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Separation Process Engineering: Includes Mass Transfer Analysis, Third Edition by Phillip C. Wankat

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E. More Complex Problems

E1. A laboratory steam stripper with 11 real stages is used to remove 1000 ppm (wt) nitrobenzene from an aqueous feed stream which enters at 97°C. The flow rate of the liquid feed stream is Lin = F =1726 g/h. The entering steam rate was measured as S = 99 g/hr. The leaving vapor rate was measured as Vout = 61.8 g/h. Column pressure was 1 atm. The treated water was measured at 28.1 ppm nitrobenzene. Data at 100°C are in Problem 12.D4. Molecular weights are 123.11 and 18.016 for nitrobenzene and water, respectively. What is the overall efficiency of this column?

Note: A significant amount of steam condenses in this system to heat the liquid feed to its boiling point and to replace significant heat losses. An approximate ...

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