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 ...