QUESTION $1$ Answer BOTH parts $($a$)$ and $($b$)$

In Tutorial $2$ Question $3,$ a chemical absorption column was designed to absorb $H_{2}S($reactant A$)$ using MEA $($reactant B$).$ The mole ratios of A at the inlet and outlet of the column were $3\mathrm{.}57{10}^{-3}$ and $1\mathrm{.}0{10}^{-3}$ respectively while the concentration of MEA at the inlet was $250mo\frac{l}{m^3}.$

Data:

$k_{\text{g}\text{A}\text{A}}=60mo\frac{l}{m^2(s)(atm)},kLA=0\mathrm{.}03s^{-1}$

$H_A={10}^{-4}\frac{m^3(atm)}{m}ol,\frac{D_B}{D_A}=0\mathrm{.}64$

$P_T=20$atm,$C_T=56000mo\frac{l}{m^3},G=1000mo\frac{l}{m^2(s)}$

$($a$)$ Determine the $($L$/$G$)$ ratio which can be applied if the chemical absorption column is to be operated with a complete Surface Reaction Zone and a complete Interior Reaction Zone.

$($b$)$ Hence, calculate the height of the chemical absorption column required.