On the involvement of radical “coke” in ...
Type de document :
Article dans une revue scientifique
URL permanente :
Titre :
On the involvement of radical “coke” in ethanol conversion to hydrocarbons over HZSM-5 zeolite
Auteur(s) :
Pinard, L. [Auteur]
Ben Tayeb Meziane, Karima [Auteur]
1292|||Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement - UMR 8516 [LASIRE]
Hamieh, S. [Auteur]
Vezin, Herve [Auteur]
1292|||Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement - UMR 8516 [LASIRE]
Canaff, C. [Auteur]
Maury, S. [Auteur]
Delpoux, O. [Auteur]
Pouilloux, Y. [Auteur]
Ben Tayeb Meziane, Karima [Auteur]
1292|||Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement - UMR 8516 [LASIRE]
Hamieh, S. [Auteur]
Vezin, Herve [Auteur]
1292|||Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement - UMR 8516 [LASIRE]
Canaff, C. [Auteur]
Maury, S. [Auteur]
Delpoux, O. [Auteur]
Pouilloux, Y. [Auteur]
Titre de la revue :
Catalysis Today
Nom court de la revue :
Catalysis Today
Numéro :
218-219
Pagination :
57-64
Éditeur :
Elsevier BV
Date de publication :
2013-12
ISSN :
0920-5861
Mot(s)-clé(s) en anglais :
EPR
“Coke” composition
“Coke” location
Radical inhibitor
“Coke” composition
“Coke” location
Radical inhibitor
Discipline(s) HAL :
Chimie/Chimie théorique et/ou physique
Résumé en anglais : [en]
During ethanol-to-hydrocarbons (ETH) process at 623 K and 30 bar on HZSM-5(40), side reactions occur leading to the formation of carbonaceous materials, defined as "coke" which is composed mainly of alkylbenzenes and ...
Lire la suite >During ethanol-to-hydrocarbons (ETH) process at 623 K and 30 bar on HZSM-5(40), side reactions occur leading to the formation of carbonaceous materials, defined as "coke" which is composed mainly of alkylbenzenes and alkylnaphthalenes. The "coke" molecules, trapped inside the channels have first a direct effect on the Brønsted acid sites by poisoning them; however, they can also have an indirect effect. Indeed, some "coke" molecules lead to radicals formation by spontaneous ionization which could potentially act as active species in ethene oligomerization. Nevertheless, the radicals could also condensate into bulkier molecules leading to inactive species and consequently undergoing to catalyst deactivation. The participation of radical "coke" in EtOH transformation into higher hydrocarbons was demonstrated by adding in the feed gas a radical inhibitor such as hydroquinone (HQ). Indeed, the consumption of radical species by HQ, enhanced the catalyst deactivation.Lire moins >
Lire la suite >During ethanol-to-hydrocarbons (ETH) process at 623 K and 30 bar on HZSM-5(40), side reactions occur leading to the formation of carbonaceous materials, defined as "coke" which is composed mainly of alkylbenzenes and alkylnaphthalenes. The "coke" molecules, trapped inside the channels have first a direct effect on the Brønsted acid sites by poisoning them; however, they can also have an indirect effect. Indeed, some "coke" molecules lead to radicals formation by spontaneous ionization which could potentially act as active species in ethene oligomerization. Nevertheless, the radicals could also condensate into bulkier molecules leading to inactive species and consequently undergoing to catalyst deactivation. The participation of radical "coke" in EtOH transformation into higher hydrocarbons was demonstrated by adding in the feed gas a radical inhibitor such as hydroquinone (HQ). Indeed, the consumption of radical species by HQ, enhanced the catalyst deactivation.Lire moins >
Langue :
Anglais
Audience :
Internationale
Vulgarisation :
Non
Établissement(s) :
Université de Lille
CNRS
CNRS
Collections :
Date de dépôt :
2021-06-17T14:38:40Z
2021-10-04T13:13:04Z
2021-10-04T13:53:33Z
2021-10-04T13:13:04Z
2021-10-04T13:53:33Z