Question

A sieve-tray tower is being designed for a gas absorption process. The entering gas contain 1.8% (molar) of A, the component to be absorbed. The gas should leave the tower containing 0.1% (molar) of A. The liquid to be used as absorbent initially contains 0.01% (molar) of A. The system obeys Henry’s law with m = yi / xi = 1.41. At the bottom of the tower, the molar liquid-to-gas ratio is 2.115, while at the other extreme it is 2.326. For these conditions, it has been found that the Murphree efficiency is constant at 0.65. Estimate the number of trays required.

Answer 1