Impact of diffusion limitations inside the wall of catalytic filters on conversion of gaseous pollutants at increased flow rates

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F22%3A43925500" target="_blank" >RIV/60461373:22340/22:43925500 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S0009250922004602?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0009250922004602?via%3Dihub</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.ces.2022.117876" target="_blank" >10.1016/j.ces.2022.117876</a>

Result language
angličtina
Original language name
Impact of diffusion limitations inside the wall of catalytic filters on conversion of gaseous pollutants at increased flow rates
Original language description
In this paper we present a methodology for experimental observation of mass-transfer limitations in catalytic filter wall and their impact on the outlet conversion of gaseous pollutants. Series of cordierite filter samples are coated in the lab with a model Pt/γ-Al2O3 catalyst to obtain different structures that are characterized by cross-section SEM images. Pressure drop and CO oxidation experiments are performed, focusing on the performance at higher flow rates. The presence of permanent CO slip above the light-off temperature provides a clear evidence of diffusion limitations in wall pores. While all the samples including the filter with an uncoated zone exhibit negligible CO slip at lower flow rates, there are significant differences at higher flow rates (space velocity 100 000 h−1 and above). Thanks to more uniform catalyst distribution inside the wall pores, the filters coated with the suspension d90 = 0.3 µm exhibit a lower CO slip than the filters coated with d90 = 4 µm.
Czech name
—
Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20401 - Chemical engineering (plants, products)

Project
<a href="/en/project/GA19-22173S" target="_blank" >GA19-22173S: Microstructure of catalytic filters for automotive exhaust gas aftertreatment</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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