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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20401 - Chemical engineering (plants, products)

Projekt

<a href="/cs/project/GA19-22173S" target="_blank" >GA19-22173S: Mikrostruktura katalytických filtrů pro čištění automobilových výfukových plynů</a><br>

Návaznosti

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

Rok uplatnění

2022

Kód důvěrnosti údajů

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

Název periodika

Chemical Engineering Science

ISSN

0009-2509

e-ISSN

1873-4405

Svazek periodika

260

Číslo periodika v rámci svazku

OCT 12 2022

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

12

Strana od-do

117876

Kód UT WoS článku

000830884200009

EID výsledku v databázi Scopus

2-s2.0-85134506449