The optimal design of reactive separations is impossible without reliable p
rocess models. Especially for the dynamic simulation and the model-based co
ntrol of complex reactive absorption processes the model development leads
to a contradiction between the required model accuracy to reflect the proce
ss complexity and the feasibility of process simulations regarding the comp
utation time. In this respect, we have developed a new rigorous dynamic two
-phase model based on the two-film theory as a first step, which takes into
account the influence of chemical reactions and additional driving forces
in electrolyte systems on mass transfer considering thermodynamic nonideali
ties as well as the impact of column internals on the process hydrodynamics
. For a model optimization, we have performed an analysis of different mode
l approaches for complicated industrial absorption processes and determined
an appropriate model complexity. Based on results of sensitivity studies,
we have accomplished different model modifications leading to a stabilizati
on of the numerical solution without affecting the good agreement between s
imulation results and the experimental data. This time-optimized model can
be considered superior as compared to previous approaches and facilitates f
or the first time a rigorous dynamic simulation of entire reactive absorpti
on columns and the application within an on-line process control system.