Calculation of the Joule–Thomson inversion curves from cubic equations of state

In this paper the Joule–Thomson (JT) inversion curve has been used to test the predictive capabilities of some recent cubic equations of state. The three and two parameter cubic equations of state included modified Patel–Teja (MPT), modified Peng–Robinson (MPR) by Melhem–Saini–Goodwin, Iwai–Margerum–Lu (IML), modified Redlich–Kwong (MRK) by Souahi–Sator–Albane–Kies–Chitoure and the four parameter Trebble–Bishnoi (TB) equation of state were chosen for our study. All of the equations studied here except MRK have been given good prediction of the low-temperature branch of the JT inversion curve. In the high-temperature region and the peak of the curves depend on components the MPR, MPT and TB equations provided relatively fair agreement with experimental data and Gunn, Chueh and Prausnitz (GCP) correlated inversion curve. We considered the effect of the constants in α function of the MPT equation of state, in its ability of the prediction of the JT inversion curve. The consequence of volumetric parameter on the high pressure and relatively high temperature region has been shown. Isenthalp calculation has also been included.