Particle-based modeling of heterogeneous chemical kinetics including mass transfer

Particle-based modeling of heterogeneous chemical kinetics including mass transfer

Sengar, A. (Eindhoven University of Technology)
Kuipers, J.R. (Eindhoven University of Technology)
Van Santen, Rutger A. (Eindhoven University of Technology)
Padding, J.T. (TU Delft Intensified Reaction and Separation Systems)

2017

Connecting the macroscopic world of continuous fields to the microscopic world of discrete molecular events is important for understanding several phenomena occurring at physical boundaries of systems. An important example is heterogeneous catalysis, where reactions take place at active surfaces, but the effective reaction rates are determined by transport limitations in the bulk fluid and reaction limitations on the catalyst surface. In this work we study the macro-micro connection in a model heterogeneous catalytic reactor by means of stochastic rotation dynamics. The model is able to resolve the convective and diffusive interplay between participating species, while including adsorption, desorption, and reaction processes on the catalytic surface. Here we apply the simulation methodology to a simple straight microchannel with a catalytic strip. Dimensionless Damkohler numbers are used to comment on the spatial concentration profiles of reactants and products near the catalyst strip and in the bulk. We end the discussion with an outlook on more complicated geometries and increasingly complex reactions.

http://resolver.tudelft.nl/uuid:4cc6803a-b9e9-4ed6-a980-a4072ccf4f20

https://doi.org/10.1103/PhysRevE.96.022115

2470-0045

Physical Review E, 96 (2)

Institutional Repository

journal article

© 2017 A. Sengar, J.R. Kuipers, Rutger A. Van Santen, J.T. Padding