Abstract
Volumetric properties of several low acentric factor fluids (Ar, CH 4, C 2H 6, Kr, N 2, Ne, O 2, Xe) as well as CO 2 are modeled using the Bender equation of state. This equation is a linear function of 19 adjustable parameters, which are evaluated from properties data, using a linear numerical procedure. The validity of the EOS is tested by calculating the Joule–Thomson inversion curve. A simple model is in particular used to correlate the inversion properties predicted by the Bender equation, expressed in term of reduced pressure as a function of reduced temperatures ranging from 0.8 to 6. The simple correlation reproduces accurately the used data. We employ data on state behaviour ρ ( P , T ) of homogeneous fluid phases, vapour–liquid equilibrium, second virial coefficient and the coordinates of the critical point.
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