Q$4.(10$ Marks$)CO1,CO2,CO3,CO4$

Consider a condensation process for recovering acetone from air$-$acetone stream $($acetone $=10\mathrm{.}3mo\frac{l}{h}$

and air $=687mo\frac{l}{h}).$ The air$-$acetone stream is available at ambient conditions $(77F$ and $1$atm $).$ Two

alternatives of condensation process are given below:

Alternative$-1$

The condensation process operates at $15$ psia to recover $99\mathrm{.}5\%$ of acetone.

Alternative$-2$

The condensation process operates at $113F$ to recover $99\mathrm{.}5\%$ of acetone.

a$)$ Propose a flowsheet for the acetone recovery process $($for both alternatives$).$

b$)$ What temperature would be maintained in Alternative$-1?$

c$)$ What pressure would be required in Alternative$-2?$

d$)$ Describe the economic trade$-$offs involved in the design of the condensation process for both

alternatives.

The coefficient values for acetone used in appropriate equation are $A=16\mathrm{.}6513,B=2940\mathrm{.}46,C=-$

$35\mathrm{.}93($when vapor pressure and temperature are given in $mmHg$ and $K,$ respectively$).$