aAn absorption operation is required to remove $C{O}_2$ from a $250$kmo$\frac{l}{h}r$ flue gas stream using an aqueous $20$mole$\%$

monoethanolamine $($MEA$)$ solution supplied at a flow rate of $1\mathrm{.}5$ times the minimum. The gas feed contains $13$mole$\%$

$C{O}_2$ in air, and the exhaust gas stream should contain no more than $0\mathrm{.}7$mole$\%C{O}_2.$ The MEA solution is to be supplied

from a regeneration column and contains $1\mathrm{.}1$mole$\%C{O}_2.$ This absorption operation is to be carried out in an existing

column with internal height and diameter of $10$ and $1m,$ respectively. Packing in the form of ceramic berl saddles are

available in sizes from $0\mathrm{.}5$ to $1\mathrm{.}5$ inches, the column should be designed for a pressure drop of $0\mathrm{.}5$ inches $H_{2}O$ per foot

of packing. Assume that sufficient cooling is supplied for the column to be nearly isothermal $($note that in practice this

is not usually done$).$

a$)$ Discuss the suitability of this solvent for this operation, stating what factors may influence your choice of

solvent.

b$)$ Determine the mole $\%C{O}_2$ in the liquid stream leaving the column and determine the number of transfer units.

c$)$ Evaluate the height and diameter of the column required for each choice of packing.

d$)$ Discuss the suitability of each packing size for this operation and select one of these packing sizes, stating your

reasoning.

e$)$ Sketch the column arrangement, providing justification for this arrangement.

Marks for clear and professional presentation of your work $($pro rata of the marks awarded in a$-$e$)[10\%]$

Equilibrium data:

Packing data:

Other data:

$M_{\text{s}\text{o}\text{l}\text{v}\text{e}\text{n}\text{t}}=26\mathrm{.}6,M_{CO2}=44g*mo{l}^{-1},k_{OG}=0\mathrm{.}85$mol$*m^{-2}*s^{-1},{}_{g.\text{a}\text{v}\text{e}\text{.}}=1\mathrm{.}28kg*m^{-3},{}_{l,\text{a}\text{v}\text{e}\text{.}}=1000kg*m^{-3},{}_{\text{a}\text{v}\text{e}\text{.}}=1\mathrm{.}0cSt$

Please answer part b c e $,$ the previous expert didn't explain it well