For the following problem, $1)$ diagram the waste heat boiler and separation units $($with the separation units combined as a single unit$)$ and $2)$ indicate potential uses of exiting streams from these units. Formaldehyde is produced by decomposing methanol over a silver catalyst: $CH3OH$ OCHO $+H2.$ To provide heat for this endothermic reaction, some oxygen is included in the feed to the reactor, leading to the partial combustion of the hydrogen produced in the methanol decomposition. The feed to an adiabatic formaldehyde production reactor is obtained by bubbling a stream of air at $1$atm through liquid methanol. To avoid deactivating the catalyst, the maximum temperature attained in the reactor must be limited to $600C.$ For this purpose, saturated steam at $145C$ is metered into the air$-$methanol stream, and the combined stream enters the reactor. A fractional methanol conversion of $70\mathrm{.}0\%$ is achieved in the reactor, and the product gas contains $5\mathrm{.}00$ mole$\%$ hydrogen. The product gas is cooled to $145C$ in a waste heat boiler in which saturated steam at $3\mathrm{.}1$ bar is generated from liquid water at $30C.$ Several absorption and distillation units follow the waste heat boiler, and formaldehyde is ultimately recovered in an aqueous solution containing $37\mathrm{.}0wt\%$HCHO. $(15$ points$)$