Use your solution from Problem $1$ to help you design a stripper that accomplishes the following

separation. $99\%$ of the sulfur dioxide present in a liquid absorbent is to be counter$-$currently

stripped out with initially pure air. The $S{O}_2$ is present in the liquid feed at $3$mol$\%,$ which may be

regarded as dilute. The liquid flux is $8{10}^{-4}molc{m}^{-2}se{c}^{-1},$ and the air flux is $1\mathrm{.}6{10}^{-3}molc{m}^{-2}$

$se{c}^{-1}.$ The stripping is to be carried out in a tower filled with $1$ in Raschig rings for which $a=$

$190\mathrm{.}2m^{-1}$; in this tower, $k_x$ is $5\mathrm{.}0{10}^{-6}molc{m}^{-2}se{c}^{-1}$ and $k_G$ is $1\mathrm{.}2cmse{c}^{-1}.$ The value of $H,$ the

Henry's Law constant, is $6\mathrm{.}0$atm at the temperature and pressure used and $\{$:$2(atm)).$

How tall does this tower need to be to accomplish the desired separation?