Question: helpz [12 marks] A distillation column is used to separate light hydrocarbons (a mixture of C., Cs, C. from C and C) in product steams

helpz
helpz [12 marks] A distillation column is used to separate light hydrocarbons

[12 marks] A distillation column is used to separate light hydrocarbons (a mixture of C., Cs, C. from C and C) in product steams as summarised in the table below. The distillation column operates at 1.2 atm pressure and the feed enters at its bubbling point. Composition (mol/h) of the feed, top product and bottom product are summarised in the following table. ch Feed Top product Bottom product (mol/h) (mol/h) (mol/h) n-butane (C) 15 15 0 n-pentanc (C) 22 22 0 n-hexane (C) 25 24 1 n-heptane (C) 36 6 30 n-octane (C) 38 0 38 ou represents the relative volatility of component i over component j. 4.2 3.8 2.0 1.0 0.38 (a) Identify the key and non-key components. [2 marks] (b) Calculate minimum number of stages using the Fenske equation. [2 marks] (c) Calculate Rain using the Underwood equation. Assume 0 = 1.32. [4 marks) (d) Determine the number of ideal stages using the Kirkbride equation if reflux ratio is 1.3 Remin- [4 marks]

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