Ch07

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Unformatted text preview: re, x -x /K 0.20 - 0.04 / 1159 . log A + 1 - A N +1 1 log 0.9085 + 1 - 0.9085 x1 - x1 / K 0.04 - 0.04 / 1159 . NS = = = 135 . 1 1 log log A 0.0985 Analysis: (continued) Exercise 7.39 (continued) Summing the above results, Number of equilibrium stages in the rectifying section = 28 + 23.6 = 51.6 stages Number of equilibrium stages in the stripping section = 34.3 + 13.5 = 47.8 stages Call it 99 stages in the column plus a partial reboiler with the feed to stage 52 from the top. This compares to 102 stages in the column plus a partial reboiler with the feed to stages 50 from top as determined by the Fenske-Underwood-Gilliland method. Analysis: (continued) Exercise 7.39 (continued) Exercise 7.39 (continued) Analysis: (continued) Exercise 7.40 Subject: Use of a McCabe-Thiele diagram to determine stage requirements for the distillation of air into nitrogen and oxygen using a Linde double column. Given: As shown in Fig. 7.45, the distillation consists of an upper column (UC) operating at 1 atm, on top of a...
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This note was uploaded on 09/08/2008 for the course CHE 244 taught by Professor Selebi during the Spring '06 term at Lehigh University .

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