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

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H. Computer Spreadsheet Problems

H1. Solve the following problems with a spread sheet. A mixture of benzene (A) and cumene (C) is to be distilled in a simple batch system. The initial charge of 5.0 kmol is 37 mol% benzene and 63 mol% cumene. At the system pressure of one atmosphere and choosing cumene (C) as the reference component, the relative volatility is αA-C = 10.71. Use Eq. (9-13).

a. We desire a fractional recovery of benzene in the distillate of 75%. Find xA,Wfinal, Wfinal, Dtotal, and xA,D,avg.

b. If we want xA,Wfinal = 0.05, what fractional recovery of benzene in the distillate is required? Find Wfinal, Dtotal, and xA,D,avg.

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