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The Fractional Resistance Offered by Gas Phase is the ratio of resistance offered by the gas film in contact with the liquid phase to the overall gas phase mass transfer coefficient. It quantifies the proportion of total mass transfer resistance that occurs in the gas phase.
The calculator uses the formula:
Where:
Explanation: The formula calculates the ratio of the resistance in the gas phase to the total resistance in the mass transfer process.
Details: Understanding the fractional resistance helps in identifying which phase (gas or liquid) is controlling the mass transfer rate. This information is crucial for designing and optimizing mass transfer equipment like absorbers and strippers.
Tips: Enter the gas phase mass transfer coefficient and overall gas phase mass transfer coefficient in mol/s·m². Both values must be positive numbers greater than zero.
Q1: What does a high fractional resistance value indicate?
A: A high FRg value indicates that the gas phase offers significant resistance to mass transfer compared to the overall process.
Q2: What is the typical range for fractional resistance values?
A: Fractional resistance values typically range between 0 and 1, where 0 indicates no resistance from the gas phase and 1 indicates all resistance comes from the gas phase.
Q3: How is this calculation used in industrial applications?
A: This calculation helps engineers determine whether to focus on improving gas phase or liquid phase mass transfer characteristics in process optimization.
Q4: What factors affect the gas phase mass transfer coefficient?
A: Factors include gas velocity, temperature, pressure, gas properties (density, viscosity), and the nature of the gas-liquid interface.
Q5: Can this formula be used for any gas-liquid system?
A: Yes, this formula is generally applicable to most gas-liquid mass transfer systems, though specific conditions may require additional considerations.