, Norman, Oklahoma, USA aut NATIONALLICENCE 700 1- Starling K. School of Chemical Engineering and Materials Science, University of Oklahoma, 73019, Norman, Oklahoma, USA aut NATIONALLICENCE 773 0- International Journal of Thermophysics Kluwer Academic Publishers-Plenum Publishers 11/2(1990-03-01), 373-380 0195-928X 11:2<373 1990 11 10765 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer