It is desired to fractionate a sub$-$cooled liquid mixture of ethanol$-$water solution in a

tray$-$type distillation column operating at $1$ atm. Liquid mixture is fed to the column

at a flow rate of $360$ kg$/$min containing $45$ mole$\%$ ethanol. An ethanol fraction of

$75$ mole$\%$ is desired to obtain at the top product, and $5$ mole$\%,$ at the bottom

product. Find,

a$)$ the percentage recovery of ethanol, $[6$ pts$.]$

b$)$ tM$2-$ CONTINUOUS DISTILLATION IN A PACKED BED COLUMN

It is desired to fractionate a sub$-$cooled liquid mixture of ethanol$-$water solution in a

tray$-$type distillation column operating at $1$atm. Liquid mixture is fed to the column

at a flow rate of $360k\frac{g}{m}in$ containing $45$mole$\%$ ethanol. An ethanol fraction of

$75$mole$\%$ is desired to obtain at the top product, and $5$mole$\%,$ at the bottom

product. Find,

a$)$ the percentage recovery of ethanol, $[6$ pts$.]$

b$)$ the reflux ratio, at which the column is operating, $[2$ pts$.]$

c$)$ the liquid $(\frac{?}{\text{b}\text{a}\text{r}}(L))$ and gas $(\frac{?}{\text{b}\text{a}\text{r}}(G))$ molar flow rates in the stripping section of the column,

and find the stripping section operating line equation of the column. $[5$ pts$.]$

d$)$ the number of ideal plates by using McCabe$-$Thiele Method. Show the enriching

section, stripping section, condenser and reboiler on the graph. $[7$ pts$.]$he reflux ratio, at which the column is operating, $[2$ pts$.]$

c$)$ the liquid $()$ and gas $()$ molar flow rates in the stripping section of the column,

and find the stripping section operating line equation of the column. $[5$ pts$.]$

d$)$ the number of ideal plates by using McCabe$-$Thiele Method. Show the enriching

section, stripping section, condenser and reboiler on the graph. $[7$ pts$.]$