Structural characterisation of catalysed particulate filters for automotive exhaust gas treatment

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F17%3A43914112" target="_blank" >RIV/60461373:22340/17:43914112 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Structural characterisation of catalysed particulate filters for automotive exhaust gas treatment

Original language description

Combustion engines produce both gaseous and solid pollutants which are limited by emission standards. In order to pass the latest standards, size- and cost-requirements of modern exhaust gas aftertreatment systems are growing and more compact multi-functional units need to be developed. A promising solution is the application of catalytically active washcoat directly into the porous structure of a particulate filter. Several requirements need to be met in catalysed particulate filters simultaneously: high filtration efficiency and catalytic activity and low pressure loss ? thorough structural characterisation has to be carried out to optimise the filter performance. In the scope of this work, three samples of catalysed Diesel particulate filters (bare SiC substrate and SiC loaded with two different loadings of SCR catalyst for NOx reduction) were characterised by a combination of techniques: SEM, X-ray tomography (XRT) and mercury porosimetry. Strengths and weaknesses of all techniques were identified and a methodology for effective structural characterisation of catalysed filters was proposed ? the studied parameters included washcoat distribution and volume fractions of individual phases (substrate, washcoat and pores = porosity) obtained from image segmentation. The 3D images reconstructed from XRT can further be used as the input for mathematical models evaluating porosity, pore size distribution (PSD), effective diffusivity and tortuosity and gas flow simulations by CFD in order to predict pressure loss of the filter.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

20401 - Chemical engineering (plants, products)

Project

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Continuities

S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2017

Confidentiality

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

Article name in the collection

PROCEEDINGS 44th International Conference of the Slovak Society of Chemical Engineering

ISBN

978-80-89597-58-1

ISSN

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e-ISSN

neuvedeno

Number of pages

7

Pages from-to

724-730

Publisher name

Slovak Society of Chemical Engineering

Place of publication

Bratislava

Event location

Demänovská dolina

Event date

May 22, 2017

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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