Fortschritte bei der Modellierung von Festbettreaktoren

Progress in the modeling of fixed bed reactors. Recent work on the modeling of catalytic fixed bed reactors have led to more realistic mathematical models and to a better understanding of problems connected with modeling. Nowadays standard routine computer programs are available for use in the design (and analysis) of catalytic fixed bed reactors for very complex reaction systems. The influence of bed structure on transport parameters was illustrated by experimental determination of axial and radial concentration and temperature distribution. Moreover the problem of multicomponent diffusion coupled with complex reactions in porous catalysts has been solved and can be included in the reactor model. However, the practical application of possible reactor models is limited by the availability of transport parameters for fixed beds.     

Modellierung und Simulation von Vollmantelzentrifugen als ein Aspekt der voranschreitenden Digitalisierung in der Fest/Flüssig‐Trennung

As a part of the initiative Industry 4.0, the level of digitization in the process industry is increasing. Through a close link between analytics and dynamic modeling, digitization enables the optimization in processing industry or the model‐based control. For this purpose, mathematical models of the process level enabling real time simulations have to be known. In the field of solid‐liquid separation the advancing digitization forces the development of numerical flow simulation methods and short‐cut models to deepen process understanding and mathematical process modeling. Resolved flow simulations should be seen as support for experiments to develop suitable dynamic models for short‐cut models. Based on the prerequisites, the development of dynamic process models and their application using the example of solid bowl centrifuges is described.