QUESTION

A stream of $100$ kmol$/$h of ethanol $(50$ mol$\%)$ and n$-$propanol $(50$ mol$\%)$ at room temperature $(298$ K$)$ and atmospheric pressure

It is continuously fed to a distillation column. The pressure drop in the column is negligible and the rift rate for the column is $1\mathrm{.}5.$

used. As a result of the separation process, $93\%($mol$\%)$ ethanol and $5\%($mol$\%)$ n$-$propanol in the feed stream are

The distillate stream is required to leave the column.

a$)$ Set up a continuous distillation column simulation using $$Shortcut column$$ in ChemCad simulation software.

Number of racks, minimum number of racks, location of feed rack, minimum and calculated reflux rate, distillate and base

Find the molar flow rates of the currents $($kmol$/$hour$)$ and the thermal loads of the boiler and condenser $($kJ$/$h$).$

b$)$ For the same process conditions $($feed current, reflux rate$),$ change the parameters of the column you designed above $($number of shelves,

Set up an SCDS distillation column design using the location of the feed rack. Find the compositions of distillate and base streams $($kmol$/$hour$).$ Calculate the thermal loads $($kJ$/$h$)$ of the boiler and condenser. Assume the percentage recovery of ethanol is $93\%$ as in the question above and compare the percentage recovery of n$-$propanol with the previously calculated value in the same case.

Select K:UNIFAC, H:Peng$-$Robinson as thermodynamic model.