How do we go about this?

A chemical plant generates $2200kg$ mol$/\frac{?}{h}$ of flue gas containing $7$mol$\%$ pollutant $A(Y_A=0\mathrm{.}07)$ that

must be reduced to less than $0\mathrm{.}7$mol$\%(y_A=0\mathrm{.}007)$ before the gas can be released to the

atmosphere. You are asked to design a gas scrubber $($absorber$)$ to clean up the pollutant in the flue

gas by adsorption with pure water through countercurrent flow. The equilibrium data $($mol fraction of

$A$ in the liquid phase, $x_A$ and the gas phase, $Y_A)$ for this system is given in the phase diagram.

Answer the following three questions. $[$Note: You need to use the phase dlagram to answer the

questions.$]$

If the mole fraction of the pollutant $A$ in the flue gas is increased to $9$mol$\%,$ briefly discuss if and

how the effluent pollutant mole fraction may be affected and how you would modify the process

in order to control it to less than $0\mathrm{.}7$mol$\%(5$ pts$)$

What would be the mole fractions of $A$ in the exiting air $(y_A)$ and water $(x_A)$ if a column with $10$

equilibrium stages is used? $(15pts)[$Note: show clearly how to determine the mole fractions of

exiting air and water using the phase dlagram$]$

How would you modify the existing absorption process in order to further reduce the pollutant $A$

mole fraction in the flue gas from $0\mathrm{.}7$mol$\%$ to $0\mathrm{.}07$mol$\%?$ You need to give the process design

and indicate how many equilibrium stages would be required. $(10$ pts$)[$Note: The flue gas rate is

$2200$kgmol$\frac{e}{h}$ and the water rate is $4500kg$ mole$/$h$.]$

Phase diagram for solute$-$free mole fractions in the liquid phase $(x)$ and gas phase $(Y).$