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Separation Process Engineering: Includes Mass Transfer Analysis, Third Edition by Phillip C. Wankat

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F. Problems Requiring Other Resources

F1.* A mixture of oxygen and nitrogen is to be distilled at low temperature. The feed rate is 25,000 kmol/h and is 21 mol% oxygen and 79 mol% nitrogen. An ordinary column (as shown in Figure 3-8) will be used. Column pressure is 1 atm. The feed is a superheated vapor at 100 K. We desire a bottoms composition of 99.6 mol% oxygen and a distillate that is 99.7 mol% nitrogen. Reflux ratio is L0/D = 4, and reflux is returned as a saturated liquid. Find D, B, QR, and Qc.

F2.* A mixture of water and ammonia is to be distilled in an ordinary distillation system (Figure 3-8) at a pressure of 6 kg/cm2. The feed is 30 wt % ammonia and is at 20 °C. We desire a distillate product that is 98 wt % ammonia and a 95% recovery ...

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