Gas Film Transfer Coefficient Formula:
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Definition: The Gas Film Transfer Coefficient defines the rate at which a component of a gas mixture transfers from the bulk gas phase to the surface of a liquid or solid phase.
Purpose: It's crucial in designing and analyzing mass transfer operations in chemical engineering processes like absorption, distillation, and stripping.
The calculator uses the formula:
Where:
Explanation: The column performance multiplied by molar gas flowrate gives the mass transfer driving force, which when divided by interfacial area gives the transfer coefficient.
Details: Accurate calculation helps in designing efficient mass transfer equipment, optimizing process conditions, and predicting separation performance.
Tips: Enter column performance (dimensionless), molar gas flowrate in mol/s·m², and interfacial area per volume in m²/m³. All values must be > 0.
Q1: What is typical range for gas film transfer coefficients?
A: Typically ranges from 0.01 to 10 mol/s·m² depending on system and conditions.
Q2: How is column performance determined?
A: It's experimentally determined or calculated from mass transfer correlations.
Q3: What affects interfacial area per volume?
A: Packing type, size, liquid flow rate, and physical properties of the fluids.
Q4: When would I need this calculation?
A: When designing or analyzing packed columns for gas-liquid mass transfer operations.
Q5: How does temperature affect the coefficient?
A: Higher temperatures generally increase the coefficient due to increased molecular motion.