R. Solimando et al., MODIFYING THE PENG ROBINSON EQUATION FOR A HOMOGENEOUS REPRESENTATIONOF PURE FLUID PVT PROPERTIES, Fluid phase equilibria, 106(1-2), 1995, pp. 59-80
Peng-Robinson volume corrected equation was modified to yield homogene
ous representation of PVT properties of pure fluids. A correcting term
which significantly contributes only in the vicinity of the critical
point was added. The resulting equation is not cubic any longer but pr
eserves general characteristics of cubic EOS far from the critical poi
nt and yields, at the same time, very satisfactory representation of n
ear critical fluid properties.