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- W2002744269 abstract "The present study emphasizes the coupling between reaction and diffusion phenomena in catalyst-coated diesel particulate filters. The main emphasis is placed on the effect of NO2 back-diffusion, which is responsible for higher-than-expected reaction rates at low temperatures. Unlike traditional modeling approaches that neglect diffusion effects, the model presented in this study considers the coupled diffusion−reaction phenomena by proper discretization in the porous layer and wall. With the aid of the model, a theoretical analysis is performed on the importance of individual operating parameters on the regeneration performance of a catalyst-coated filter. It is shown that the contribution of diffusion is responsible for about one-third of the total regeneration rate for the range of conditions typically found in medium-sized diesel engines. The results are sensitive to the values of the effective diffusivities of the species (in particular NO2) in the porous catalytic wall and the soot layer. For a deeper understanding of the involved processes, further work is needed to determine the effective diffusivities experimentally." @default.
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- W2002744269 date "2004-01-27" @default.
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- W2002744269 title "Back-Diffusion Modeling of NO<sub>2</sub> in Catalyzed Diesel Particulate Filters" @default.
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- W2002744269 doi "https://doi.org/10.1021/ie034187p" @default.
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