The overall mass transfer co-efficient for the absorption of SO2 in air with dilute NaOH solution can be increased substantially by___________________?
Correct answer: A. Increasing the gas film co-efficient
- A. Increasing the gas film co-efficient
- B. Increasing the liquid film co-efficient
- C. Increasing the total pressure
- D. Decreasing the total pressure
Explanation
Dilute NaOH reacts rapidly with absorbed SO2, making liquid-film resistance very small and leaving gas-film resistance dominant. Increasing the gas-film coefficient therefore increases the overall coefficient substantially.
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