Selective Reduction of Nitric Oxide

The removal of pollutants from combustion processes is currently a very important issue for the environment. One such pollutant is Nitric Oxide, found in the exhaust of gasoline and diesel engines.

This model treats the selective catalytic reduction of Nitric Oxide in an exhaust gas stream. The reaction takes place on the catalytic surface of a monolith reactor.

A first simulation models the monolith channel as a plug-flow reactor. A second simulation takes the actual channel geometry into account and solves the coupled mass and momentum balance equations, considering free flow in the channel, and porous media flow in the washcoat.

Chemical Vapor Deposition of GaAs

Chemical Vapor Deposition (CVD) is an important process for the electronics industry that often uses it to grow thin layers onto semi-conductor surfaces. A thin film is grown on a substrate by allowing molecules and molecular fragments to adsorb and react on a surface.

Combining detailed chemical reaction kinetics with transport models of a CVD reactor allows for realistic modeling of the deposition process.

Firstly, you will compare a reduced reaction scheme to the full scheme in the COMSOL Reaction Engineering Lab. In this tool, it is easy to study different models by activating and deactivating reactions.

Then, you will export the reduced scheme described in the Reaction Engineering Lab to the Chemical Engineering Module in COMSOL Multiphysics for the simulation of the complex reaction/transport mechanisms in a detailed reactor geometry.