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

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Chapter 4. Binary Column Distillation: Internal Stage-by-Stage Balances

4.0 Summary—Objectives

In this long chapter we develop the stage-by-stage balances for distillation columns and show how to solve these equations when molar flow rates in each section of the column are constant (called constant molal overflow [CMO]). When finished studying this chapter, you should be able to satisfy the following objectives:

1. Write mass and energy balances and equilibrium expressions for any stage in a column

2. Explain what CMO is, and determine if CMO is valid in a given situation

3. Derive the operating equations for CMO systems

4. Calculate the feed quality, and determine its effect on flow rates. Plot the feed line on a y-x diagram

5. Determine the ...

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