3D reconstruction and pore-scale modeling of coated catalytic filters for automotive exhaust gas aftertreatment

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388998%3A_____%2F19%3A00497313" target="_blank" >RIV/61388998:_____/19:00497313 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60461373:22340/19:43919370 RIV/49777513:23640/19:43955070

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0920586117308416" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0920586117308416</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.cattod.2017.12.025" target="_blank" >10.1016/j.cattod.2017.12.025</a>

Jazyk výsledku

angličtina

Název v původním jazyce

3D reconstruction and pore-scale modeling of coated catalytic filters for automotive exhaust gas aftertreatment

Popis výsledku v původním jazyce

This paper introduces a newly developed methodology for the pore-scale simulation of flow, diffusion and reaction in the coated catalytic filter. 3D morphology of the porous filter wall including the actual distribution of catalytic material is reconstructed from X-ray tomography (XRT) images and further validated with the mercury intrusion porosimetry (MIP). The reconstructed medium is then transformed into simulation mesh for OpenFOAM. Flow through free pores in the substrate as well as through the coated zones is simulated by porousSimpleFoam solver, while an in-house developed solver is used for component diffusion and reactions.nThree cordierite filter samples with different distribution of alumina-based coating ranging from in-wall to onwall are examined. Velocity, pressure and component concentration profiles are calculated enabling the prediction of permeability and component conversion depending on the actual microstructure of the wall. Thensimulation results suggest that the gas predominantly flows through remaining free pores in the filter wall and cracks in the coated layer. The mass transport into the coated domains inside the filter wall is enabled mainly by diffusion. Large domains of compact catalytic coating covering complete channel wall result in a significant increase of pressure drop as the local permeability of the coating is two orders of magnitude smaller than that of bare filter wall.

Název v anglickém jazyce

3D reconstruction and pore-scale modeling of coated catalytic filters for automotive exhaust gas aftertreatment

Popis výsledku anglicky

This paper introduces a newly developed methodology for the pore-scale simulation of flow, diffusion and reaction in the coated catalytic filter. 3D morphology of the porous filter wall including the actual distribution of catalytic material is reconstructed from X-ray tomography (XRT) images and further validated with the mercury intrusion porosimetry (MIP). The reconstructed medium is then transformed into simulation mesh for OpenFOAM. Flow through free pores in the substrate as well as through the coated zones is simulated by porousSimpleFoam solver, while an in-house developed solver is used for component diffusion and reactions.nThree cordierite filter samples with different distribution of alumina-based coating ranging from in-wall to onwall are examined. Velocity, pressure and component concentration profiles are calculated enabling the prediction of permeability and component conversion depending on the actual microstructure of the wall. Thensimulation results suggest that the gas predominantly flows through remaining free pores in the filter wall and cracks in the coated layer. The mass transport into the coated domains inside the filter wall is enabled mainly by diffusion. Large domains of compact catalytic coating covering complete channel wall result in a significant increase of pressure drop as the local permeability of the coating is two orders of magnitude smaller than that of bare filter wall.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20402 - Chemical process engineering

Projekt

<a href="/cs/project/LO1402" target="_blank" >LO1402: CENTEM+</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název periodika

Catalysis Today

ISSN

0920-5861

e-ISSN

—

Svazek periodika

320

Číslo periodika v rámci svazku

January

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

10

Strana od-do

165-174

Kód UT WoS článku

000448295200018

EID výsledku v databázi Scopus

2-s2.0-85039838260