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1 . 5 . In the manufacture of vinyl chloride ( VC ) by the pyrolysis of dichloroethane ( DCE ) , the reactor conversion

1.5. In the manufacture of vinyl chloride(VC) by the pyrolysis of dichloroethane (DCE), the reactor conversion is limited to 55% to reduce carbon formation, which fouls the reactor tubes.
Calculate the quantitiy of DCE fed to the reactor to produce 5000kgh of VC.
Solution
Basis: 5000kgh VC (the required quantity).
Reaction: C2H4Cl2C2H3Cl+HCl
mol weights DCE 99,VC62.5
kmolhVC produced =500062.5=80??
From the stoichiometric equation, 1kmol DCE produces 1kmol VC. Let x be DCE feed kmolh :
Per cent conversion =55=80x100
x=.800.55=145.5kmolh??
In this example the small loss of DCE to carbon and other products has been neglected. All the DCE reacted has been assumed to be converted to VC.
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