General Rate Equation Formula:
From: | To: |
Definition: This equation calculates the overall rate of mass transfer in gas-liquid systems considering resistances in both phases and chemical reaction.
Purpose: It helps chemical engineers design and analyze gas-liquid contactors like absorbers, strippers, and reactors.
The calculator uses the formula:
Where:
Explanation: The equation combines resistances from gas film, liquid film, and chemical reaction to determine the overall mass transfer rate.
Details: Accurate rate calculation is crucial for designing efficient contactors, optimizing reaction conditions, and predicting system performance.
Tips: Enter all required parameters with appropriate units. Default values are provided for reference. All values must be positive.
Q1: What is the physical meaning of the enhancement factor (E)?
A: The enhancement factor accounts for how chemical reaction increases the mass transfer rate beyond pure physical absorption.
Q2: How do I determine the interfacial area (a)?
A: This depends on the contactor type and can be estimated from equipment specifications or correlations.
Q3: When can I neglect the reaction term in the denominator?
A: When the reaction is very fast compared to mass transfer (k → ∞), the reaction term becomes negligible.
Q4: What's a typical range for Henry's law constant?
A: HA varies widely (10-5 to 103 mol/(m³·Pa)) depending on the gas and solvent.
Q5: How does temperature affect the calculation?
A: Temperature affects kAg, kAl, HA, and k. Use values appropriate for your operating temperature.