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1. The product of a fermentation reactor contains ethanol with amass fraction of 0.08. You want to distill this product in orderto make a product in such manner that the distillate shouldhave 50% (mass basis) alcohol. The residue left in the distillercontains 3% alcohola) Draw a flow chart for the process providing known valuesand unknown variables.b) How many degrees of freedom does the system have?c) Assuming as basis of calculation 1 Kg of the fermentedmaterial. What mass of distillate can you obtain under theseconditions?

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1. The product of a fermentation reactor contains ethanol with a
mass fraction of 0.08. You want to distill this product in order
to make a product in such manner that the distillate should
have 50% (mass basis) alcohol. The residue left in the distiller
contains 3% alcohol
a) Draw a flow chart for the process providing known values
and unknown variables.
b) How many degrees of freedom does the system have?
c) Assuming as basis of calculation 1 Kg of the fermented
material. What mass of distillate can you obtain under these
conditions?
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1. The product of a fermentation reactor contains ethanol with a mass fraction of 0.08. You want to distill this product in order to make a product in such manner that the distillate should have 50% (mass basis) alcohol. The residue left in the distiller contains 3% alcohol a) Draw a flow chart for the process providing known values and unknown variables. b) How many degrees of freedom does the system have? c) Assuming as basis of calculation 1 Kg of the fermented material. What mass of distillate can you obtain under these conditions?

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Step 1

Part (a)

Let the mass of the fermenter products be mF kg which is fed to the distiller to produce mD kg of distillate and mR kg of residue.

The feed to the distiller contains 0.08 mass fraction of ethanol represented by ‘E’ and balance substance ‘A’.

In the distillate, ethanol present is 50% and in residue, it is 3%.

The flowchart representing this process is drawn below as:

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Step 2

Part (b)

The formula used to calculate degree of freedom (DF) is written below.

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Step 3

There are total 3 unknown variables present. These are, mF, mD, and mR.

There are 2 independent equations, one for each ...

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