10. Overall Mass Transfer Coefficient
The chapter outlines the principles of mass transfer across interfaces and defines mass transfer coefficients, emphasizing the significance of concentration gradients in mass transfer dynamics. It introduces the concept of resistance in series, demonstrating how individual resistances in different phases affect overall mass transfer rates. The chapter concludes by discussing the need to estimate mass transfer coefficients and analyze their impact on environmental situations.
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What we have learnt
- Mass transfer occurs across interfaces, and coefficients can differ between phases.
- Concentration gradients drive mass transfer and influence the resistance encountered.
- Overall mass transfer resistance is calculated using individual phase resistances.
Key Concepts
- -- Mass Transfer Coefficient
- A proportionality constant that quantifies the rate of mass transfer between phases; it varies between liquid and gas phases.
- -- Resistance in Series
- A methodological approach to calculate overall mass transfer resistance by summing individual resistances in different phases.
- -- Henry's Constant
- A constant that relates the concentrations of a solute in two different phases at equilibrium.
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