A stripping column is designed to remove acetone from water using air. The incoming

composition of acetone in the water is $0\mathrm{.}4$mol$\%.$ The desired outlet purity is $0\mathrm{.}01\%.$

The column operates at a pressure of $1$atm and the Henry's law constant for acetone in

water is $1\mathrm{.}41$atm.

a$)$ Determine $(\frac{L}{V}{)}_{\underset{?}{lim}}.$

b$)$ Using the McCabe$-$Thiele method, find the number of stages required, if the column

operates at $V_{\text{a}\text{c}\text{t}\text{u}\text{a}\text{l}}=1\mathrm{.}2V_{\text{m}\text{i}\text{n}}.$ Comment on your solution for the number of stages

required.

c$)$ Use the Kremser equation to determine the number of stages required, using the

same operating conditions as in #$2.$