Advective Transport of Interacting Solutes: The Chromatographic Model

Methods of multicomponent chromatography are presented that allow to visualize the influence of chemical interactions on solute transport. The Riemann problem is solved to a large extent based on the mathematics of non-linear hyperbolic differential equations, be-fore the problem is handed over to the computer. Since thereby the computational efforts are kept compatible with the corresponding limitations in a chemical laboratory, this method has been used for decades in chemical engineering. The method is illustrated for various multicomponent isotherms, e.g. the one underlying surface com-plexation models as implemented in the MINEQL family of pro-grams.