P$4\mathrm{.}53$ Connie Chemist has developed a new catalyst for making acetaldehyde from ethanol and air. Besides the desired reaction, some

ethanol is oxidized completely to $C{O}_2$ and $H_{2}O.$ Connie analyzed a laboratory scale continuous$-$flow reactor. The feed to the

reactor is set at $5\mathrm{.}7$ moles ethanol per mole oxygen. Under these conditions, the single$-$pass conversion of ethanol is $25\%,$ with

selectivity to acetaldehyde of $0\mathrm{.}92.$ Sketch a block flow diagram showing how you would design this process at a large scale, to

produce $1200$kgmo$\frac{l}{h}$ acetaldehyde. Include recycle and purge streams as you see fit. Assume that nitrogen, oxygen and carbon

dioxide cannot be economically separated, and that ethanol, water, and acetaldehyde can all be readily separated from each other.

Complete a DOF analysis of the process. Calculate all flows.