Development of a spatially-resolved technique for the measurement of effective diffusions and Its application to the reaction modelling of deactivated washcoated catalytic monoliths

Spatially-resolved experimental techniques provide a solution to this drawback, by accessing spatiotemporal intra-catalyst information to help in the construction in more accurate and predictive models. Using spatially and/or temporally mapping of aftertreatment reactions in structured catalysts provide a density of information which is crucial for the optimisation of kinetics modelling for engine operations, however, difficult to access using traditional end-pipe analysis methods.<br><br>The main requirement of catalytic converters modelling is to accurately predict their performance through mathematical expressions, representing physiochemical processes of these aftertreatment systems.

These processes include mass transfer and surface reactions associated with the chemistry of interest. As mass transfers from the gas phase to the catalyst surface have significant influences in determining the kinetics of the reactions, the accuracy in describing these processes is crucial. The aim of the present work is to develop a novel methodology to determine, experimentally, the mass transfer coefficients in monolith catalysts using a spatially-resolved approach.