Start with 40% hexane, draw a McCabe-Thiele diagram for the separation of hexane and octane at...

 

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Start with 40% hexane, draw a McCabe-Thiele diagram for the separation of hexane and octane at T = 340 K. Include the main parts = 1) x = y line, 2) xy equilibrium curve (from Raoult's law -- calculate using five points at x = 0, 0.2, 0.4, 0.7, and 1.0 for this curve), 3) rectifying operating line, 4) stripping operating line, 5) feed line. The rest of this problem will appear in #8. The vapor pressure at 340 K of hexane is pv = 95.5 kPa, and of octane is Pv2 = 13.9 kPa. The targets are XB = 0.10 and XD = 0.95. We'll let the actual reflux ratio be 3 times the min (i.e., R = 3 Rmin). Calculate the values below. NOTE: Min trays will be a small number due to large a. relative volatility (a) = min trays (Nmin) = min reflux ratio (Rmin): actual R = Start with 40% hexane, draw a McCabe-Thiele diagram for the separation of hexane and octane at T = 340 K. Include the main parts = 1) x = y line, 2) xy equilibrium curve (from Raoult's law -- calculate using five points at x = 0, 0.2, 0.4, 0.7, and 1.0 for this curve), 3) rectifying operating line, 4) stripping operating line, 5) feed line. The rest of this problem will appear in #8. The vapor pressure at 340 K of hexane is pv = 95.5 kPa, and of octane is Pv2 = 13.9 kPa. The targets are XB = 0.10 and XD = 0.95. We'll let the actual reflux ratio be 3 times the min (i.e., R = 3 Rmin). Calculate the values below. NOTE: Min trays will be a small number due to large a. relative volatility (a) = min trays (Nmin) = min reflux ratio (Rmin): actual R =

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Solutions Step 1 For the separation of hexane and octane the McCabeThiele diagram must be drawn To do this we must determine the relative volatility a ... View the full answer