Design and operation of a preferential oxidation microdevice for a portable fuel processor

Delsman, E.R.; Croon, M.H.J.M. de; Pierik, Anke; Kramer, Gert Jan; Cobden, P.D.; Hofmann, C.; Cominos, V.; Schouten, J.C.

doi:10.1016/j.ces.2004.07.099

Cited by 66 publications

(42 citation statements)

References 6 publications

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“…This approach to control the CO-PrOx temperature is interesting from the point of view of the system integration as shown by Delsman et al [38]. These authors studied experimentally and by model simulation a microdevice consisting of a preferential oxidationheat exchanger unit constructed from microstructured stainless-steel plates and sized to feed a 100 W e fuel cell.…”

Section: Control Of the Co-prox Temperaturementioning

confidence: 99%

Selective CO removal over Au/CeFe and CeCu catalysts in microreactors studied through kinetic analysis and CFD simulations

Arzamendi

Uriz

Diéguez

et al. 2011

Chemical Engineering Journal

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Selective CO removal over Au/CeFe and CeCu catalysts in microreactors studied through kinetic analysis and CFD simulations, Chemical Engineering Journal (2010), doi:10.1016/j.cej.2010.08.083 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. E-mail address: lgandia@unavarra.es (L.M. Gandía) AbstractA kinetic study of the preferential oxidation of CO in H 2 rich streams (CO-PrOx) over a cerium-copper oxide (CeCu) and a gold catalyst supported on cerium-iron oxide (Au/CeFe) is presented. The gold catalyst is very active but the CeCu oxide is more selective. A kinetic model describing the CO-PrOx system with CO 2 and H 2 O in the feed has been formulated considering the oxidation of CO and H 2 and the reverse water-gas shift reaction. The rate equations have been implemented in computational fluid dynamics codes to study the influence of the operating variables on the CO-PrOx in microchannels and microslits. TheCeCu catalyst is the only one capable of achieving final CO contents below 10-100 ppmv.Due to the opposite effect of temperature on activity and selectivity there is an optimalPage 2 of 31 A c c e p t e d M a n u s c r i p t 2 temperature at which the CO content is minimal over CeCu. This temperature varies between 170 and 200 ºC as the GHSV increases from 10 000 to 50 000 h -1. Simulations have evidenced the very good heat transfer performance of the microdevices showing that the COPrOx temperature can be controlled using air as cooling fluid although the inlet temperature and flow rate should be carefully controlled to avoid reaction extinction. Both microchannels and microslits behaved similarly. The fact that the microslits are much easier to fabricate may be an interesting advantage in favor of that geometry in this case.

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Section: Control Of the Co-prox Temperaturementioning

confidence: 99%

Selective CO removal over Au/CeFe and CeCu catalysts in microreactors studied through kinetic analysis and CFD simulations

Arzamendi

Uriz

Diéguez

et al. 2011

Chemical Engineering Journal

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“…Typically, carbon monoxide is converted to carbon dioxide either in a separate water-gas shift reactor or a preferential oxidation called PROX (Delsman et al, 2004). Palladium/silver alloy membrane is also used to separate selectively the carbon monoxide.…”

Section: Fuel Reforming Process and Systemmentioning

confidence: 99%

Micro Power Generation from Micro Fuel Cell Combined with Micro Methanol Reformer

Kim¹

2009

Micro Electronic and Mechanical Systems

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“…Two inlet temperatures, 100 and 120 ºC, have been considered for the coolant stream. These values have been selected because they are close to that found in highly integrated portable fuel processors [16].…”

Section: Non-isothermal Simulationsmentioning

confidence: 99%

Preferential oxidation of CO over Au/CuOx–CeO2 catalyst in microstructured reactors studied through CFD simulations

et al. 2013

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Design and operation of a preferential oxidation microdevice for a portable fuel processor

Cited by 66 publications

References 6 publications

Selective CO removal over Au/CeFe and CeCu catalysts in microreactors studied through kinetic analysis and CFD simulations

Selective CO removal over Au/CeFe and CeCu catalysts in microreactors studied through kinetic analysis and CFD simulations

Micro Power Generation from Micro Fuel Cell Combined with Micro Methanol Reformer

Preferential oxidation of CO over Au/CuOx–CeO2 catalyst in microstructured reactors studied through CFD simulations

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