HW06.docx - Reading Wankat 4.11 – 4.15 10.1-10.2 Concept questions 1 Briefly explain the difference between the operating line for the stripping

# HW06.docx - Reading Wankat 4.11 – 4.15 10.1-10.2 Concept...

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Reading: Wankat 4.11 – 4.15 & 10.1-10.2 Concept questions: 1. Briefly explain the difference between the operating line for the stripping section (BOL) for a distillation column operating with open steam heating, as compared to a traditional column. The BOL in open steam heating distillation columns is shifted downwards and intersecting with the x-axis rather with the 45 degree line.

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2. 4A2. a 1. 2. 3. 4. b c
3. 4A5.

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Analytical problems: 4D8 * For Problem 4.D7c for separation of acetone from ethanol, determine a. The number of stages required at total reflux. Chapter 4. Binary Column Distillation: Internal Stage-by-Stage Balances 330 b. The values of (L/V) min and (L/D) min . c. How much larger the L/D used is than (L/D) min . d. The number of real stages required for L/V = 0.8 if E MV = 0.75. 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
5. 4D11 [L/V = 0.8, N = 3 + PC] 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 X Y

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6. 4D33 * 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 X Y
7. We wish to process 70 kmol/h of a saturated liquid feed that is 40 mol% methanol in water in a stripping column operating at 1 atm. The column has a partial reboiler plus 2 equilibrium trays. We want a bottoms mole fraction that is

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