Problem Statement

Cyclohexane $)$ can be made by the reaction of benzene $(Bz,$ short for $C_6{H}_6)$ with hydrogen according to the following reaction:

$C_6{H}_6+3H_2{C}_6{H}_{12}$

For the process shown in Figure E$5\mathrm{.}7,$ determine the ratio of the recycle stream to the fresh feed stream if the overall conversion of benzene is $95\%$ and the singlepass conversion through the reactor is $20\%.$ Assume that $20\%$ excess hydrogen is used in the fresh feed, and that the composition of the recycle stream is $22\mathrm{.}74$mol $\%$ benzene and $78\mathrm{.}26$mol$\%$ hydrogen.

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