This document discusses the design of chemical reactors, including batch and continuous stirred-tank reactors (CSTR). It covers key concepts like space time, space velocity, and accumulation equations for CSTR design. Examples are provided for solving first and second order reaction systems using a graphical approach, including determining rate constants from concentration-rate graphs and applying variable volume systems.

1. Chemical/Polymer Reactor Design-4 Muhammad Zafar Iqbal

2. Today Brief overview of batch reactor system Space Time and Space Velocity: Concept and Importance Designing of Continuous stirred tank reactor (CSTR) Examples: 5.1, 5.2 Problems: 5.4, 5.15, 5.20, 5.21,5.23,

3. Space Time and Space Velocity Performance parameters of flow reactors Space time Space Velocity

4. CSTR Design: Basic Design Equation 1- 2- Accumulation = 0 3- 4- 5- 6-

5. For a fixed conversion, the above expression can be written as: Also in terms of concentration units, Graphical approach:

6. First Order systems: 2 nd order systems: For varying volume systems:

7. Example 5.1 Solve yourself

8. Steps: 1- Calculate the expansion factor 2- Calculate conversion for variable volume system for each run 3- Determine different (-r A ) values from CSTR design equation 4- Draw a graph between conc. And rate of reaction and determine the values of “n” and “k” Example # 5.3 Assigned