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Effect of sulfur poisoning in high pressure catalytic partial oxidation of methane over Rh−Ce/Al2O3 catalyst / Jin Ki Hong in Industrial & engineering chemistry research, Vol. 50 N° 8 (Avril 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 8 (Avril 2011) . - pp. 4373–4380 Titre : Effect of sulfur poisoning in high pressure catalytic partial oxidation of methane over Rh−Ce/Al2O3 catalyst Type de document : texte imprimé Auteurs : Jin Ki Hong, Auteur ; Lingzhi Zhang, Auteur ; Mark Thompson, Auteur Année de publication : 2011 Article en page(s) : pp. 4373–4380 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Catalytic  partial  Oxidation  Methane Résumé : Short contact time catalytic partial oxidation (CPO) of methane has received increasing attention in industrial applications. Understanding of the catalytic system under high pressure and in the presence of sulfur represents a key challenge of this technology. This paper discusses CPO performance using a Rh−Ce catalyst supported on washcoat alumina foam under industrial relevant operating conditions (pressure up to 160 psig and different sulfur levels up to 16 ppm in methane). A long-term experimental run cycling between sulfur-free and sulfur injection conditions was conducted to examine the influence of sulfur on the catalyst. Sulfur effects were also evaluated under different sulfur levels and with different feed compositions. A dual zone reaction model was used to explain the effects of pressure, sulfur level, and the O/C ratio on CPO catalytic performance. Engineering challenges and requirements of the CPO process for industrial applications were discussed on the basis of recent advances in the understanding of CPO chemistry. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie102159w [article] Effect of sulfur poisoning in high pressure catalytic partial oxidation of methane over Rh−Ce/Al2O3 catalyst [texte imprimé] / Jin Ki Hong, Auteur ; Lingzhi Zhang, Auteur ; Mark Thompson, Auteur . - 2011 . - pp. 4373–4380. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 8 (Avril 2011) . - pp. 4373–4380 Mots-clés : Catalytic  partial  Oxidation  Methane Résumé : Short contact time catalytic partial oxidation (CPO) of methane has received increasing attention in industrial applications. Understanding of the catalytic system under high pressure and in the presence of sulfur represents a key challenge of this technology. This paper discusses CPO performance using a Rh−Ce catalyst supported on washcoat alumina foam under industrial relevant operating conditions (pressure up to 160 psig and different sulfur levels up to 16 ppm in methane). A long-term experimental run cycling between sulfur-free and sulfur injection conditions was conducted to examine the influence of sulfur on the catalyst. Sulfur effects were also evaluated under different sulfur levels and with different feed compositions. A dual zone reaction model was used to explain the effects of pressure, sulfur level, and the O/C ratio on CPO catalytic performance. Engineering challenges and requirements of the CPO process for industrial applications were discussed on the basis of recent advances in the understanding of CPO chemistry. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie102159w

Investigation of the reaction network in ethanol steam reforming over supported cobalt catalysts / Hua, Song in Industrial & engineering chemistry research, Vol. 49 N° 19 (Octobre 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 19 (Octobre 2010) . - pp. 8984–8989 Titre : Investigation of the reaction network in ethanol steam reforming over supported cobalt catalysts Type de document : texte imprimé Auteurs : Hua, Song, Auteur ; Lingzhi Zhang, Auteur ; Umit S. Ozkan, Auteur Année de publication : 2010 Article en page(s) : pp. 8984–8989 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Ethanol  steam  Isotopic  labeling  Catalysts Résumé : In this study, a network of reactions involved in the ethanol steam reforming (ESR) over supported Co catalysts has been investigated using temperature-programmed reaction (TPRxn) and isotopic labeling techniques. The products and intermediates in the gas phase have been monitored by mass spectrometry (MS) as a function of temperature. Ethanol conversion and product distribution obtained in steady-state reaction experiments have also been presented. The results point to a complex network of reactions that directly impact the selectivity and H2 yield that can be obtained in ethanol steam reforming. The reaction network is governed by the temperature range as well as the type of catalyst used, with catalysts exhibiting higher oxygen mobility favoring complete oxidation of ethanol to CO2 and leading to increased hydrogen yield as well as improved stability. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie100006z [article] Investigation of the reaction network in ethanol steam reforming over supported cobalt catalysts [texte imprimé] / Hua, Song, Auteur ; Lingzhi Zhang, Auteur ; Umit S. Ozkan, Auteur . - 2010 . - pp. 8984–8989. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 19 (Octobre 2010) . - pp. 8984–8989 Mots-clés : Ethanol  steam  Isotopic  labeling  Catalysts Résumé : In this study, a network of reactions involved in the ethanol steam reforming (ESR) over supported Co catalysts has been investigated using temperature-programmed reaction (TPRxn) and isotopic labeling techniques. The products and intermediates in the gas phase have been monitored by mass spectrometry (MS) as a function of temperature. Ethanol conversion and product distribution obtained in steady-state reaction experiments have also been presented. The results point to a complex network of reactions that directly impact the selectivity and H2 yield that can be obtained in ethanol steam reforming. The reaction network is governed by the temperature range as well as the type of catalyst used, with catalysts exhibiting higher oxygen mobility favoring complete oxidation of ethanol to CO2 and leading to increased hydrogen yield as well as improved stability. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie100006z