# Question: countercurrent absorption tray columns 1 constructing operating and equilibrium...

###### Question details

(Counter-Current Absorption – Tray Columns)

1] Constructing Operating and Equilibrium Lines Using Solute
Free Basis: (25 points)

We want to recover solute A from an inert carrier gas B by
absorption into a solvent operating in a counter current absorption
column. The gas B entering into the absorber flows at a rate of 500
kmol/h with yA = 0.3 and leaves the absorber with yA = 0.01.
Solvent enters the absorber at the rate of 1500 kmol/h with xA =
0.001.

The equilibrium relationship is yA = 2.8 xA.

The carrier gas may be considered insoluble in the solvent and the solvent may be considered nonvolatile.

Construct the x-y plots for the equilibrium and operating lines using both mole fraction (x,y) and solute-free concentrations (X,Y) – one plot showing the equilibrium and operating lines with x, y and the other plot showing the same lines as a function of X, Y. Show the steps involved in converting mole fractions (x, y) to solute-free concentrations (X, Y). Plot the corresponding equilibrium and operating lines using a software of your choice (EXCEL, MATLAB, MATHCAD etc.)