Showing result: 1 - 10 of 16
Reaction Engineering Lab
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Chemical Vapor Deposition of GaAs
Chemical vapor deposition (CVD) allows a thin film to be grown on a substrate through molecules and molecular fragments adsorbing and reacting on a surface.
This example illustrates the modeling of such a CVD reactor where triethyl-gallium first decomposes, and the reaction products along with a...
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Ozone Combustion
This 1D example illustrates the detailed modeling of a premixed, laminar, steady-state flame where ozone undergoes combustion to form oxygen. The chemical degradation of ozone is described by seven reversible, elementary reactions.
Mass, energy and continuity equations, describing the flame, are...
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Polymerization in a Multijet Tubular Reactor
This example considers condensation polymerization in a tubular reactor, where mixing in the reactor is achieved by impinging turbulent jets of reactants onto each other.
Turbulent flows involving rapid reaction kinetics are quite common in the production of polymers, and the complex interplay b...
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Hydrocarbon Dehalogenation in a Tortuous Microreactor
Removing halogen groups from hydrocarbons is an important reaction step in several chemical processes. One application is water purification. Other examples involve organic synthesis, where the removal of halogen groups serves as a starting point for carbon-carbon coupling reactions. Typically, the...
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Chemical Reactions and Soot Build-up in a Diesel Filter
In this model, a filter system for a diesel engine is modelled, including where a soot layer builds up and is oxidized. The build-up of the layer is held in check by both catalytic and non-catalytic reactions, where carbon is oxidized to carbon monoxide and carbon dioxide, which in turn passes throu...
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Pesticide Transport and Reaction in Soil
Aldicarb is a commercial pesticide, used on a variety of crops, including cotton, fruits, potatoes, and beans. This arises in the possibility that the general population may be exposed to aldicarb through the ingestion of contaminated water and foods.
This example looks at the degradation kinetic...
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Fully-coupled Physics with Joule Heating, CFD and Chemical Reactions
In this example, a fluid carrying several chemical components is pumped into a detector compartment. A wire in the center of the detector is heated through Joule heating, which is supposed to detect changes in density through convective cooling. However, the higher temperature around the wire causes...
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Carbon Deposition in Heterogeneous Catalysis
Carbon deposition onto the surface of solid catalysts is commonly observed in hydrocarbon processing. Carbon deposits can affect both the activity of catalysts as well as the flow of gas through a catalyst bed.
This example investigates the thermal decomposition of methane into hydrogen and solid...
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NOx Reduction
This model treats the selective catalytic reduction of NOx 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...
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Chemical Equilibrium in a Protein Adsorption Ion-exchanger
This example uses algebraic equilibrium relations to model the time-dependent adsorption of proteins to an ion-exchange medium.
The fluid phase contains three components: two proteins and one salt. The adsorption/desorption kinetics are described by a set of equilibrium reactions where proteins...
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