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Effective Diffusivities of Gases in a Reconstructed Porous Body

The result's identifiers

  • 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

Alternative languages

  • 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.

Classification

  • Type

    J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

  • CEP classification

    CI - Industrial chemistry and chemical engineering

  • OECD FORD branch

Result continuities

  • 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)

Others

  • Publication year

    2008

  • Confidentiality

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

Data specific for result type

  • 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