1. A distillation column operating at 1 atm is separating acetone and ethanol. The column effectively has six equilibrium contacts plus a partial reboiler. Feed is flashed to 60% vapor as it enters the column. The feed contains 75 mole% acetone. The feed rate is 100 kmol/hr and the feed enters between the 4th and 5th stage from the top. The column is now operating at a steady state with the bottoms flow valve closed. A distillate product is being drawn off and vapor is still being boiled-up from the reboiler. Reflux is a saturated liquid and the external reflux ratio is 2. VLE data for acetone and ethanol is provided below. a. What is the distillate composition? b. If a liquid sample was withdrawn from the reboiler, what would be its composition? Acetone/Ethanol VLE at 1 atm xAcetone yAcetone 0 0 0.1 0.262 0.15 0.348 0.2 0.417 0.25 0.478 0.3 0.524 0.35 0.566 0.4 0.605 0.5 0.674 0.6 0.739 0.7 0.802 0.8 0.865 0.9 0.929 1 1

1. A distillation column operating at | atm is separating acetone and ethanol. The column effectively has six equilibrium contacts plus a partial reboiler. Feed is flashed to 60% vapor as it enters the column. The feed contains 75 mole' acetone. The feed rate is 100 kmol/hr and the feed enters between the 4" and 5" stage from the top. The column is now operating at a steady state with the bottoms flow valve closed. A distillate product is being drawn off and vapor is still being boiled-up from the reboiler. Reflux is a saturated liquid and the external reflux ratio is 2. VLE data for acetone and ethanol is provided below. a. What is the distillate composition? b. Ifa liquid sample was withdrawn from the reboiler, what would be its composition? Acetone/Ethanol WLE at 1 ate xAceione yAcetone i i (1 0.262 0.15 0.348 0.2 0.417 0.25 0.478 0.3 0.524 0.35 0.566 (4 0.605 0.5 0.674 0.6 0.739 0.7 0.802 0.8 0.865 0.9 0.929 1 1