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Kinetic Model for the Transformation of Bioethanol into Olefins over a HZSM-5 Zeolite Treated with Alkali / Ana G. Gayubo in Industrial & engineering chemistry research, Vol. 49 N° 21 (Novembre 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 21 (Novembre 2010) . - pp. 10836–10844 Titre : Kinetic Model for the Transformation of Bioethanol into Olefins over a HZSM-5 Zeolite Treated with Alkali Type de document : texte imprimé Auteurs : Ana G. Gayubo, Auteur ; Ainhoa Alonso, Auteur ; Beatriz Valle, Auteur Année de publication : 2011 Article en page(s) : pp. 10836–10844 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Kinetic  Bioethanol  Zeolite Résumé : A kinetic model for the transformation of bioethanol (aqueous ethanol into hydrocarbons) has been established for a catalyst with slow deactivation by coke (prepared from a HZSM-5 zeolite treated with alkali in order to moderate its acid strength and generate mesopores in the zeolite structure). The kinetic model allows quantifying the distribution of the lumps of products (ethylene, C3−C4 olefins, gasoline or C5−C10, and C1−C3 paraffins) and is particularly interesting for quantifying the production of C3−C4 olefin lump, which is the one of greater commercial interest. The experimental data have been obtained in an isothermal fixed-bed reactor in a wide range of operating conditions (temperature of 300−400 °C, space time and water content in the feed). The remarkable features of the kinetic model are (i) consideration of the autocatalytic formation of C3−C4 olefin lump following their reaction with ethylene, (ii) consideration of the combined involvement of ethylene and the light olefin lump in the formation of heavier hydrocarbons; and (i) quantification of the effect of water in the reaction medium, which attenuates the rate of each one of the steps in the kinetic scheme, except the dehydration of ethanol which is instantaneous under these conditions. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie100407d [article] Kinetic Model for the Transformation of Bioethanol into Olefins over a HZSM-5 Zeolite Treated with Alkali [texte imprimé] / Ana G. Gayubo, Auteur ; Ainhoa Alonso, Auteur ; Beatriz Valle, Auteur . - 2011 . - pp. 10836–10844. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 21 (Novembre 2010) . - pp. 10836–10844 Mots-clés : Kinetic  Bioethanol  Zeolite Résumé : A kinetic model for the transformation of bioethanol (aqueous ethanol into hydrocarbons) has been established for a catalyst with slow deactivation by coke (prepared from a HZSM-5 zeolite treated with alkali in order to moderate its acid strength and generate mesopores in the zeolite structure). The kinetic model allows quantifying the distribution of the lumps of products (ethylene, C3−C4 olefins, gasoline or C5−C10, and C1−C3 paraffins) and is particularly interesting for quantifying the production of C3−C4 olefin lump, which is the one of greater commercial interest. The experimental data have been obtained in an isothermal fixed-bed reactor in a wide range of operating conditions (temperature of 300−400 °C, space time and water content in the feed). The remarkable features of the kinetic model are (i) consideration of the autocatalytic formation of C3−C4 olefin lump following their reaction with ethylene, (ii) consideration of the combined involvement of ethylene and the light olefin lump in the formation of heavier hydrocarbons; and (i) quantification of the effect of water in the reaction medium, which attenuates the rate of each one of the steps in the kinetic scheme, except the dehydration of ethanol which is instantaneous under these conditions. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie100407d