When to turn on REDOX

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REDOX (REDduction and OXidation) reactions are off by default because on average, they are rate limited. The most common REDOX reactions used by clients are for the following elements

  • Iron, Fe
  • Sulfur, S
  • Chlorine, Cl
  • Nitrogen, N
  • Oxygen, O


If you have systems with these materials and suspect that REDOX reactions will occur, then we recommend that your perform the calculation multiple times using different settings:

  • First, keep REDOX off and run the calculation.
  • Next, turn REDOX on and compare the two results. RibbonBar-REDOX button.png
  • Lastly, turn REDOX on but this time, modify the allowable half-reactions in the dialog (Chemistry>Model Options>Redox). There are check boxes for each oxidation state that you can turn on and off.

Chemistry-ModelOptions-Redox-Sulfur.png


It is always good if the user has field experience, so that you can anticipate if REDOX is needed, and if so what oxidation states are dominant.