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Ethylene oxide formation in a microreactor / Jose R. Hernandez Carucci 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. 10897–10907 Titre : Ethylene oxide formation in a microreactor : From qualitative kinetics to detailed modeling Type de document : texte imprimé Auteurs : Jose R. Hernandez Carucci, Auteur ; Ville Halonen, Auteur ; Kari Eranen, Auteur Année de publication : 2011 Article en page(s) : pp. 10897–10907 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Microreactor  Kinetics Résumé : Silver/α-alumina catalysts were wash-coated in stainless steel microchannels. The microchannels were used for the epoxidation of ethylene. Pure silver microplates were also investigated giving the highest activities and selectivities toward the ethylene oxide formation. Pretreatment conditions with oxygen and ethylene for the pure silver catalyst were studied and optimized. The experiments were carried out under atmospheric pressure, varying the temperature from 220 to 300 °C and the total gas flow from 5.4 to 10.5 cm3/min. A precise kinetic model for the ethylene oxide formation in pure silver microchannels was developed at 260 °C. The model was based on the competitive adsorption of ethylene and molecular oxygen over the silver surface. The concentrations of the reactants (oxygen and ethylene) in the gas flow were systematically varied from 5 to 25 vol % using helium gas as balance. The model was confronted with experimental data obtained in the microchannels, resulting in a very high degree of explanation (97%). ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie100521j [article] Ethylene oxide formation in a microreactor : From qualitative kinetics to detailed modeling [texte imprimé] / Jose R. Hernandez Carucci, Auteur ; Ville Halonen, Auteur ; Kari Eranen, Auteur . - 2011 . - pp. 10897–10907. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 21 (Novembre 2010) . - pp. 10897–10907 Mots-clés : Microreactor  Kinetics Résumé : Silver/α-alumina catalysts were wash-coated in stainless steel microchannels. The microchannels were used for the epoxidation of ethylene. Pure silver microplates were also investigated giving the highest activities and selectivities toward the ethylene oxide formation. Pretreatment conditions with oxygen and ethylene for the pure silver catalyst were studied and optimized. The experiments were carried out under atmospheric pressure, varying the temperature from 220 to 300 °C and the total gas flow from 5.4 to 10.5 cm3/min. A precise kinetic model for the ethylene oxide formation in pure silver microchannels was developed at 260 °C. The model was based on the competitive adsorption of ethylene and molecular oxygen over the silver surface. The concentrations of the reactants (oxygen and ethylene) in the gas flow were systematically varied from 5 to 25 vol % using helium gas as balance. The model was confronted with experimental data obtained in the microchannels, resulting in a very high degree of explanation (97%). ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie100521j