Investigation of Double-Stage Preferential CO Oxidation Reactor over Bimetallic Au−Pt Supported on A-Zeolite Catalyst / Apanee Luengnaruemitchai in Industrial & engineering chemistry research, Vol. 47 n°21 (Novembre 2008)

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 47 n°21 (Novembre 2008) . - p. 8160–8165 Titre : Investigation of Double-Stage Preferential CO Oxidation Reactor over Bimetallic Au−Pt Supported on A-Zeolite Catalyst Type de document : texte imprimé Auteurs : Apanee Luengnaruemitchai, Auteur ; pattarasuda Naknam, Auteur ; sujitra wogkasemjit, Auteur Année de publication : 2008 Article en page(s) : p. 8160–8165 Note générale : chemical engineering Langues : Anglais (eng) Mots-clés : CO oxidation Résumé : This article presents experiment data on the preferential CO oxidation (PROX) in a hydrogen-rich stream, currently the most practical method for CO removal induced by a double-stage process. The reaction was carried out in a microreactor testing unit using Au and Pt supported on an A zeolite catalyst in the temperature range of 50−300 °C under atmospheric pressure. The reactant gas mixture contained CO (1%), O2 (1%), H2 (40%), CO2 (0−10%), and H2O (0−10%), with the balance being He, at a total flow rate of 50 mL/min. The results clearly show that the addition of the second stage significantly reduces the H2 loss and the O2 requirements while greatly increasing the CO selectivity from ∼48 to ∼58%. The addition of CO2 and H2O in the feed slightly reduces the CO oxidation activity both in single- and double-stage processes. Moreover, the double-stage process shows a CO removal efficiency of over 99% during 60 h of testing at a reaction temperature of 170 °C in the simulated reformed gas (CO2- and H2O-free [article] Investigation of Double-Stage Preferential CO Oxidation Reactor over Bimetallic Au−Pt Supported on A-Zeolite Catalyst [texte imprimé] / Apanee Luengnaruemitchai, Auteur ; pattarasuda Naknam, Auteur ; sujitra wogkasemjit, Auteur . - 2008 . - p. 8160–8165. chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 47 n°21 (Novembre 2008) . - p. 8160–8165 Mots-clés : CO oxidation Résumé : This article presents experiment data on the preferential CO oxidation (PROX) in a hydrogen-rich stream, currently the most practical method for CO removal induced by a double-stage process. The reaction was carried out in a microreactor testing unit using Au and Pt supported on an A zeolite catalyst in the temperature range of 50−300 °C under atmospheric pressure. The reactant gas mixture contained CO (1%), O2 (1%), H2 (40%), CO2 (0−10%), and H2O (0−10%), with the balance being He, at a total flow rate of 50 mL/min. The results clearly show that the addition of the second stage significantly reduces the H2 loss and the O2 requirements while greatly increasing the CO selectivity from ∼48 to ∼58%. The addition of CO2 and H2O in the feed slightly reduces the CO oxidation activity both in single- and double-stage processes. Moreover, the double-stage process shows a CO removal efficiency of over 99% during 60 h of testing at a reaction temperature of 170 °C in the simulated reformed gas (CO2- and H2O-free

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