1. What is Saturated Pressure using Poynting Factor?

Definition: This calculator determines the saturated pressure of a substance using its liquid phase fugacity, saturated fugacity coefficient, and Poynting factor.

Purpose: It helps in thermodynamic calculations for phase equilibrium studies, particularly in chemical engineering applications.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P_{sat} \) — Saturated pressure (Pascal)
• \( f_l \) — Fugacity of liquid phase species (Pascal)
• \( \phi_{sat} \) — Saturated fugacity coefficient of species
• \( P.F. \) — Poynting factor

Explanation: The fugacity of the liquid phase is divided by the product of the saturated fugacity coefficient and Poynting factor to obtain the saturated pressure.

3. Importance of Saturated Pressure Calculation

Details: Accurate saturated pressure calculations are crucial for designing distillation columns, phase equilibrium studies, and predicting vapor-liquid equilibrium conditions.

4. Using the Calculator

Tips: Enter the fugacity of liquid phase species in Pascals, saturated fugacity coefficient, and Poynting factor. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is the Poynting factor?
A: The Poynting factor accounts for the change in fugacity as pressure changes from saturated pressure to system pressure at constant temperature.

Q2: How do I determine the fugacity of liquid phase?
A: Fugacity can be calculated from experimental data or estimated using thermodynamic models like the Peng-Robinson equation of state.

Q3: What's a typical value for saturated fugacity coefficient?
A: The coefficient typically ranges between 0 and 1, with values closer to 1 for ideal systems.

Q4: When is this calculation most useful?
A: This is particularly useful for high-pressure systems where non-ideal behavior is significant.

Q5: What units should be used for inputs?
A: Fugacity should be in Pascals, while the coefficient and Poynting factor are dimensionless.