1. What is Overall Liquid Phase Mass Transfer Coefficient?

Definition: The Overall Liquid Phase Mass Transfer Coefficient accounts for overall driving force for both the phases in contact in terms of Liquid Phase Mass transfer.

Purpose: It helps chemical engineers determine the efficiency of mass transfer in liquid-gas systems.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( K_x \) — Overall Liquid Phase Mass Transfer Coefficient (mol/(s·m²))
• \( k_x \) — Liquid Phase Mass Transfer Coefficient (mol/(s·m²))
• \( FR_l \) — Fractional Resistance Offered by Liquid Phase (dimensionless, 0-1)

Explanation: The liquid phase mass transfer coefficient is multiplied by the fractional resistance offered by the liquid phase to get the overall coefficient.

3. Importance of Mass Transfer Coefficient Calculation

Details: Proper calculation of mass transfer coefficients is crucial for designing efficient separation processes like absorption, distillation, and extraction.

4. Using the Calculator

Tips: Enter the liquid phase mass transfer coefficient and fractional resistance (between 0 and 1). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is the physical meaning of fractional resistance?
A: It represents the proportion of total resistance to mass transfer that occurs in the liquid phase.

Q2: What's a typical range for liquid phase mass transfer coefficients?
A: Values typically range from 0.001 to 0.1 mol/(s·m²) depending on the system and conditions.

Q3: When would the fractional resistance be close to 1?
A: When nearly all mass transfer resistance is in the liquid phase (gas phase resistance is negligible).

Q4: How is this different from overall gas phase coefficient?
A: This focuses on liquid phase resistance, while gas phase coefficient would consider resistance in the gas film.

Q5: Can this be used for packed columns?
A: Yes, but you may need to adjust for specific packing characteristics and flow regimes.