💨 Compressibility Factor (Z) Calculator

Compute Z via Pitzer correlation, van der Waals, and Peng-Robinson EOS for real gases.

📝 Configuration

🧪 Gas Selection
🌡️ Conditions
Key Equations:
Pitzer: Z=1+(B₀+ωB₁)Pr/Tr
VdW: Z³-(1+B')Z²+A'Z-A'B'=0
PR: Z³-(1-B)Z²+(A-3B²-2B)Z-(AB-B²-B³)=0

📊 Results

Configure inputs and click Compute.

📘 Methodology

Pitzer Correlation

Z = 1 + (B₀+ωB₁)Pr/Tr where B₀ = 0.083−0.422/Tr^1.6 and B₁ = 0.139−0.172/Tr^4.2. Valid at low to moderate pressures.

Van der Waals

Cubic EOS with a = 27R²Tc²/(64Pc) and b = RTc/(8Pc). Simple but less accurate at high pressures.

Peng-Robinson

Most widely used cubic EOS. Uses α(T) function with κ = 0.37464+1.54226ω−0.26992ω². Superior near critical point.