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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. How can the direction of mass transfer be reversed as it is in a complete gas plant? What controls whether a column is a stripper or an absorber?

A2. Why is the Murphree efficiency often lower in chemical absorption than in physical absorption? (What additional resistances are present?)

A3. After reviewing Chapter 10, outline the method of determining the column diameter for an absorber or stripper in a packed column.

A4. As the system becomes dilute, L/G→L/V, Y → y, and X → x. At what concentration levels could you safely work in terms of fractions and total flows instead of ratios and flows of solvent and carrier gas? What variable will this depend on? Explore numerically.

A5. Which methods will give accurate results ...

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