Example $12-3.$ Graphical analysis for more concentrated absorber

A gas stream is $90$mol$\%N_2$ and $10$mol$\%C{O}_2.$ We wish to absorb the $C{O}_2$ into water. The inlet

water is pure and is at $5C.$ Because of cooling coils, operation can be assumed to be isothermal.

Operation is at $10$atm. If the liquid flow rate is $1\mathrm{.}5$ times the minimum liquid flow rate, how many

equilibrium stages are required to absorb $92\%$ of the $C{O}_2?$ Choose a basis of $1mo\frac{l}{h}$ of entering gas.