Question: For the conditions of Exercise 9.7, with bubble-point liquid feed at column pressure, compute the minimum external reflux and nonkey distribution at Rmin by the

For the conditions of Exercise 9.7, with bubble-point liquid feed at column pressure, compute the minimum external reflux and nonkey distribution at Rmin by the Class 2 Underwood equations.

Data From Exercise 9.7

For the distillation in Figure 9.23, calculate N_minand the distribution of the nonkey components by the Fenske equation, using Figures 2.4 and 2.5 for K-values.

C3 iCa nC4 iC5 nC nC6 kmol/h 2,500 400 600 100 200

C3 iCa nC4 iC5 nC nC6 kmol/h 2,500 400 600 100 200 40 50 40 700 kPa nC7 nCg Figure 9.23 Data for Exercise 9.7. HK iC5 15 kmol/h LK C 6 kmol/h

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