Low-pressure oligomerization of diluted ethylene on a HZSM-5 zeolite catalyst

The oligomerization at low pressure of diluted ethylene coming from secondary streams is an attractive route for hydrocarbon production, by means of a low cost and energy efficient process. To evaluate the viability of this process, the effect of dilution with N2 or syngas on the low-pressure oligom...

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Autores: Tabernilla, Zuria, Ateka Bilbao, Ainara, Aguayo Urquijo, Andrés Tomás, Bilbao Elorriaga, Javier, Epelde Bejerano, Eva
Tipo de recurso: artículo
Fecha de publicación:2024
País:España
Institución:Universidad del País Vasco
Repositorio:Addi. Archivo Digital para la Docencia y la Investigación
OAI Identifier:oai:addi.ehu.eus:10810/70188
Acceso en línea:http://hdl.handle.net/10810/70188
Access Level:acceso abierto
Palabra clave:diluted ethylene
gasoline
oligomerization
HZSM-5 zeolite
coke deactivation
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spelling Low-pressure oligomerization of diluted ethylene on a HZSM-5 zeolite catalystTabernilla, ZuriaAteka Bilbao, AinaraAguayo Urquijo, Andrés TomásBilbao Elorriaga, JavierEpelde Bejerano, Evadiluted ethylenegasolineoligomerizationHZSM-5 zeolitecoke deactivationThe oligomerization at low pressure of diluted ethylene coming from secondary streams is an attractive route for hydrocarbon production, by means of a low cost and energy efficient process. To evaluate the viability of this process, the effect of dilution with N2 or syngas on the low-pressure oligomerization of ethylene (1.5 bar) was studied on a catalyst prepared with a HZSM-5 zeolite agglomerated in a mesoporous matrix of α- and γ-Al2O3, aiming to produce C5+ hydrocarbons (gasoline). The experiments were performed in a fixed bed reactor at 325 °C and a space time of 10.6 gcatalyst h molC−1. For an ethylene partial pressure of 0.33 bar, conversion surpassed 80 % and high C5+ hydrocarbon yield was obtained: >40 % with N2 as diluent; and, >30 % with syngas. The greater effect of syngas dilution on suppressing the formation of aromatics is explained by the role of H2 in decreasing the extent of dehydrocyclization reactions. The dilution of ethylene limits the extent of the reaction stages, but it also attenuates the stages for coke formation, by facilitating the diffusion of soft coke in the mesoporous matrix and contributing to decrease the deposition of hard coke in the zeolite micropores. Consequently, a pseudo-steady state of the catalyst is reached with a notable remnant activity for the formation of higher hydrocarbons.This work has been carried out with the financial support of the Ministry of Science, Innovation and Universities of the Spanish Government (PID2022-140584OB-I00); the Basque Government (Project IT1645-22); and the European Regional Development Funds (ERDF) and the European Commission (HORIZON H2020-MSCA RISE 2018. Contract No. 823745). Z. Tabernilla is grateful for the PhD grant from the Department of Education, University and Research of the Basque Government (PRE2023_2_0005).ElsevierEuropean Commission202420242024info:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10810/70188reponame:Addi. Archivo Digital para la Docencia y la Investigacióninstname:Universidad del País VascoInglésinfo:eu-repo/grantAgreement/EC/H2020/823745info:eu-repo/grantAgreement/MICINN/PID2022-140584OB-I00/https://www.sciencedirect.com/science/article/pii/S0959652624005195info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-nd/4.0/© 2024 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND licenseoai:addi.ehu.eus:10810/701882026-06-18T09:23:17Z
dc.title.none.fl_str_mv Low-pressure oligomerization of diluted ethylene on a HZSM-5 zeolite catalyst
title Low-pressure oligomerization of diluted ethylene on a HZSM-5 zeolite catalyst
spellingShingle Low-pressure oligomerization of diluted ethylene on a HZSM-5 zeolite catalyst
Tabernilla, Zuria
diluted ethylene
gasoline
oligomerization
HZSM-5 zeolite
coke deactivation
title_short Low-pressure oligomerization of diluted ethylene on a HZSM-5 zeolite catalyst
title_full Low-pressure oligomerization of diluted ethylene on a HZSM-5 zeolite catalyst
title_fullStr Low-pressure oligomerization of diluted ethylene on a HZSM-5 zeolite catalyst
title_full_unstemmed Low-pressure oligomerization of diluted ethylene on a HZSM-5 zeolite catalyst
title_sort Low-pressure oligomerization of diluted ethylene on a HZSM-5 zeolite catalyst
dc.creator.none.fl_str_mv Tabernilla, Zuria
Ateka Bilbao, Ainara
Aguayo Urquijo, Andrés Tomás
Bilbao Elorriaga, Javier
Epelde Bejerano, Eva
author Tabernilla, Zuria
author_facet Tabernilla, Zuria
Ateka Bilbao, Ainara
Aguayo Urquijo, Andrés Tomás
Bilbao Elorriaga, Javier
Epelde Bejerano, Eva
author_role author
author2 Ateka Bilbao, Ainara
Aguayo Urquijo, Andrés Tomás
Bilbao Elorriaga, Javier
Epelde Bejerano, Eva
author2_role author
author
author
author
dc.contributor.none.fl_str_mv European Commission
dc.subject.none.fl_str_mv diluted ethylene
gasoline
oligomerization
HZSM-5 zeolite
coke deactivation
topic diluted ethylene
gasoline
oligomerization
HZSM-5 zeolite
coke deactivation
description The oligomerization at low pressure of diluted ethylene coming from secondary streams is an attractive route for hydrocarbon production, by means of a low cost and energy efficient process. To evaluate the viability of this process, the effect of dilution with N2 or syngas on the low-pressure oligomerization of ethylene (1.5 bar) was studied on a catalyst prepared with a HZSM-5 zeolite agglomerated in a mesoporous matrix of α- and γ-Al2O3, aiming to produce C5+ hydrocarbons (gasoline). The experiments were performed in a fixed bed reactor at 325 °C and a space time of 10.6 gcatalyst h molC−1. For an ethylene partial pressure of 0.33 bar, conversion surpassed 80 % and high C5+ hydrocarbon yield was obtained: >40 % with N2 as diluent; and, >30 % with syngas. The greater effect of syngas dilution on suppressing the formation of aromatics is explained by the role of H2 in decreasing the extent of dehydrocyclization reactions. The dilution of ethylene limits the extent of the reaction stages, but it also attenuates the stages for coke formation, by facilitating the diffusion of soft coke in the mesoporous matrix and contributing to decrease the deposition of hard coke in the zeolite micropores. Consequently, a pseudo-steady state of the catalyst is reached with a notable remnant activity for the formation of higher hydrocarbons.
publishDate 2024
dc.date.none.fl_str_mv 2024
2024
2024
dc.type.none.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10810/70188
url http://hdl.handle.net/10810/70188
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv info:eu-repo/grantAgreement/EC/H2020/823745
info:eu-repo/grantAgreement/MICINN/PID2022-140584OB-I00/
https://www.sciencedirect.com/science/article/pii/S0959652624005195
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-nd/4.0/
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:Addi. Archivo Digital para la Docencia y la Investigación
instname:Universidad del País Vasco
instname_str Universidad del País Vasco
reponame_str Addi. Archivo Digital para la Docencia y la Investigación
collection Addi. Archivo Digital para la Docencia y la Investigación
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,811543

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