Peng-Robinson Equation of State (with Volume Translation): DETAILS
| Name | TDE.Peng-Robinson. EOS |
|---|---|
| Comment | Original Peng-Robinson EOS with constant-term volume translation |
| Variable VDN | Density |
| Variable T | Temperature |
| Variable P | Pressure |
| Intermediate V | Molar volume |
| Intermediate Z | Compressibility factor |
| Parameter TC | Critical temperature |
| Parameter PC | Critical pressure |
| Parameter AF | Acentric factor |
| Parameter VT | Volume 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.