PLEASE ANSWER PART C

question 9 14 points A feed to a distillation column contains a mixture of n-butane, n-hexane and n-heptane at its boiling point and a pressure of 405 kPa. The feed flow rate is 150 mol/h. The feed is fractionated to recover 85 mol % of the n-butane in the distillate and 90 mol% of the n-hexane as the bottom product. The feed mol fractions of n-butane, n-hexane and n-heptane are 0.35, 0.35 and 0.3, respectively.

Calculate: a. The amount and composition of each component at the top (5 marks)

b. The amount and composition of cach component at the bottom (4 marks)

c. The minimum number of stages if the top and bottom temperatures are 75 C and 125 C, respectively. (5 marks)

Data: Distribution coefficients (K values) 75 C 125 C n-butane n-hexane 2.0 0.33 4.5 1.0 Save Answer

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