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( 3 0 pts ) Vinyl chloride is used to make polyvinyl chloride, or PVC , a widely used plastic with many applications. As part

(30 pts) Vinyl chloride is used to make polyvinyl chloride, or PVC, a widely used plastic
with many applications. As part of the process to produce vinyl chloride, ethylene is
reacted with chlorine gas to produce 1,2-dichloroethane. 1,2-dichloroethane is then heated
to produce vinyl chloride. You are tasked with designing a flash drum to remove unreacted
ethylene from 1,2-dichloroethane before the heating step so the ethylene can be recycled to
the reactor. 90mols of a mixture of 86mol%1,2-dichloroethane (DCE) and 14mol%
ethylene (E) at 298.15K is to be flashed from 5 bar to 2 bar. The desired liquid composition
is 97mol%1,2-dichloroethane. Assume Raoult's Law applies (an ideal mixture).
Antione's Equation (log10) parameters are given below for P(?bar) and T(K).
a. Draw a process flow diagram (4 pts) and do a degree of freedom analysis (4 pts).
b. Calculate the temperature (K) of the flash drum and the molar flow rates
(mols) and compositions of the product streams analytically. (8pts)
i. Write out equations used to solve (4 pts) and specifications used in Excel
Solver (2 pts) to calculate the final answer.
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