Interactive Self-Study Module: Isothermal Semibatch Reactors

This module uses screencasts and interactive simulations to explain isothermal semibatch reactors. It then provides example problems and step-by-step quiz simulations to allow the user to test themselves. We suggest using the learning resources in the following order:

  1. Attempt to answer the multiple-choice ConcepTest and solve the example problem before watching the screencasts or working with the simulations.
  2. Watch the screencast that describes semibatch reactors and answer the questions within the screencast.
  3. Use the interactive simulation to further understand isothermal semibatch reactors.
  4. Try to solve the two example problems before watching the solutions in the screencasts.
  5. Answer the ConcepTests.
  6. Look at the list of key points, but only after you try to list the key points yourself. 

 This module is intended for a Kinetics/Reactor Design course.

Before studying this module, you should be able to:

  • Calculate mass balances.
  • Solve reactor problems for batch reactors.
  • Explain what the rate of reaction is and how reaction rates depend on concentrations.
  • Solve systems of ordinary differential equations numerically using software such as Polymath, Mathcad, MATLAB, Mathematica, etc.  These equations are initial-value problems. 

After studying this module, you should be able to:
  • Determine the number of moles of reactants and products in a semibatch reactor as a function of time, given the rate constant, order of reaction, initial moles in the reactor, and feed and/or effluent flow rates.
  • Determine when a semibatch reactor should be used and how it should be run.