Evaluate the ratio lsgsactual to lsgsminimum-nbsp evaluate

Question

A tower, 15 cm in diameter, is to be used to lower the ammonia, NH₃, concentration in a gas stream from 3.6 to 0.3 mol %. Water is fed to the top of the tower at a rate of 14.5 mol/s and the gas stream is fed to the bottom at a rate of 8 mol/s.

The tower operates isothermally at 293 K and 1.013 × 10⁵ Pa. The overall mass-transfer capacity coefficient, KY a, may be assumed to equal 71 mol/m².s: D_YA. The equilibrium data at 293 K are as follows:

Evaluate

a. the ratio (Ls/Gs)_actual to (Ls/Gs)_minimum.

b. the height of tower required, by graphical integration.