The speed of sound in gaseous propane at temperatures between 225 K and 375 K and at pressures up to 0.8 MPa

An improved Helmholtz energy model for non-polar fluids and their mixtures. Part 2: Application to mixtures of non-polar fluids

“…The relationships for the calculation of thermodynamic properties are presented in the Appendix A, and the analytical expressions for the partial derivatives of the mixture Helmholtz energy had been given by Estela-Uribe and colleagues in [24]. For the calculation of isobaric heat capacities and speeds of sound, the following correlations for the perfect-gas isochoric heat capacity were used: Setzmann and Wagner [12] for methane, Estrada-Alexanders and Trusler [25] for ethane, Trusler and Zarari [26] for propane, Span et al [27] for nitrogen and Span and Wagner [28] for carbon dioxide.…”

An improved Helmholtz energy model for non-polar fluids and their mixtures. Part 1: Application to non-polar pure fluids

“…the correlations by Smukala et al [9] for ethylene, Span et al [6] for nitrogen, Span and Wagner [7] for carbon dioxide and Stewart et al [21] for oxygen. Another source of these correlations were those calculated from zero-density speeds of sound and reported by Estrada-Alexanders and Trusler [22] for ethane, Trusler and Zarari [23] for propane, Ewing and Goodwin [24] for isobutane, Ewing et al [25] for nbutane and Ewing et al [26] for n-pentane. Finally, correlations were fitted in this study to perfect-gas isobaric-heat-capacity data by Pitzer and Kilpatrick [27] for n-hexane, Stephan and Hildwein [28] for n-heptane, Hossenlopp and Scott [29] for n-octane, Dorofeeva et al [30] for cyclohexane, Todd et al [31] for benzene and Chao et al [32] for toluene.…”

An improved Helmholtz energy model for non-polar fluids and their mixtures. Part 3: Application to natural gases and related systems

“…Another set of correlations were those regressed from zero-density speeds of sound along isotherms, i.e. those by Estrada-Alexanders and Trusler [17] for ethane, Trusler and Zarari [18] for propane, Ewing and Goodwin [19] for i-butane, Ewing et al [20] for n-butane, Ewing and Goodwin for isopentane [21] and Ewing et al [22] for n-pentane. Finally, in the work of [1] correlations had been fitted to perfectgas isobaric-heat-capacity data by Pitzer and Kilpatrick [23] for n-hexane, Stephan and Hildwein [24] for n-heptane, Hossenlopp and Scott [25] for n-octane.…”

“…(1) and the square-well intermolecular potential coefficients ε ii /k B and ii of the coordination number model of Eq. (18). The mixture model binary interaction parameters are the unlike-interaction coefficient d ij of Eq.…”