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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. What variables does the Gilliland correlation not include? How might some of these be included? Check the Erbar-Maddox (1961) method (or see King, 1980, or Hines and Maddox, 1985) to see one approach that has been used.

F2. A distillation column with a total condenser and a partial reboiler operates at 1.0 atm.

a. Estimate the number of stages at total reflux to separate nitrogen and oxygen to produce a nitrogen mole fraction in the bottoms of 0.001 and a nitrogen distillate mole fraction of 0.998.

b. If the feed is 79.0 mol% nitrogen and 21.0 mol% oxygen and is a saturated vapor, estimate (L/D)min.

c. Estimate the number of stages and the feed location if L/D = 1.1 (L/D)min. The column has a total condenser ...

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