$10\mathrm{.}6-3$ using $1\mathrm{.}3L_{\text{m}\text{i}\text{n}}^{\text{'}},$

trays needed for Example

Absorption of Ammonia in a Tray Tower. A tray tower is to be used

to remove $99\%$ of the ammonia from an entering air stream con$-$

taining $6$mol$\%$ ammonia at $293K$ and $1\mathrm{.}013{10}^{5}Pa.$ The entering

pure water flow rate is $188kgH{H}_{2}O*h*m^2$ and the inert air flow is $128$

$kg$ air$/$h $*m^2.$ Calculate the number of theoretical trays needed. Use

equilibrium data from Appendix A$\mathrm{.}3.$ For the dilute end of the tower,

plot an expanded diagram to step off the number of trays more ac$-$

curately.

Ans. $y_1=0\mathrm{.}000639($exit$),x_N=0\mathrm{.}0260($exit$),3\mathrm{.}8$ theoretical trays