. . "10.1016/j.ces.2014.07.039" . . . "On the measurement of transport parameters of porous solids in permeation and Wicke-Kallenbach cells" . . . "22310" . . "34460" . "I, P(GAP204/11/1206)" . "3"^^ . "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"@en . . "Sensitivity analysis Pore networkmodelling Knudsen flow Slip flow Viscous flow Isobaric counter-currentdiffusion"@en . "2"^^ . . . "US - Spojen\u00E9 st\u00E1ty americk\u00E9" . "Hejtm\u00E1nek, Vladim\u00EDr" . "2014" . "\u010Capek, Pavel" . . . "RIV/60461373:22310/14:43897139!RIV15-GA0-22310___" . "16"^^ . "On the measurement of transport parameters of porous solids in permeation and Wicke-Kallenbach cells" . . "Vesel\u00FD, Martin" . "On the measurement of transport parameters of porous solids in permeation and Wicke-Kallenbach cells"@en . "0009-2509" . "On the measurement of transport parameters of porous solids in permeation and Wicke-Kallenbach cells"@en . . "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" . "[DEC940A9ADD4]" . "Chemical Engineering Science" . "http://www.sciencedirect.com/science/article/pii/S0009250914003844#" . "118" . . "RIV/60461373:22310/14:43897139" .