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In this paper a global reaction kinetic model is used to understand and describe the NOx storage/reduction process in the presence of CO 2 and H 2 O. Experiments have been performed in a packed bed reactor with a Pt–Ba/γ-Al 2 O 3 powder catalyst (1wt% Pt and 30wt% Ba) with different lean/rich cycle timings at different temperatures (200, 250, and 300∘C) and using different...
Kinetic models of reaction networks often feature sets of fast-reacting species. If the slow timescale is of interest, these species can be assumed to be in equilibrium and a singular perturbation approximation can be used to render the dynamics of the slow reacting subsystem. However, to obtain a reduction in the number of equations that represent the dynamics of the reaction network, an explicit...
Kinetic models of reaction networks often feature sets of fast-reacting species. If the slow timescale is of interest, these species can be assumed to be in equilibrium and a singular perturbation approximation can be used to render the dynamics of the slow reacting subsystem. However, to obtain a reduction in the number of equations that represent the dynamics of the reaction network, an explicit...
In this contribution kinetic mechanism reduction techniques are developed and applied to a 1-D plug-flow reactor (PFR) model. The proposed method yields different reduced mechanisms at each spatial position in the reactor. Local sensitivity analysis and flux analysis are combined with species lumping to obtain an automated reduction method. The criteria for the reduction method were modified to account...
Detailed kinetic surface reaction mechanisms are used in kinetic models for automotive catalysis applications. Therefore, these models are complex and often numerically stiff. For simulation, optimization and control purposes it is desirable to employ models of lower complexity that are accurate in specific operating regimes. In this contribution, a number of data-based kinetic mechanism reduction...
Detailed kinetic surface reaction mechanisms are used in kinetic models for automotive catalysis applications. Therefore, these models are complex and often numerically stiff. For simulation, optimization and control purposes it is desirable to employ models of lower complexity that are accurate in specific operating regimes. In this contribution, a number of data-based kinetic mechanism reduction...
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