8 a stripping section operating line is drawn that

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Unformatted text preview: he partial reboiler, and 13.8 equilibrium stages in the rectifying section. Analysis: (a) (continued) Exercise 7.51 (continued) Exercise 7.51 (continued) Analysis: (a) (continued) Exercise 7.51 (continued) Analysis: (a) (continued) Exercise 7.51 (continued) Analysis: (continued) (b) Because the value of HOG is given in part (d), calculate NOG for each section, using from Table 6.7 for EM diffusion, N OG = dy y -y * For the stripping section, the first stage is the partial reboiler. Therefore, from the McCabeThiele diagram, starting from Stage 2, the limits on y are y = 0.09 at x = 0.03 to y = 0.37 at x = 0.10. Using the trapezoidal method to solve the integral, ( NOG )SS = y (0.23 - 0.09) (0.37 - 0.23) = + = 2.4 0.10 0.14 ( y *- y) For the rectifying section, the limits on y are y = 0.37 at x = 0.1 to y = 0.80. Using the trapezoidal method to solve the integral, ( NOG ) RS = y (0.42 - 0.37) (0.665 - 0.42) ( 0.80 - 0.665 ) = + + = 12.4 0.084 0.063 0.017 ( y *-y) (c) For 15.8 equilibrium sta...
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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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