Growth mechanism of coke on HBEA zeolite ...
Type de document :
Article dans une revue scientifique
URL permanente :
Titre :
Growth mechanism of coke on HBEA zeolite during ethanol transformation
Auteur(s) :
Pinard, L. [Auteur]
Hamieh, S. [Auteur]
Canaff, C. [Auteur]
Ferreira Madeira, F. [Auteur]
Batonneau-Gener, I. [Auteur]
Maury, S. [Auteur]
Delpoux, O. [Auteur]
Ben Tayeb Meziane, Karima [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516
Pouilloux, Y. [Auteur]
Vezin, Herve [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516
Hamieh, S. [Auteur]
Canaff, C. [Auteur]
Ferreira Madeira, F. [Auteur]
Batonneau-Gener, I. [Auteur]
Maury, S. [Auteur]
Delpoux, O. [Auteur]
Ben Tayeb Meziane, Karima [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516
Pouilloux, Y. [Auteur]
Vezin, Herve [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516
Titre de la revue :
Journal of Catalysis
Numéro :
33
Pagination :
284-297
Éditeur :
Elsevier BV
Date de publication :
2013-03
ISSN :
0021-9517
Mot(s)-clé(s) en anglais :
Coke characterization
(MA)LDI-TOF MS
EPR
Ethanol transformation
BEA zeolite
(MA)LDI-TOF MS
EPR
Ethanol transformation
BEA zeolite
Discipline(s) HAL :
Chimie/Catalyse
Chimie/Chimie organique
Chimie/Autre
Chimie/Chimie organique
Chimie/Autre
Résumé en anglais : [en]
HBEA (11) zeolite was deactivated rapidly by coking during the ethanol transformation into hydrocarbons, at 623 K and 30 bar. The nature of carbonaceous deposit was studied, after zeolite dissolution by hydrofluoric acid ...
Lire la suite >HBEA (11) zeolite was deactivated rapidly by coking during the ethanol transformation into hydrocarbons, at 623 K and 30 bar. The nature of carbonaceous deposit was studied, after zeolite dissolution by hydrofluoric acid both by gas chromatography coupled with mass spectrometry and by matrix-assisted laser desorption/ionization time of flight mass spectrometry (MALDI-TOF MS). The coke on the external zeolite surface was characterized directly on the spent catalyst by laser desorption/ionization time of flight mass spectrometry (LDI-TOF MS). The coke species were identified and classified into 17 families following their unsaturation number (4–23). The coke was polyaromatic, and it was very alkylated (methyl, ethyl, and propyl groups). It is compounded of alkylbenzenes, mainly hexamethylbenzene (HMB), and alkyl-pyrenes, located within the zeolite pore, which could migrate to the external zeolite surface and grow into polyaromatic compounds constituted up to eight aromatic rings and up to 40 carbon atoms. Pulsed electron paramagnetic resonance spectroscopy measurements and molecular simulation by using Cerius2 software have shown that HMBs are distant of 0.6 nm inside the zeolite pores.Lire moins >
Lire la suite >HBEA (11) zeolite was deactivated rapidly by coking during the ethanol transformation into hydrocarbons, at 623 K and 30 bar. The nature of carbonaceous deposit was studied, after zeolite dissolution by hydrofluoric acid both by gas chromatography coupled with mass spectrometry and by matrix-assisted laser desorption/ionization time of flight mass spectrometry (MALDI-TOF MS). The coke on the external zeolite surface was characterized directly on the spent catalyst by laser desorption/ionization time of flight mass spectrometry (LDI-TOF MS). The coke species were identified and classified into 17 families following their unsaturation number (4–23). The coke was polyaromatic, and it was very alkylated (methyl, ethyl, and propyl groups). It is compounded of alkylbenzenes, mainly hexamethylbenzene (HMB), and alkyl-pyrenes, located within the zeolite pore, which could migrate to the external zeolite surface and grow into polyaromatic compounds constituted up to eight aromatic rings and up to 40 carbon atoms. Pulsed electron paramagnetic resonance spectroscopy measurements and molecular simulation by using Cerius2 software have shown that HMBs are distant of 0.6 nm inside the zeolite pores.Lire moins >
Langue :
Anglais
Comité de lecture :
Oui
Audience :
Internationale
Vulgarisation :
Non
Établissement(s) :
Université de Lille
CNRS
CNRS
Collections :
Équipe(s) de recherche :
Propriétés magnéto structurales des matériaux (PMSM)
Date de dépôt :
2021-06-17T14:25:48Z
2021-10-06T14:27:55Z
2021-10-06T14:27:55Z