Formula Used:
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Definition: This equation calculates the overall reaction rate based on the volume of contactor for straight mass transfer through the gas film.
Purpose: It helps chemical engineers determine the reaction rate in gas-liquid systems where mass transfer is occurring.
The calculator uses the formula:
Where:
Explanation: The negative sign indicates the reactant is being consumed. The rate depends on the mass transfer coefficient, available interfacial area, and the driving force (partial pressure difference).
Details: Accurate reaction rate calculation is crucial for designing reactors, predicting conversion rates, and optimizing chemical processes.
Tips: Enter all required parameters with appropriate units. The gas phase MTC and interfacial area must be positive values.
Q1: What does a negative reaction rate mean?
A: The negative sign indicates reactant consumption. The absolute value represents the rate of disappearance of reactant A.
Q2: How do I determine the gas phase MTC (kAg)?
A: It can be determined experimentally or estimated using correlations based on system properties and operating conditions.
Q3: What affects the interfacial area (a)?
A: It depends on the contactor design, gas-liquid flow rates, and physical properties of the fluids.
Q4: When would pA equal pAi?
A: This occurs at equilibrium when there's no driving force for mass transfer, resulting in zero reaction rate.
Q5: Can this be used for liquid film control?
A: No, this equation specifically applies to gas film controlled systems. A different equation would be needed for liquid film control.