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

Name TDE.Peng-Robinson. EOS
CommentOriginal Peng-Robinson EOS with 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 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 + (1 - Tr1/2)× m]2
m = -0.26992×ω2 + 1.54226 ×ω + 0.37464
Tr = T/Tc
Physical molar volume is obtained from the Peng-Robinson volume by adding VT.