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Introduction

## Publications

Publications (7)

In the last two centuries, equations of state (EoS) have become a key tool for the correlation and prediction of thermodynamic properties of fluids. They can be applied not only to pure substances as well as to mixtures but they also constitute the heart of commercially available computer-aided-process-design software. In the last twenty years, tho...

The suitability of different combinations of property data among vapor-pressure (Psat), enthalpy of vaporization (ΔvapH) and saturated-liquid heat-capacity (cP,liqsat) data for fitting consistent Twu α-function parameters is evaluated. A given combination is declared to be suitable if the obtained fitted parameters produce acceptable predictions fo...

Since Van der Waals, the attractive term of any cubic equation of state is expressed as the product of its value at the critical temperature ( ) by the so-called alpha function. Our recent investigations made it however possible to conclude that to get accurate and physically meaningful behaviors in both the subcritical and supercritical domains, i...

In this paper, translated and consistent versions of the Peng-Robinson (tc-PR) and Redlich-Kwong (tc-RK) cubic equations of state (CEoS) are developed. The adjective consistent means that the α-function used in such models passes the consistency test we recently developed and which guarantees safe extrapolation in the supercritical region and safe...

In a previous work, we showed that the incorporation of a temperature-dependent volume-translation parameter in an equation of state for pure components alters necessarily the prediction of 1-phase and 2-phase properties. On the contrary, if a temperature-independent volume translation parameter is used, most of the 1-phase and 2-phase properties a...

This study highlights that α-functions used in cubic equations of state must be of class C2 i.e. that their first and second derivatives must exist and must be continuous, positive , monotonically decreasing , convex and also verify , for any value of the temperature T. Our proposed “consistency test for α-functions” gathers all these conditions. T...

Since the pioneering work of Professor André Péneloux, volume translations are often applied to cubic equations of state with the aim of improving the description of volumetric properties. Such translations are either constant or temperature-dependent. In any case, it is well-known that both the translated and untranslated models return the same va...

## Questions

Questions (2)

The Kirkwood-Fröhlich for a pure compound is generally used to estimate the polarization effects of a molecule on its closest neighbours. Applying it to Propylene, I found a

*g*factor (correlation factor) above 4 which, surprisingly, should indicate high polarization effects. This high value of*g*is caused by the presence of the small dipolar moment value (0.14 Debye) at the denominator of the Kirkwood-Fröhlich equation.Am I dealing with a discontinuity problem when the dipolar moment of the molecule tends to 0 ?

It is often stated that a Bancroft point necessarily induces azeotropy. Is it always true or does any one found a counter-exemple ?