Effective Diffusivities of Gases in a Reconstructed Porous Body

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F08%3A00020044" target="_blank" >RIV/60461373:22310/08:00020044 - isvavai.cz</a>

Alternative codes found

RIV/67985858:_____/08:00315769 RIV/61388955:_____/08:00315769

Result on the web

—

DOI - Digital Object Identifier

—

Result language

čeština

Original language name

Effective Diffusivities of Gases in a Reconstructed Porous Body

Original language description

Two models of a porous body, a 3D replica obtained by stochastic reconstruction and a random pore network, were evaluated with reference to the effective diffusivities of gases. Stochastic reconstruction was applied to statistical information extracted from images of 2D cuts through the porous medium. The pore network was derived in such a way that the total porosity, pore-size function, mean coordination number and mercury intrusion curve were all in good agreement with the experimental data. The simulator used to model steady diffusion flow in the pore network slightly overestimated effective diffusivity, while direct calculation of effective diffusivity, by using random-walk simulation in the 3D replica, delivered a value that was lower than its experimental counterpart. However, both deviations were within tolerable limits.

Czech name

Effective Diffusivities of Gases in a Reconstructed Porous Body

Czech description

Two models of a porous body, a 3D replica obtained by stochastic reconstruction and a random pore network, were evaluated with reference to the effective diffusivities of gases. Stochastic reconstruction was applied to statistical information extracted from images of 2D cuts through the porous medium. The pore network was derived in such a way that the total porosity, pore-size function, mean coordination number and mercury intrusion curve were all in good agreement with the experimental data. The simulator used to model steady diffusion flow in the pore network slightly overestimated effective diffusivity, while direct calculation of effective diffusivity, by using random-walk simulation in the 3D replica, delivered a value that was lower than its experimental counterpart. However, both deviations were within tolerable limits.

Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

CI - Industrial chemistry and chemical engineering

OECD FORD branch

—

Project

<a href="/en/project/GA203%2F05%2F0347" target="_blank" >GA203/05/0347: Porous Catalysts and Membrane Supports: A Relationship Between Mass Transport and Textural Properties</a><br>

Continuities

Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2008

Confidentiality

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

Name of the periodical

Chemical Engineering Research and Design - Part A

ISSN

0263-8762

e-ISSN

—

Volume of the periodical

—

Issue of the periodical within the volume

86

Country of publishing house

GB - UNITED KINGDOM

Number of pages

10

Pages from-to

—

UT code for WoS article

000258545800007

EID of the result in the Scopus database

—