Add a competitive exchange model to MCT

[AntoniaBerger]

TODO

• Implement "Langumir" exchange model
  • Explicit formulation for multi component, multi channel
  • Add Interface
  • Add Test
• Adjust Cadet-Process Interface
  • Add capacity matrix
• Add documentation

Discussion about the model can be found in the Forum

[schmoelder]

Something we should conceptually consider for extraction is that the solution of individual components is not necessarily restricted by a "global" capacity since there is no surface that is being covered. Rather, each component has some individual saturation concentration that cannot be exceeded. It's not really competitive in that sense though. Hope that makes sense.

Is this possible in the current implementation?

Edit: Also commented in the forum, since we have all of the equations there.