A binary liquid solution containing components 1 and 2 are non-ideal mixture that follows Wilson correlation below:

where 𝐴12 and 𝐴21 are the binary interaction parameters (𝐴12 = 0.801 and 𝐴21 = 0.638).

The experimental data of the vapor pressure of components 1 and 2 are given the Table below:

Component 1 Component 2
T (oC) Vapor Pressure (bar) T (oC) Vapor Pressure (bar)
4.08 0.130 5.00 0.055
9.91 0.155 10.00 0.075
15.79 0.203 15.00 0.098
20.00 0.244 20.00 0.130
25.00 0.303 25.00 0.168
30.00 0.376 30.00 0.217
35.00 0.459 35.00 0.279
41.53 0.581 40.00 0.349
45.00 0.676 45.00 0.445
50.20 0.819 50.00 0.548
55.07 0.943 55.00 0.688
60.58 1.137 60.00 0.845
65.8 1.366 64.50 1.012

A rectification column will be used to purify component 1 from 5000 kmol/h of feed stream containing 30 mol% of component 1. In the case of the formation of azeotrope mixture, the maximum purity that can be practically achieved for either component 1 or 2 is 85% of the azeotropic composition.

  1. Supposed that you are given a choice to operate the column at 0.5 atm, 1 atm or 10 atm, which operating pressure would you choose? Briefly justify and support your answer with the necessary
  2. Based on your answer in question a), what is the purity of component 1 that can be obtained from this separation?
  3. Determine the number of theoretical stages required to achieve the purity in question b) to generate 1000 kmol/h of top product.
  4. A pre-existing stripping column that has 5 equilibrium stages will be added in series after the first rectification column to further purify component 1 to obtain 96 mol% of component

1. What will be your choice of the operating pressure for the stripping column (refer to pressure choices in question a)? Briefly justify your answer. Determine the top product flow rate that can be drawn from the stripping column.

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