Regeneration of NiAl2O4 spinel type catalysts used in the reforming of raw bio-oil

The regenerability of Ni catalysts in reforming reactions is a key factor for process viability. Accordingly, this study addresses the regeneration of two spinel NiAl2O4 type catalysts by reaction-regeneration cycles in the oxidative steam reforming (OSR) of raw bio-oil. The spinel type catalysts we...

ver descrição completa

Detalhes bibliográficos
Autores: Remiro Eguskiza, Aingeru, Arandia Gutiérrez, Aitor, Oar Arteta, Lide, Bilbao Elorriaga, Javier, Gayubo Cazorla, Ana Guadalupe
Formato: artículo
Fecha de publicación:2018
País:España
Recursos:Universidad del País Vasco
Repositorio:Addi. Archivo Digital para la Docencia y la Investigación
OAI Identifier:oai:addi.ehu.eus:10810/64823
Acesso em linha:http://hdl.handle.net/10810/64823
Access Level:acceso abierto
Palavra-chave:regeneration
Ni-Al spinel
reforming
bio-oil
hydrogen production
id ES_ef3d043105b1da94764b1b41ed2f3eeb
oai_identifier_str oai:addi.ehu.eus:10810/64823
network_acronym_str ES
network_name_str España
repository_id_str
spelling Regeneration of NiAl2O4 spinel type catalysts used in the reforming of raw bio-oilRemiro Eguskiza, AingeruArandia Gutiérrez, AitorOar Arteta, LideBilbao Elorriaga, JavierGayubo Cazorla, Ana GuadaluperegenerationNi-Al spinelreformingbio-oilhydrogen productionThe regenerability of Ni catalysts in reforming reactions is a key factor for process viability. Accordingly, this study addresses the regeneration of two spinel NiAl2O4 type catalysts by reaction-regeneration cycles in the oxidative steam reforming (OSR) of raw bio-oil. The spinel type catalysts were prepared by different methods including a supported Ni/La2O3-αAl2O3 catalyst and a bulk NiAl2O4 catalyst. The experimental set-up consists of two units connected in series for i) the thermal treatment of bio-oil at 500 ºC, in order to control the deposition of pyrolytic lignin, followed by; ii) the oxidative steam reforming (OSR) of the remaining oxygenates in a fluidized bed catalytic reactor. The conditions in the OSR reaction step were: 700 ºC; oxygen/steam/carbon ratio (O/S/C), 0.34/6/1; space time, 0.75 gcatalysth/gbio-oil (for supported catalyst) and 0.15 gcatalysth/gbio-oil (for bulk catalyst). Three different strategies have been studied in the regeneration step by coke combustion, including the in situ regeneration inside the reactor at 650 ºC and 850 ºC, and the ex situ regeneration in an external oven at 850 ºC, for 4 h in all the cases. The behavior of the fresh and regenerated catalysts has been explained according to their metallic properties, determined by different characterization techniques (temperature programmed reduction (TPR), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and transmission electronic microscopy (TEM)). According to these results, the combustion ex situ of the catalyst at 850 °C is able to completely regenerate the bulk catalyst, since these regeneration conditions lead to the total recovery of the NiAl2O4 spinel phase together with negligible loss of Ni on the surface in the catalyst. These novel results are crucial for future industrial implementation of the processThis work was carried out with the financial support of the Department of Education Universities and Investigation of the Basque Government (IT748-13), the Ministry of Economy and Competitiveness of the Spanish Government jointly with the European Regional Development Funds (AEI/FEDER, UE) (Proyects CTQ2012-35263 and CTQ2015-68883-R and Ph.D. grant BES-2013-063639 for A. Arandia).Elsevier202420242018info:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10810/64823reponame:Addi. Archivo Digital para la Docencia y la Investigacióninstname:Universidad del País VascoInglésinfo:eu-repo/grantAgreement/MINECO/CTQ2012-35263/info:eu-repo/grantAgreement/MINECO/CTQ2015-68883-R/info:eu-repo/grantAgreement/MINECO/BES-2013-063639/https://www.sciencedirect.com/science/article/pii/S0926337318305319info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-nd/3.0/es/© 2018. This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/oai:addi.ehu.eus:10810/648232026-06-18T09:23:17Z
dc.title.none.fl_str_mv Regeneration of NiAl2O4 spinel type catalysts used in the reforming of raw bio-oil
title Regeneration of NiAl2O4 spinel type catalysts used in the reforming of raw bio-oil
spellingShingle Regeneration of NiAl2O4 spinel type catalysts used in the reforming of raw bio-oil
Remiro Eguskiza, Aingeru
regeneration
Ni-Al spinel
reforming
bio-oil
hydrogen production
title_short Regeneration of NiAl2O4 spinel type catalysts used in the reforming of raw bio-oil
title_full Regeneration of NiAl2O4 spinel type catalysts used in the reforming of raw bio-oil
title_fullStr Regeneration of NiAl2O4 spinel type catalysts used in the reforming of raw bio-oil
title_full_unstemmed Regeneration of NiAl2O4 spinel type catalysts used in the reforming of raw bio-oil
title_sort Regeneration of NiAl2O4 spinel type catalysts used in the reforming of raw bio-oil
dc.creator.none.fl_str_mv Remiro Eguskiza, Aingeru
Arandia Gutiérrez, Aitor
Oar Arteta, Lide
Bilbao Elorriaga, Javier
Gayubo Cazorla, Ana Guadalupe
author Remiro Eguskiza, Aingeru
author_facet Remiro Eguskiza, Aingeru
Arandia Gutiérrez, Aitor
Oar Arteta, Lide
Bilbao Elorriaga, Javier
Gayubo Cazorla, Ana Guadalupe
author_role author
author2 Arandia Gutiérrez, Aitor
Oar Arteta, Lide
Bilbao Elorriaga, Javier
Gayubo Cazorla, Ana Guadalupe
author2_role author
author
author
author
dc.subject.none.fl_str_mv regeneration
Ni-Al spinel
reforming
bio-oil
hydrogen production
topic regeneration
Ni-Al spinel
reforming
bio-oil
hydrogen production
description The regenerability of Ni catalysts in reforming reactions is a key factor for process viability. Accordingly, this study addresses the regeneration of two spinel NiAl2O4 type catalysts by reaction-regeneration cycles in the oxidative steam reforming (OSR) of raw bio-oil. The spinel type catalysts were prepared by different methods including a supported Ni/La2O3-αAl2O3 catalyst and a bulk NiAl2O4 catalyst. The experimental set-up consists of two units connected in series for i) the thermal treatment of bio-oil at 500 ºC, in order to control the deposition of pyrolytic lignin, followed by; ii) the oxidative steam reforming (OSR) of the remaining oxygenates in a fluidized bed catalytic reactor. The conditions in the OSR reaction step were: 700 ºC; oxygen/steam/carbon ratio (O/S/C), 0.34/6/1; space time, 0.75 gcatalysth/gbio-oil (for supported catalyst) and 0.15 gcatalysth/gbio-oil (for bulk catalyst). Three different strategies have been studied in the regeneration step by coke combustion, including the in situ regeneration inside the reactor at 650 ºC and 850 ºC, and the ex situ regeneration in an external oven at 850 ºC, for 4 h in all the cases. The behavior of the fresh and regenerated catalysts has been explained according to their metallic properties, determined by different characterization techniques (temperature programmed reduction (TPR), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and transmission electronic microscopy (TEM)). According to these results, the combustion ex situ of the catalyst at 850 °C is able to completely regenerate the bulk catalyst, since these regeneration conditions lead to the total recovery of the NiAl2O4 spinel phase together with negligible loss of Ni on the surface in the catalyst. These novel results are crucial for future industrial implementation of the process
publishDate 2018
dc.date.none.fl_str_mv 2018
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/10810/64823
url http://hdl.handle.net/10810/64823
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv info:eu-repo/grantAgreement/MINECO/CTQ2012-35263/
info:eu-repo/grantAgreement/MINECO/CTQ2015-68883-R/
info:eu-repo/grantAgreement/MINECO/BES-2013-063639/
https://www.sciencedirect.com/science/article/pii/S0926337318305319
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-nd/3.0/es/
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
_version_ 1869423844546052096
score 15,228081

Registos relacionados