Basic Principles and Calculations in Chemical Engineering

Chapter 6. Material Balances for Multi-Unit Systems

6.1 Primary Concepts

6.2 Sequential Multi-Unit Systems

6.3 Recycle Systems

6.4 Bypass and Purge

6.5 The Industrial Application of Material Balances

Your objectives in studying this chapter are to be able to

1. Write a set of independent material balances for a process involving more than one unit

2. Apply the ten-step strategy to solve multi-unit steady-state problems (with and without chemical reactions) involving sequential, recycle, and/or bypass, and/or purge streams

3. Solve problems by hand in which a modest number of interconnected units are involved by making appropriate balances

4. Use the overall conversion and single-pass (once-through) conversion concepts in solving recycle problems ...