1. 3.2 Series of Continuous , constant-holdup Stirred-tank Reactors
V1, k1
V2, k2
V3, k3 F1 F2 F3 F0
CA0
CA1
CA3
CA2

2. Example 3.2 Assumptions Perfectly mixed reactors in series
Simple first-order isothermal reaction takes place
A---->B
T,V of the three tanks can be different, but both T and V are assumed to be constant.
Density is constant throughout the system, which is a binary mixture of A and B.
Task: How does composition of A vary with time?

3. Example 3.2 Equations of model / Total mass balance
F is defined as the throughput

4. Example 3.2 Mass balance of A
The variables that must be specified before these equations can be solved: F and CA0
The initial values of the three concentrations must be known.

5. Example 3.6 C. Lumped jacket model
The jacket volume is broken up into a number of perfectly mixed “lumps” .
TJ4 Q4 Q3
TJ3 T Q2
TJ2 FJ
TJ0 Q1
TJ1

6. Example 3.6 C. Lumped jacket model
An energy equation is needed for each lump