Question

In the absorption of a solute gas from a mixture containing inerts in a solvent, it has been observed that the overall gas transfer coefficient is nearly equal to the individual gas film transfer coefficient. It may therefore be concluded that:

• A. The process is liquid film controlled
• B. The gas is sparingly soluble in the solvent
• C. The transfer rate can be increased substantially by reducing the thickness of the liquid film
• D. The transfer rate can be increased substantially by reducing the thickness of the gas film

Hint:

Sparingly soluble gases often show gas-film control in absorption processes.

Answer 1

The Correct Option is B

When the overall gas transfer coefficient equals the gas film coefficient, it implies that the gas film controls the rate, which occurs when the gas has low solubility in the solvent.