Mixer Simulations, Modeling Nonideal Reactors and Mixers

Continuous stirred tank reactors, batch reactors, and mixers are frequently used i nthe consumer product, food, pharmaceutical and fine chemical industries. Processess using these devices usually require carefully controlled environments, where conditions such as temperature and composition are regulated to ensure quality and reproducibility.

The typical approach is to investigate the chemical kinetics in perfectly mixed lab-scale batch reactors as the first step. The models are validated by comparing them to experimental data, and parameter estimation may be used in order to obtain rate constants and activation energies for the relevant reaction mechanism.

Once the chemistry is understood, the effects of transport phenomena may be included, typically at the pilot scale. Models including multicomponent transport may then be coupled to full CFD models of reactors and mixers. The transport models are also validated by comparing the simulation results to the experimental data from the pilot-scale reactor.

The validated transport-reaction models can be used to scale up from pilot scale to full scale. These models can also be used to optimize the design and operation of the full-scale process.

This webinar discusses methods for defining and solving detailed models from detailed chemical kinetics to full transport-reaction problems, including full CFD simulations for turbulent flows. We will also discuss methods for validation and parameter estimation, which can be used for accurate and robust prediction of full-scale processes from lab- and pilot-scale experiments.

Detailed models for the purpose of validating the design and operation of stirred tank reactors and mixers are defined by the laws of momentum, mass, and energy conservation. These are usually expressed as equations that can be solved using numerical models.

You'll learn:

• The important underlying principles behind detailed models of nonideal reactors and mixers, such as momentum, mass, material, and energy conservation
• How to define and solve detailed mathematical and numerical models, and address considerations for optimizing the design and operation of nonideal reactors and mixers
• How to solve and analyze mixers and reactors using COMSOL Multiphysics®

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