$C_2{H}_{5}Cl($chloroethane $CCl2$ in HYSYS$)$ can be produced by the gas$-$phase reaction of $HCl$ with $C_2{H}_4($Ethylene$)$ over a copper chloride catalyst supported on silica as:

$C_2{H}_4+HCl{C}_2{H}_{5}Cl$

The feed stream consists of $50$mol$\%HCl,48$mol$\%C2H4,$ and $2$mol$\%N_2$ at $100$kgmo$\frac{l}{h}r.$ The feed conditions are $25oC$ a and $1$atm. Since the reaction achieves only $90$mol$\%$ conversion, the product is separated from the unreacted components, and the latter is recycled. The process takes place under atmospheric conditions, and any pressure drops are ignored. To prevent the accumulation of inerts in the system, $5\%$ is withdrawn by a purge stream. Show the effect of the flow rate of the purge stream on the recycle and on the composition of the reactor feed