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  • Byla provedena řada měření protiproudé difuze ve Wicke-Kallenbachově a Grahmově cele s porézními vzorky, jejichž velikost poloměrů pórů pokrývala oblast 78 nm až 10 mikronů. Vzájemná shoda difuzních toků získaných z obou cel byla zaznamenána v celém rozsahu velikostí pórů. V případě vzorků s poloměry pórů přesahujícími 5 mikronů dodatečný permeační tok vyvolaný diferenciální velikostí tlakového rozdílu v difuzní cele znemožnil použití Grahamova zákona pro věrohodné vyhodnocení transportních parametrů porézních látek. Transportní parametry společně s 95 % oblastí spolehlivosti byly vyhodnoceny pro vzorky s póry o poloměrech do 5 mikronů a převažující mechanismus difuzního transportu byl určen na základě tvaru oblastí spolehlivosti. (cs)
  • Counter-current gas diffusion measurements on a series of porous solids covering a broad range of pore sizes (mean pore radii between 78 nm and 10 microns) were performed in the Wicke-Kallenbach and Graham’s diffusion cells. Mutual agreement of diffusion fluxes from both cells was found in the whole range of tested pore radii and inert gas systems. For pore materials with mean pore radii exceeding 5 microns the experimentally unavoidable tiny total pressure gradient induces additional permeation flow which precludes the use of Graham’s law for evaluation of transport parameters of the porous solids.Transport parameters together with 95% confidence regions were determined for porous materials with pore radii up to 5 microns and the prevailing diffusion mechanism, intimately connected with the shape of confidence regions, was estimated.
  • Counter-current gas diffusion measurements on a series of porous solids covering a broad range of pore sizes (mean pore radii between 78 nm and 10 microns) were performed in the Wicke-Kallenbach and Graham’s diffusion cells. Mutual agreement of diffusion fluxes from both cells was found in the whole range of tested pore radii and inert gas systems. For pore materials with mean pore radii exceeding 5 microns the experimentally unavoidable tiny total pressure gradient induces additional permeation flow which precludes the use of Graham’s law for evaluation of transport parameters of the porous solids.Transport parameters together with 95% confidence regions were determined for porous materials with pore radii up to 5 microns and the prevailing diffusion mechanism, intimately connected with the shape of confidence regions, was estimated. (en)
Title
  • Comparison of Wicke-Kallenbach and Graham’s Diffusion Cells for Obtaining Transport Characteristics of Porous Solids.
  • Comparison of Wicke-Kallenbach and Graham’s Diffusion Cells for Obtaining Transport Characteristics of Porous Solids. (en)
  • Porovnání Wicke-Kallenbachovy a Grahamovy cely pro získávání charakteristik porézních látek. (cs)
skos:prefLabel
  • Comparison of Wicke-Kallenbach and Graham’s Diffusion Cells for Obtaining Transport Characteristics of Porous Solids.
  • Comparison of Wicke-Kallenbach and Graham’s Diffusion Cells for Obtaining Transport Characteristics of Porous Solids. (en)
  • Porovnání Wicke-Kallenbachovy a Grahamovy cely pro získávání charakteristik porézních látek. (cs)
skos:notation
  • RIV/67985858:_____/08:00099435!RIV08-AV0-67985858
http://linked.open.../vavai/riv/strany
  • 1003;1011
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • P(GD203/03/H140), P(IAA4072404), Z(AV0Z40720504)
http://linked.open...iv/cisloPeriodika
  • 4
http://linked.open...vai/riv/dodaniDat
http://linked.open...aciTvurceVysledku
http://linked.open.../riv/druhVysledku
http://linked.open...iv/duvernostUdaju
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http://linked.open...dnocenehoVysledku
  • 360714
http://linked.open...ai/riv/idVysledku
  • RIV/67985858:_____/08:00099435
http://linked.open...riv/jazykVysledku
http://linked.open.../riv/klicovaSlova
  • diffusion; graham’s law; porous media (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...odStatuVydavatele
  • GB - Spojené království Velké Británie a Severního Irska
http://linked.open...ontrolniKodProRIV
  • [F265066FF33F]
http://linked.open...i/riv/nazevZdroje
  • Chemical Engineering Science
http://linked.open...in/vavai/riv/obor
http://linked.open...ichTvurcuVysledku
http://linked.open...cetTvurcuVysledku
http://linked.open...vavai/riv/projekt
http://linked.open...UplatneniVysledku
http://linked.open...v/svazekPeriodika
  • 63
http://linked.open...iv/tvurceVysledku
  • Schneider, Petr
  • Šolcová, Olga
  • Soukup, Karel
http://linked.open...n/vavai/riv/zamer
issn
  • 0009-2509
number of pages
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