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Pt-Sn/MgAl2O4 as n-butane dehydrogenation catalyst in a two-zone fluidized-bed reactor / M. P. Lobera in Industrial & engineering chemistry research, Vol. 48 N° 14 (Juillet 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 14 (Juillet 2009) . - pp. 6573–6578 Titre : Pt-Sn/MgAl2O4 as n-butane dehydrogenation catalyst in a two-zone fluidized-bed reactor Type de document : texte imprimé Auteurs : M. P. Lobera, Auteur ; C. Téllez, Auteur ; J. Herguido, Auteur Année de publication : 2009 Article en page(s) : pp. 6573–6578 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : n-Butane  dehydrogenation  Pt-Sn/MgAl2O4  catalyst  Two-zone  fluidized-bed  reactor Résumé : n-Butane dehydrogenation over a Pt-Sn/MgAl2O4 catalyst has been carried out in a two-zone fluidized-bed reactor (TZFBR), where oxidation and reduction of this catalyst occurs in the same vessel but in separate zones. This allows working in a continuous mode with in situ catalyst regeneration, unlike traditional systems that require two different reactors or a single reactor with periodic operation. The effect of the main TZFBR operating variables was studied and its performance compared with that of a conventional fluidized-bed reactor loaded with the same catalyst and with other reactor + catalyst systems. Compared with a previous work in a similar reactor with another catalyst, the selectivity is improved because of the lower tendency to coke formation of the Pt-Sn/MgAl2O4 catalyst. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900381p [article] Pt-Sn/MgAl2O4 as n-butane dehydrogenation catalyst in a two-zone fluidized-bed reactor [texte imprimé] / M. P. Lobera, Auteur ; C. Téllez, Auteur ; J. Herguido, Auteur . - 2009 . - pp. 6573–6578. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 14 (Juillet 2009) . - pp. 6573–6578 Mots-clés : n-Butane  dehydrogenation  Pt-Sn/MgAl2O4  catalyst  Two-zone  fluidized-bed  reactor Résumé : n-Butane dehydrogenation over a Pt-Sn/MgAl2O4 catalyst has been carried out in a two-zone fluidized-bed reactor (TZFBR), where oxidation and reduction of this catalyst occurs in the same vessel but in separate zones. This allows working in a continuous mode with in situ catalyst regeneration, unlike traditional systems that require two different reactors or a single reactor with periodic operation. The effect of the main TZFBR operating variables was studied and its performance compared with that of a conventional fluidized-bed reactor loaded with the same catalyst and with other reactor + catalyst systems. Compared with a previous work in a similar reactor with another catalyst, the selectivity is improved because of the lower tendency to coke formation of the Pt-Sn/MgAl2O4 catalyst. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900381p

Stable steam reforming of ethanol in a two - zone fluidized - bed reactor / L. Pérez-Moreno in Industrial & engineering chemistry research, Vol. 51 N° 26 (Juillet 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 26 (Juillet 2012) . - pp. 8840-8848 Titre : Stable steam reforming of ethanol in a two - zone fluidized - bed reactor Type de document : texte imprimé Auteurs : L. Pérez-Moreno, Auteur ; J. Soler, Auteur ; J. Herguido, Auteur Année de publication : 2012 Article en page(s) : pp. 8840-8848 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Fluidized  bed  reactor  Steam  reforming Résumé : The oxidative steam reforming of ethanol in a two-zone fluidized-bed reactor (TZFBR) and in a conventional fluidized-bed reactor over a Ni/Al2O3 catalyst has been investigated. Catalyst deactivation has been studied for both contact modes. Coke generation has been verified by several techniques, and a stable performance was obtained in the TZFBR, where coke formation was counteracted with continuous catalyst regeneration. The effects of the main operating variables (steam/ethanol ratio S/E, oxygen/ethanol ratio O/E, temperature, and relative velocity with respect to the minimum fluidization velocity) have been studied. Both stable results and continuous operation without catalyst deactivation were achieved in the TZFBR in a wide range of S/E values, showing its viability for carrying out this process. High hydrogen selectivity with total conversion of ethanol was achieved even at low S/E and O/E ratios. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26107438 [article] Stable steam reforming of ethanol in a two - zone fluidized - bed reactor [texte imprimé] / L. Pérez-Moreno, Auteur ; J. Soler, Auteur ; J. Herguido, Auteur . - 2012 . - pp. 8840-8848. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 26 (Juillet 2012) . - pp. 8840-8848 Mots-clés : Fluidized  bed  reactor  Steam  reforming Résumé : The oxidative steam reforming of ethanol in a two-zone fluidized-bed reactor (TZFBR) and in a conventional fluidized-bed reactor over a Ni/Al2O3 catalyst has been investigated. Catalyst deactivation has been studied for both contact modes. Coke generation has been verified by several techniques, and a stable performance was obtained in the TZFBR, where coke formation was counteracted with continuous catalyst regeneration. The effects of the main operating variables (steam/ethanol ratio S/E, oxygen/ethanol ratio O/E, temperature, and relative velocity with respect to the minimum fluidization velocity) have been studied. Both stable results and continuous operation without catalyst deactivation were achieved in the TZFBR in a wide range of S/E values, showing its viability for carrying out this process. High hydrogen selectivity with total conversion of ethanol was achieved even at low S/E and O/E ratios. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26107438