Mechanistic insights on the ethanol ...
Document type :
Article dans une revue scientifique: Article original
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Title :
Mechanistic insights on the ethanol transformation into hydrocarbons over HZSM-5 zeolite
Author(s) :
Madeira Ferreira, F. [Auteur]
Institut Français du Pétrole
Laboratoire de catalyse en chimie organique [LACCO]
Gnep, N.S. [Auteur]
Laboratoire de catalyse en chimie organique [LACCO]
Magnoux, P. [Auteur]
Laboratoire de catalyse en chimie organique [LACCO]
Vezin, Herve [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516
Maury, S. [Auteur]
Institut Français du Pétrole
Cadran, N. [Auteur]
Institut Français du Pétrole
Institut Français du Pétrole
Laboratoire de catalyse en chimie organique [LACCO]
Gnep, N.S. [Auteur]
Laboratoire de catalyse en chimie organique [LACCO]
Magnoux, P. [Auteur]
Laboratoire de catalyse en chimie organique [LACCO]
Vezin, Herve [Auteur]

Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516
Maury, S. [Auteur]
Institut Français du Pétrole
Cadran, N. [Auteur]
Institut Français du Pétrole
Journal title :
Chemical Engineering Journal
Abbreviated title :
Chemical Engineering Journal
Volume number :
161
Pages :
403-408
Publisher :
Elsevier BV
Publication date :
2010-07-15
Article status :
Publié
ISSN :
1385-8947
English keyword(s) :
Ethanol transformation
HZSM-5 zeolites
Radicals
EPR
HZSM-5 zeolites
Radicals
EPR
HAL domain(s) :
Chimie/Chimie théorique et/ou physique
English abstract : [en]
HZSM-5 zeolite was found to be a very stable catalyst for the ethanol transformation into hydrocarbons at 350 °C and 30 bar total pressure. It was found to maintain high activity for C3+ hydrocarbons formation with ...
Show more >HZSM-5 zeolite was found to be a very stable catalyst for the ethanol transformation into hydrocarbons at 350 °C and 30 bar total pressure. It was found to maintain high activity for C3+ hydrocarbons formation with time-on-stream in spite of a near total loss of Brønsted acidity, 92% loss of microporosity and high coke content deposited inside its micropore volume. The same solid, passivated with TEOS was tested in the same conditions and it was found that the treatment slightly improved the catalytic performance of the zeolite, even if similar losses of acidity and microporisty were determined after reaction. This shows that C3+ hydrocarbons’ formation does not occur at the external surface. Alkyl aromatic hydrocarbons were found occluded in the zeolite structure after reaction, detected by IR spectroscopy analysis and by CH2Cl2 extraction after solubilization of the structure with HF solution. EPR-CW analysis of both coked samples proved existence of free radicals. This last technique could provide us further enlightening of the ethanol transformation mechanism.Show less >
Show more >HZSM-5 zeolite was found to be a very stable catalyst for the ethanol transformation into hydrocarbons at 350 °C and 30 bar total pressure. It was found to maintain high activity for C3+ hydrocarbons formation with time-on-stream in spite of a near total loss of Brønsted acidity, 92% loss of microporosity and high coke content deposited inside its micropore volume. The same solid, passivated with TEOS was tested in the same conditions and it was found that the treatment slightly improved the catalytic performance of the zeolite, even if similar losses of acidity and microporisty were determined after reaction. This shows that C3+ hydrocarbons’ formation does not occur at the external surface. Alkyl aromatic hydrocarbons were found occluded in the zeolite structure after reaction, detected by IR spectroscopy analysis and by CH2Cl2 extraction after solubilization of the structure with HF solution. EPR-CW analysis of both coked samples proved existence of free radicals. This last technique could provide us further enlightening of the ethanol transformation mechanism.Show less >
Language :
Anglais
Audience :
Internationale
Popular science :
Non
Administrative institution(s) :
Université de Lille
CNRS
CNRS
Collections :
Submission date :
2021-06-18T08:30:38Z
2021-10-08T12:31:11Z
2021-10-08T12:31:11Z