Long - term deactivation of supported Pt catalysts in the dehydrogenation of methylcyclohexane to toluene / Faisal Alhumaidan in Industrial & engineering chemistry research, Vol. 49 N° 20 (Octobre 2010)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 49 N° 20 (Octobre 2010) . - pp. 9764–9770 Titre : Long - term deactivation of supported Pt catalysts in the dehydrogenation of methylcyclohexane to toluene Type de document : texte imprimé Auteurs : Faisal Alhumaidan, Auteur ; David Cresswel, Auteur ; Arthur Garforth, Auteur Année de publication : 2011 Article en page(s) : pp. 9764–9770 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : kinetics Methylcyclohexane Résumé : The kinetics of methylcyclohexane (MCH) dehydrogenation over supported Pt catalysts was successfully described by a non-Langmuirian/noncompetitive Horiuti−Polanyi model (Ind. Eng. Chem. Res., in press). The daily reversible and irreversible deactivation, associated with activity tests, was satisfactorily included in the dehydrogenation model. The objective of this work is to incorporate the long-term deactivation of Pt catalysts, associated with life or deactivation tests, in the kinetic model. This has been successfully achieved by assuming that the long-term deactivation is the sum of two exponential decay processes, one rapid and completed in a few days, while the other is slow with a half-life of weeks to months. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie1013025 [article] Long - term deactivation of supported Pt catalysts in the dehydrogenation of methylcyclohexane to toluene [texte imprimé] / Faisal Alhumaidan, Auteur ; David Cresswel, Auteur ; Arthur Garforth, Auteur . - 2011 . - pp. 9764–9770. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 20 (Octobre 2010) . - pp. 9764–9770 Mots-clés : kinetics Methylcyclohexane Résumé : The kinetics of methylcyclohexane (MCH) dehydrogenation over supported Pt catalysts was successfully described by a non-Langmuirian/noncompetitive Horiuti−Polanyi model (Ind. Eng. Chem. Res., in press). The daily reversible and irreversible deactivation, associated with activity tests, was satisfactorily included in the dehydrogenation model. The objective of this work is to incorporate the long-term deactivation of Pt catalysts, associated with life or deactivation tests, in the kinetic model. This has been successfully achieved by assuming that the long-term deactivation is the sum of two exponential decay processes, one rapid and completed in a few days, while the other is slow with a half-life of weeks to months. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie1013025

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