1. What is Gas Phase Mass Transfer Coefficient?

Definition: The gas phase mass transfer coefficient is a diffusion rate constant that relates the mass transfer rate, mass transfer area, and concentration change as driving force.

Purpose: It quantifies how quickly a component can transfer from the gas phase to another phase (typically liquid) in mass transfer operations.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( k_y \) — Gas phase mass transfer coefficient (mol/(s·m²))
• \( K_y \) — Overall gas phase mass transfer coefficient (mol/(s·m²))
• \( FR_g \) — Fractional resistance offered by gas phase (dimensionless, 0-1)

Explanation: The overall mass transfer coefficient is divided by the fractional resistance offered by the gas phase to determine the gas phase mass transfer coefficient.

3. Importance of Gas Phase Mass Transfer Coefficient

Details: This coefficient is crucial in designing and analyzing gas-liquid contactors like absorption towers, strippers, and scrubbers.

4. Using the Calculator

Tips: Enter the overall gas phase mass transfer coefficient and the fractional resistance (between 0 and 1). All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is the typical range for gas phase mass transfer coefficients?
A: Values typically range from 0.01 to 1 mol/(s·m²), depending on the system and operating conditions.

Q2: How is fractional resistance determined?
A: It's the ratio of gas phase resistance to total resistance, often determined experimentally or from correlations.

Q3: What affects the gas phase mass transfer coefficient?
A: Factors include temperature, pressure, gas velocity, and the physical properties of the components.

Q4: Can the fractional resistance be zero?
A: No, it must be greater than zero and less than or equal to one.

Q5: What units should I use for inputs?
A: Use consistent units - mol/(s·m²) for mass transfer coefficients and dimensionless fraction for resistance.