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Description
  • Operation of Pt-Rh/Ce/?-Al2O3 three-way catalytic converter (TWC) with periodic variations of the inlet oxygen concentration is simulated. The effects of the forcing frequency and amplitude on the light-off andtime-averaged conversions of CO, hydrocarbons (HC) and nitrogen oxides NOX are studied. The influence of oxygen storage capacity (OSC) and effective diffusivity in the washcoat are also examined. The results are discussed on the basis of computed spatiotemporal concentration patterns in the catalytic washcoat. Earlier light-off (i.e., at lower temperature) and higher time-averaged conversions are observed for the forced TWC in comparison with the TWC operated without oscillations in inlet O2 concentration.
  • Operation of Pt-Rh/Ce/?-Al2O3 three-way catalytic converter (TWC) with periodic variations of the inlet oxygen concentration is simulated. The effects of the forcing frequency and amplitude on the light-off andtime-averaged conversions of CO, hydrocarbons (HC) and nitrogen oxides NOX are studied. The influence of oxygen storage capacity (OSC) and effective diffusivity in the washcoat are also examined. The results are discussed on the basis of computed spatiotemporal concentration patterns in the catalytic washcoat. Earlier light-off (i.e., at lower temperature) and higher time-averaged conversions are observed for the forced TWC in comparison with the TWC operated without oscillations in inlet O2 concentration. (en)
  • Je simulován provoz trojcestného katalysátoru Pt-Rh/Ce/?-Al2O3 s periodickou změnou vstupních koncentrací kyslíku. Je studován vliv frekvence a amplitudy oscilací koncentrace O2 na časově zprůměrněné výstupní konverse CO, uhlovodíků (HC) a oxidů dusíku (NOX). Dále je zkoumán vliv kapacity pro ukládání kyslíku a efektivní difusivity v katalytické vrstvě. Výsledky jsou diskutovány na základě vypočtených časoprostorových koncentračních profilů v katalytické vrstvě. Ve srovnání s provozem s neměnnou vstupní koncentrací kyslíku jsou pozorovány vyšší průměrné konverse a dřívější zapálení reakce. (cs)
Title
  • Periodická změna vstupních podmínek trojcestného katalysátoru s difusí v katalytické vrstvě (cs)
  • Periodic forcing of three-way catalyst with diffusion in the washcoat
  • Periodic forcing of three-way catalyst with diffusion in the washcoat (en)
skos:prefLabel
  • Periodická změna vstupních podmínek trojcestného katalysátoru s difusí v katalytické vrstvě (cs)
  • Periodic forcing of three-way catalyst with diffusion in the washcoat
  • Periodic forcing of three-way catalyst with diffusion in the washcoat (en)
skos:notation
  • RIV/60461373:22340/04:00013170!RIV/2005/GA0/223405/N
http://linked.open.../vavai/riv/strany
  • 345-355
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • P(GA104/02/0339), Z(MSM 223400007)
http://linked.open...iv/cisloPeriodika
  • 3
http://linked.open...vai/riv/dodaniDat
http://linked.open...aciTvurceVysledku
http://linked.open.../riv/druhVysledku
http://linked.open...iv/duvernostUdaju
http://linked.open...titaPredkladatele
http://linked.open...dnocenehoVysledku
  • 579132
http://linked.open...ai/riv/idVysledku
  • RIV/60461373:22340/04:00013170
http://linked.open...riv/jazykVysledku
http://linked.open.../riv/klicovaSlova
  • TWC;Catalytic reactor;Exhaust gas conversion;Periodic forcing (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...odStatuVydavatele
  • NL - Nizozemsko
http://linked.open...ontrolniKodProRIV
  • [C13070D5B83F]
http://linked.open...i/riv/nazevZdroje
  • Catalysis Today
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
  • 98
http://linked.open...iv/tvurceVysledku
  • Kočí, Petr
  • Kubíček, Milan
  • Marek, Miloš
http://linked.open...n/vavai/riv/zamer
issn
  • 0920-5861
number of pages
http://localhost/t...ganizacniJednotka
  • 22340
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