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Statements

Subject Item
n2:RIV%2F60461373%3A22310%2F14%3A43897139%21RIV15-GA0-22310___
rdf:type
skos:Concept n10:Vysledek
rdfs:seeAlso
http://www.sciencedirect.com/science/article/pii/S0009250914003844#
dcterms:description
Wepresentsensitivityanalysisofgastransportproblemsrelatedtoexperimentalsetupsthatare routinelyusedfordeterminationofeffectivetransportparametersofmacroporoussolids.Therelevance of largetotalpressurevariationstoreliableestimationoftheeffectivetransportparametersis emphasized intwoexperimentalsetups,particularlyquasistationarypermeationandclassicalWicke- Kallenbach cells.Itisshownthatvariationsofothersystemparameters,suchastemperature,numberof gases orinlet flow ratescannotresembletheefficiency oftotalpressurechangesinestimatingthe parameters.FortheclassicalWicke-Kallenbach cellandbinarymixtures,itwasfoundthatthereare narrowintervalsofoutletmolefractionsinwhichtherelatedboundary-valueproblemexhibitsthe maximum sensitivitytomodifications ofthetransportparameters,i.e.therearetheoptimalconditions for regressionanalysis.Theruleofadjustingtheoptimalconditionsissimple:theoutletmolefractions, which caneasilybecontrolledbysettingtheinlet flow rates,mustbeclosetothemiddleoftheir admissible intervals.Porenetworkmodellingsupportedtheseresultsandhelpedusrevealasourceof systematicdeviationsbetweentheeffectivetransportparametersobtainedeitherfrompermeation experimentsorfromdiffusionexperiments.Specifically,theoverallnetwork flow rateresultingfrom non-linear functionalrelationshipsbetween fluxesanddrivingforcesontheporescaleandfromthelaw of massconservationinnetworknodesdoesnotexactlyconformtothesimilar flowratebasedonthe effectiveparametersifthetotalpressurespanislarge.Consequently,biasedvaluesoftheeffective transport parameterscounterbalancethedeficiency oftheassociatedmodels Wepresentsensitivityanalysisofgastransportproblemsrelatedtoexperimentalsetupsthatare routinelyusedfordeterminationofeffectivetransportparametersofmacroporoussolids.Therelevance of largetotalpressurevariationstoreliableestimationoftheeffectivetransportparametersis emphasized intwoexperimentalsetups,particularlyquasistationarypermeationandclassicalWicke- Kallenbach cells.Itisshownthatvariationsofothersystemparameters,suchastemperature,numberof gases orinlet flow ratescannotresembletheefficiency oftotalpressurechangesinestimatingthe parameters.FortheclassicalWicke-Kallenbach cellandbinarymixtures,itwasfoundthatthereare narrowintervalsofoutletmolefractionsinwhichtherelatedboundary-valueproblemexhibitsthe maximum sensitivitytomodifications ofthetransportparameters,i.e.therearetheoptimalconditions for regressionanalysis.Theruleofadjustingtheoptimalconditionsissimple:theoutletmolefractions, which caneasilybecontrolledbysettingtheinlet flow rates,mustbeclosetothemiddleoftheir admissible intervals.Porenetworkmodellingsupportedtheseresultsandhelpedusrevealasourceof systematicdeviationsbetweentheeffectivetransportparametersobtainedeitherfrompermeation experimentsorfromdiffusionexperiments.Specifically,theoverallnetwork flow rateresultingfrom non-linear functionalrelationshipsbetween fluxesanddrivingforcesontheporescaleandfromthelaw of massconservationinnetworknodesdoesnotexactlyconformtothesimilar flowratebasedonthe effectiveparametersifthetotalpressurespanislarge.Consequently,biasedvaluesoftheeffective transport parameterscounterbalancethedeficiency oftheassociatedmodels
dcterms:title
On the measurement of transport parameters of porous solids in permeation and Wicke-Kallenbach cells On the measurement of transport parameters of porous solids in permeation and Wicke-Kallenbach cells
skos:prefLabel
On the measurement of transport parameters of porous solids in permeation and Wicke-Kallenbach cells On the measurement of transport parameters of porous solids in permeation and Wicke-Kallenbach cells
skos:notation
RIV/60461373:22310/14:43897139!RIV15-GA0-22310___
n3:aktivita
n5:I n5:P
n3:aktivity
I, P(GAP204/11/1206)
n3:cisloPeriodika
2014
n3:dodaniDat
n12:2015
n3:domaciTvurceVysledku
n13:5259886 n13:4946189
n3:druhVysledku
n4:J
n3:duvernostUdaju
n20:S
n3:entitaPredkladatele
n7:predkladatel
n3:idSjednocenehoVysledku
34460
n3:idVysledku
RIV/60461373:22310/14:43897139
n3:jazykVysledku
n14:eng
n3:klicovaSlova
Sensitivity analysis Pore networkmodelling Knudsen flow Slip flow Viscous flow Isobaric counter-currentdiffusion
n3:klicoveSlovo
n16:Sensitivity%20analysis%20Pore%20networkmodelling%20Knudsen%20flow%20Slip%20flow%20Viscous%20flow%20Isobaric%20counter-currentdiffusion
n3:kodStatuVydavatele
US - Spojené státy americké
n3:kontrolniKodProRIV
[DEC940A9ADD4]
n3:nazevZdroje
Chemical Engineering Science
n3:obor
n18:CF
n3:pocetDomacichTvurcuVysledku
2
n3:pocetTvurcuVysledku
3
n3:projekt
n15:GAP204%2F11%2F1206
n3:rokUplatneniVysledku
n12:2014
n3:svazekPeriodika
118
n3:tvurceVysledku
Hejtmánek, Vladimír Čapek, Pavel Veselý, Martin
s:issn
0009-2509
s:numberOfPages
16
n6:doi
10.1016/j.ces.2014.07.039
n11:organizacniJednotka
22310