Mathias-Copeman Peng-Robinson Equation of State (with Volume Translation): DETAILS

Name TDE.Mathias-Copeman-Peng-Robinson. EOS
CommentPR-EOS with Mathias-Copeman alpha function and constant-term volume translation
Variable VDNDensity
Variable TTemperature
Variable PPressure
Intermediate VMolar volume
Intermediate ZCompressibility factor
Parameter TCCritical temperature
Parameter PCCritical pressure
Parameter AFAcentric factor
Parameter cArray (1 to 3)
Parameter VTVolume translation

Z = p×V/(R×T) Z = V/(V - b) - {a×α(T)×V}/{(R×T)×(V2 + 2×b×V - b2)}

a = (0.45724×(R×Tc)2)/pc

b = (0.0778×R×Tc)/pc

α(T) = [1 + Σci×(1 - Tr1/2)i]2 where the summation is over i = 1 to 3.

Tr = T/Tc

The physical molar volume is obtained from the Peng-Robinson volume by adding VT.