$2\mathrm{.}7.$ Aniline is produced by the hydrogenation of nitrobenzene. A small amount of cyclo$-$hexylamine is produced as

a by$-$product. The reactions are:

$1.C_2{H}_{5}N{O}_2+3H_2{C}_6{H}_{5}N{H}_2+2H_{2}O$

$2.C_6{H}_{5}N{O}_2+6H_2{C}_6{H}_{11}N{H}_2+2H_{2}O$

Nitrobenzene is fed to the reactor as a vapor, with three times the stoichiometric quantity of hydrogen. The

conversion of the nitrobenzene to all products is $96\%,$ and the selectivity for aniline is $95\%.$

The unreacted hydrogen is separated from the reactor products and recycled to the reactor. A purge is taken

from the recycle stream to maintain the inerts in the recycle stream below $5\%.$ The fresh hydrogen feed is $99\mathrm{.}5\%$

pure, with the remainder being inerts. All percentages are molar.

For a feed rate of $100$kmo$\frac{l}{h}$ of nitrobenzene, calculate:

a$.$ The fresh hydrogen feed

b$.$ The purge rate required

c$.$ The composition of the reactor outlet stream

Use Pro$/$ll to simulate the textbook problem $2\mathrm{.}7.$ Assume feed

and hydrogen are available at $25F.$ Assume separation is done

with a flash drum at $50C.$ The conditions at the reactor is $200$

C & $7K\frac{G}{C}M2.$ Ignore pressure drops for this exercise.