Reaction Rate Formula:
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Definition: This calculator determines the reaction rate based on surface area for gas film mass transfer using the partial pressure difference.
Purpose: It helps chemical engineers calculate the mass transfer rate in gas-liquid systems when considering the surface area of the contactor.
The calculator uses the formula:
Where:
Explanation: The reaction rate is proportional to the mass transfer coefficient and the driving force (partial pressure difference).
Details: Accurate reaction rate calculation is crucial for designing chemical reactors, predicting reaction outcomes, and optimizing process conditions.
Tips: Enter the gas phase mass transfer coefficient, partial pressures of reactant A in bulk and at interface. All values must be positive, with pA ≥ pAi.
Q1: What is the physical meaning of kAg?
A: The gas phase mass transfer coefficient represents how easily a component moves from the gas bulk to the gas-liquid interface.
Q2: How is pAi determined experimentally?
A: It's typically determined at equilibrium conditions or measured using specialized interfacial sensors.
Q3: What factors affect kAg?
A: Temperature, pressure, gas velocity, system geometry, and physical properties of the gas all influence kAg.
Q4: When would pA equal pAi?
A: At equilibrium conditions, when there's no driving force for mass transfer.
Q5: Can this equation be used for liquid films?
A: No, this specific equation is for gas films. Liquid films would use concentrations rather than partial pressures.