Advanced 1D model of deep filtration in a porous wall with complex morphology

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F25%3A43931479" target="_blank" >RIV/60461373:22340/25:43931479 - isvavai.cz</a>

Výsledek na webu

<a href="https://zenodo.org/records/15120702" target="_blank" >https://zenodo.org/records/15120702</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.cej.2025.159879" target="_blank" >10.1016/j.cej.2025.159879</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Advanced 1D model of deep filtration in a porous wall with complex morphology

Popis výsledku v původním jazyce

1D modeling of deep filtration process in a porous medium often relies on unit-collector approach that approximates the porous medium morphology by abed of packed spheres (collectors) with the same average porosity and surface density. During deep filtration, solid sphere collectors grow as particles are deposited on their surface. Such models are commonly employed, e.g., in 1D+1D models of ceramic monolith filters for exhaust gas aftertreatment. In this work, we compare this 1D approach with a detailed 3D model, and propose a couple of extensions to the 1D model that significantly improve its predictive capability for porous media with more complex morphology. First, we introduce anew parameter to describe the fraction of percolating pores, as non-percolating pores do not contribute to the filtration process. Second, a new capture mechanism in partially loaded filter is considered for particles following the streamlines that pass through a highly porous shell of the already grown particle deposits on the collector surface. This mechanism was neglected in the original model, where the whole collector was considered as a solid sphere and all gas streamlines were directed strictly around the sphere. The extended 1D model was tested against the averaged results of 3D pore-scale model, considering realistic structures of cordierite filters with catalytic coating obtained from Xray microtomography. The improved 1D unit-collector model provides reasonably accurate predictions of how the efficiency evolves during deep filtration process for different filter structures, particle sizes and gas flow rates, while keeping low computational demands.

Název v anglickém jazyce

Advanced 1D model of deep filtration in a porous wall with complex morphology

Popis výsledku anglicky

1D modeling of deep filtration process in a porous medium often relies on unit-collector approach that approximates the porous medium morphology by abed of packed spheres (collectors) with the same average porosity and surface density. During deep filtration, solid sphere collectors grow as particles are deposited on their surface. Such models are commonly employed, e.g., in 1D+1D models of ceramic monolith filters for exhaust gas aftertreatment. In this work, we compare this 1D approach with a detailed 3D model, and propose a couple of extensions to the 1D model that significantly improve its predictive capability for porous media with more complex morphology. First, we introduce anew parameter to describe the fraction of percolating pores, as non-percolating pores do not contribute to the filtration process. Second, a new capture mechanism in partially loaded filter is considered for particles following the streamlines that pass through a highly porous shell of the already grown particle deposits on the collector surface. This mechanism was neglected in the original model, where the whole collector was considered as a solid sphere and all gas streamlines were directed strictly around the sphere. The extended 1D model was tested against the averaged results of 3D pore-scale model, considering realistic structures of cordierite filters with catalytic coating obtained from Xray microtomography. The improved 1D unit-collector model provides reasonably accurate predictions of how the efficiency evolves during deep filtration process for different filter structures, particle sizes and gas flow rates, while keeping low computational demands.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

20401 - Chemical engineering (plants, products)

Projekt

<a href="/cs/project/GA22-12227S" target="_blank" >GA22-12227S: Počítačový návrh katalytických filtrů zohledňující vliv zachycených částic</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Chemical Engineering Journal

ISSN

1385-8947

e-ISSN

1873-3212

Svazek periodika

506

Číslo periodika v rámci svazku

15 January 2025

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

14

Strana od-do

159879

Kód UT WoS článku

001422472900001

EID výsledku v databázi Scopus

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