Assume that utility rates are such that lv and l v

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: lity rates are such that L/V and L / V are the same as in Case 1. Then, on the McCabe-Thiele diagram, the values of xD and xB must shift so that 5 stages are stepped off, with the fifth, which is the reboiler, intersecting the stripping section operating line at the 45o line. This is shown on the McCabe-Thiele diagram on the following page. (a) From this diagram, the mole fractions of benzene in the distillate and bottoms are 0.80 and 0.21, respectively. Case 3: Since the distillate composition in Case 2 is 80 mol% benzene, the results would be the same as Case 2 if an 80 mol% benzene stream from another column were used as reflux. Exercise 7.16 (continued) Analysis: Case 1 (continued) Exercise 7.16 (continued) Analysis: Case 2 (continued) Exercise 7.17 Subject: Distillation of a mixture of benzene and toluene with different feed conditions. Given: Column with 7 equilibrium plates, total condenser, and partial reboiler. Feed is 50 mol% benzene and 50 mol% toluene. Operation at 101 kPa to produce a distillate of 96 mol% benzene. Equilibrium data fr...
View Full Document

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 .

Ask a homework question - tutors are online