Multi-scale modelling and measurements of diffusion through porous catalytic coatings: An application to exhaust gas oxidation

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F12%3A43893728" target="_blank" >RIV/60461373:22340/12:43893728 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.sciencedirect.com/science/article/pii/S0920586112002143" target="_blank" >http://www.sciencedirect.com/science/article/pii/S0920586112002143</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.cattod.2012.03.049" target="_blank" >10.1016/j.cattod.2012.03.049</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Multi-scale modelling and measurements of diffusion through porous catalytic coatings: An application to exhaust gas oxidation

Popis výsledku v původním jazyce

Novel experimental and computational methods to investigate diffusion in catalytic coatings are presented and demonstrated with Pt/gama-Al2O3 oxidation catalyst. The catalytic layer with defined particle and pore size distributions is coated on metal plates and subsequently overlaid by an inert layer acting as an additional diffusion resistance. The samples are tested in a lab reactor for CO oxidation and diffusion-limited regime is reached above the light-off temperature. Comparisons of the results obtained with the samples coated by active layer only and the samples additionally coated by an inert layer reveal the extent of diffusion limitations. The computational part is based on digital reconstruction of the porous layer as a 3D matrix; this is achieved using macroporosity obtained from SEM cross-section images, and measured particle size distributions. Reaction and diffusion are then simulated within a small layer section and the spatially averaged results are employed in the full

Název v anglickém jazyce

Multi-scale modelling and measurements of diffusion through porous catalytic coatings: An application to exhaust gas oxidation

Popis výsledku anglicky

Novel experimental and computational methods to investigate diffusion in catalytic coatings are presented and demonstrated with Pt/gama-Al2O3 oxidation catalyst. The catalytic layer with defined particle and pore size distributions is coated on metal plates and subsequently overlaid by an inert layer acting as an additional diffusion resistance. The samples are tested in a lab reactor for CO oxidation and diffusion-limited regime is reached above the light-off temperature. Comparisons of the results obtained with the samples coated by active layer only and the samples additionally coated by an inert layer reveal the extent of diffusion limitations. The computational part is based on digital reconstruction of the porous layer as a 3D matrix; this is achieved using macroporosity obtained from SEM cross-section images, and measured particle size distributions. Reaction and diffusion are then simulated within a small layer section and the spatially averaged results are employed in the full

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CI - Průmyslová chemie a chemické inženýrství

OECD FORD obor

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Projekt

<a href="/cs/project/GAP106%2F10%2F1568" target="_blank" >GAP106/10/1568: Optimalizace transportních a katalytických vlastností porézních materiálů na mikro- a nano-úrovni s využitím 3D digitální rekonstrukce</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2012

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

188

Číslo periodika v rámci svazku

neuveden

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

8

Strana od-do

62-69

Kód UT WoS článku

000305809300008

EID výsledku v databázi Scopus

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