1. What is Saturated Pressure in Gamma-Phi Formulation?

Definition: Saturated Pressure in Gamma-Phi Formulation is the pressure at which a given liquid and its vapour can co-exist in equilibrium at a given temperature.

Purpose: This calculation is essential in chemical engineering for vapor-liquid equilibrium calculations and phase behavior predictions.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P_{sat} \) — Saturated pressure (Pascal)
• \( K \) — K-value (vapor-liquid equilibrium ratio)
• \( \phi \) — Fugacity coefficient
• \( P_T \) — Total system pressure (Pascal)
• \( \gamma \) — Activity coefficient

Explanation: The formula accounts for non-ideal behavior in mixtures using the activity coefficient (γ) and fugacity coefficient (φ).

3. Importance of Saturated Pressure Calculation

Details: Accurate saturated pressure calculations are crucial for designing distillation columns, flash drums, and other separation processes.

4. Using the Calculator

Tips: Enter the K-value, fugacity coefficient, total pressure, and activity coefficient. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is the K-value in this context?
A: The K-value is the ratio of vapor-phase mole fraction to liquid-phase mole fraction at equilibrium.

Q2: When would I need to calculate saturated pressure?
A: This calculation is needed for phase equilibrium studies, process design, and when working with non-ideal mixtures.

Q3: What's a typical range for fugacity coefficients?
A: Fugacity coefficients typically range from 0 to 1 for most systems at moderate pressures.

Q4: How does temperature affect this calculation?
A: Temperature affects all parameters (K-value, φ, γ) but isn't directly in this formula. Use temperature-dependent correlations for these parameters.

Q5: Can I use this for ideal mixtures?
A: For ideal mixtures, γ = 1 and φ = 1, simplifying the calculation to P_sat = K × P_T.