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Statements

Subject Item
n2:RIV%2F60461373%3A22340%2F04%3A00011102%21RIV%2F2005%2FMSM%2F223405%2FN
rdf:type
n15:Vysledek skos:Concept
dcterms:description
Two models of catalytic monolith reactor with diffusion in the washcoat are described, employing the nonstationary kinetics of CO and hydrocarbon oxidation, NOX reduction, and oxygen storage with 23 reaction steps. The first model describes the dynamic behavior in a short monolith (recirculation reactor or CSTR), and the second one is a spatially two-dimensional nonstationary model of the monolith with plug flow. The models are used to demonstrate the qualitative agreement between the observed nonlinear dynamics of CO oxidation, including hysteresis and periodic and period-doubled oscillations, and earlier experiments. The effects of transport parameters within the washcoat on the monolith lightoff and on the outlet conversions are simulated. Jsou popsány dva modely katalytického monolitického reaktoru s difusí v katalytické vrstvě, za použití nestacionární kinetiky oxidace CO a uhlovodíku, redukce NOX a ukládání kyslíku na povrchu (celkem 23 reakčních kroků). První model popisuje dynamické chování krátkého monolitu (míchaný reaktor, r. se zpětným tokem) a druhý je prostorově dvourozměrný model monolitu s pístovým tokem. Je ukázána kvalitativní shoda mezi nelineární dynamikou oxidace CO, zahrnující hysteresi, oscilace a zdvojení periody, pozorovanou v modelu, a staršími experimenty. Dále je simulován vliv transportních parametrů v katalytické vrstvě na zapálení reakce a výstupní konverse. Two models of catalytic monolith reactor with diffusion in the washcoat are described, employing the nonstationary kinetics of CO and hydrocarbon oxidation, NOX reduction, and oxygen storage with 23 reaction steps. The first model describes the dynamic behavior in a short monolith (recirculation reactor or CSTR), and the second one is a spatially two-dimensional nonstationary model of the monolith with plug flow. The models are used to demonstrate the qualitative agreement between the observed nonlinear dynamics of CO oxidation, including hysteresis and periodic and period-doubled oscillations, and earlier experiments. The effects of transport parameters within the washcoat on the monolith lightoff and on the outlet conversions are simulated.
dcterms:title
Modelling of TWC monolith converters with microkinetics and diffusion in the washcoat Modelování trojcestného katalysátoru s mikrokinetikou a vnitřní difusí v katalytické vrstvě Modelling of TWC monolith converters with microkinetics and diffusion in the washcoat
skos:prefLabel
Modelling of TWC monolith converters with microkinetics and diffusion in the washcoat Modelling of TWC monolith converters with microkinetics and diffusion in the washcoat Modelování trojcestného katalysátoru s mikrokinetikou a vnitřní difusí v katalytické vrstvě
skos:notation
RIV/60461373:22340/04:00011102!RIV/2005/MSM/223405/N
n5:strany
4503-4510
n5:aktivita
n17:Z
n5:aktivity
Z(MSM 223400007)
n5:cisloPeriodika
16
n5:dodaniDat
n14:2005
n5:domaciTvurceVysledku
n12:4562909 n12:4292367 n12:2115204
n5:druhVysledku
n10:J
n5:duvernostUdaju
n16:S
n5:entitaPredkladatele
n13:predkladatel
n5:idSjednocenehoVysledku
574062
n5:idVysledku
RIV/60461373:22340/04:00011102
n5:jazykVysledku
n6:eng
n5:klicovaSlova
internal diffusion;microkinetics;three-way catalyst;monolith;modelling
n5:klicoveSlovo
n9:monolith n9:modelling n9:three-way%20catalyst n9:microkinetics n9:internal%20diffusion
n5:kodStatuVydavatele
US - Spojené státy americké
n5:kontrolniKodProRIV
[1F776B3BB148]
n5:nazevZdroje
Ind.Eng.Chem., Res.
n5:obor
n18:CI
n5:pocetDomacichTvurcuVysledku
3
n5:pocetTvurcuVysledku
3
n5:rokUplatneniVysledku
n14:2004
n5:svazekPeriodika
43
n5:tvurceVysledku
Kočí, Petr Kubíček, Milan Marek, Miloš
n5:zamer
n7:MSM%20223400007
s:issn
0888-5885
s:numberOfPages
8
n8:organizacniJednotka
22340