2 118 1 32 use the following additional properties

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Unformatted text preview: nued) (N ) (N ) -3/ 4 ReV ScV -1/ 3 uV a DV aPh -3/ 4 1 1/ 2 4(0.947) ( 0.947 - 0.0269 ) 0.322 86.84 1/ 2 ( 3, 470 ) ( 0.65 ) -1/ 3 (6.10)(86.8) = 0.69 m (0.34 10-4 )(44.2) For Montz, HG = 1 1/ 2 4(0.930) ( 0.947 - 0.0341) 0.422 3004 1/ 2 ( 652 ) -3/ 4 ( 0.65) -1/ 3 (3.96)(300) = 0.073 m (0.34 10-4 )(207) At the bottom of the column, vapor rate = V =1,368 lbmol/h and liquid rate = L = 2,570 lbmol/h. Therefore, mV/L = (2.50)(1,368)/(2,570) = 1.33 mV From Eq. (7.51), for NOR PAC, H OG = H G + H L = 0.69 + (1.33)(0.50) = 1.36 m = 4.4 ft L mV For Montz, H OG = H G + H L = 0.073 + (1.33)(0.048) = 0.14 m = 0.45 ft L (d) The packed height is given by Eq. (6-127), lT = HOGNOG Calculate NOG for each section, using from Table 6.7 for EM diffusion, N OG = dy y -y Apply this equation to the rectifying section and to the stripping section, using the McCabeThiele diagrams developed in Exercise 7.41. * For the rectifying section, the limits on y from the feed to the distillate are 0.64 to 0.915. The dif...
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