Q4// A liquid mixture of benzene-toluene is to be distilled in a fractionating tower. The feed contains 40 mol % benzene and 60 mol % toluene. A distillate containing 90 mol % benzene and a bottoms containing 10 mol % benzene. The feed at the boiling point, the reflux ratio is 4 and average 2.4. Equilibrium data for this system are given in the table below: XA 1 0.78 0.58 0.41 0.258 0.13 0 1 0.9 0.777 0.632 YA 0.456 0.26 1- Calculate the number of plates required. 2- What is the number of feed introducing tray from top. 3- Minimum number of theoretical plates. 4- Minimum reflux ratio. 0

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