Question: 1. The following table specifies the separation to be achieved by means of a distillation column Component Feed Distillate Bottoms (Mole Fraction) (Mole Fraction) (Mole

1. The following table specifies the separation to be achieved by

1. The following table specifies the separation to be achieved by means of a distillation column Component Feed Distillate Bottoms (Mole Fraction) (Mole Fraction) (Mole Fraction) propane 0.1 0.182 0 n-butane 0.15 0.273 0 n-pentane 0.3 0.509 0.044 n-hexane 0.25 0.036 0.511 n-heptane 0.15 0 0.333 n-octane 0.05 0 0.111 Total: 1.00 Total: 1.00 Total: 1.00 le The feed enters at its bubble-point terkperature; vapour from the top stage (stage 1) enters a total condenser, the resulting liquid (distillate and reflux) leaves at its bubble point of 32 C. The partial reboiler operates at a temperature of 126 C and the top stage temperature is 63 C. The column operates at a pressure of 320 kPa and pressure drops may be neglected. a) Identify the key components. (1 mark) b) Calculate the minimum reflux ratio using Underwood equation. (7 marks) c) How many equilibrium stages needed to achieve this separation, if R= 1.1 Ruin and Noun 6.44 including the P.R. (2 marks)

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