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

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A. Discussion Problems

A1. Compare Colburn Eq. (16-81d) to the equivalent Kremser Eq. (13-11b) and compare Eq. (16-81e) to (13-11a). If we relate nO-Ey to N and set S = E, F = R, yN+1 = yin, y1 = yout, and y1* = yout* what terms are similar and what terms are different? [Note that the LHS of Eq. (13-11a) is inverted compared to Eq. 16-81e).]

A2. The mass transfer models include transfer in only the packed region. Mass transfer also occurs in the ends of the column where liquid and vapor are separated. Discuss how these “end effects” will affect a design. How could one experimentally measure the end effects?

A3. Is a stage with a well-mixed liquid less or more efficient than a stage with plug flow of liquid across the stage (assume KGa is the ...

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