Overall Gas Phase Mass Transfer Coefficient using Fractional Resistance by Gas Phase Calculator

Formula Used:

\[ K_y = k_y \times FR_g \]

Overall Gas Phase Mass Transfer Coefficient (K_y): mol/(s·m²)

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1. What is Overall Gas Phase Mass Transfer Coefficient?

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

Purpose: It helps chemical engineers determine the efficiency of mass transfer between gas and liquid phases in processes like absorption, stripping, and distillation.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ K_y = k_y \times FR_g \]

Where:

\( K_y \) — Overall Gas Phase Mass Transfer Coefficient (mol/(s·m²))
\( k_y \) — Gas Phase Mass Transfer Coefficient (mol/(s·m²))
\( FR_g \) — Fractional Resistance Offered by Gas Phase (dimensionless, 0-1)

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

3. Importance of Mass Transfer Coefficient Calculation

Details: Accurate calculation of mass transfer coefficients is crucial for designing efficient separation processes and reactors in chemical engineering.

4. Using the Calculator

Tips: Enter the gas phase mass transfer coefficient in mol/(s·m²) and the fractional resistance (between 0 and 1). The fractional resistance represents the proportion of total resistance attributed to the gas phase.

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 100 mol/(s·m²), depending on system conditions and properties.

Q2: How is fractional resistance determined?
A: It's calculated as the ratio of gas film resistance to total resistance (gas + liquid).

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

Q4: What's the difference between k_y and K_y?
A: k_y is the gas film coefficient, while K_y is the overall coefficient accounting for both phases.

Q5: Can this calculator be used for liquid phase calculations?
A: No, this is specifically for gas phase. For liquid phase, different coefficients and resistances apply.