Effect of gadolinium on the catalytic properties of iron oxides for WGSR
- Autores
- Santos Silva, Caio Luis; Marchetti, Sergio Gustavo; da Costa Faro Júnior, Arnaldo; de Freitas Silva, Tatiana; Assaf, José Mansur; do Carmo Rangel, Maria
- Año de publicación
- 2013
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- Due to the need for energy supply through cleaner and more efficient technologies, the interest for the water gas shift reaction (WGSR) has increased especially due to its role in purifying hydrogen-rich streams. In order to find alternative catalysts for this reaction, the effect of gadolinium and its amount on the properties of iron oxide-based catalysts was studied in this work. Samples with different gadolinium to iron molar ratio (0.05; 0.1 and 0.15) were prepared by sol–gel method and characterized by chemical analysis, thermogravimetry, differential scanning calorimetry, infrared spectroscopy, X-ray diffraction, Mossbauer spectroscopy, specific surface area measurements and thermoprogrammed reduction. The catalysts were evaluated in WGSR at 1 atm in the range of 250–400 °C. Hematite and gadolinium ferrite were detected for all fresh catalysts based on iron and gadolinium while magnetite and iron carbides and gadolinium oxide were found for the spent ones. The specific surface area increased due to gadolinium, related to its role as spacer. Gadolinium made the reduction of Fe³⁺ and Fe²⁺ species more difficult for all catalysts and then inhibited the production of iron carbides during reaction, increasing the activity. The catalyst with Gd/Fe = 0.10 showed the highest activity that was assigned to its highest specific surface area, which exposed more active sites. No methane or ethane was found indicating that the iron carbides were inactive to Fischer–Tropsch synthesis under reaction conditions.
Centro de Investigación y Desarrollo en Ciencias Aplicadas - Materia
-
Química
Hydrogen
WGSR
Gadolinium ferrite
Hematite
MagnetiteIron carbide - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- http://creativecommons.org/licenses/by-nc-sa/4.0/
- Repositorio
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/127833
Ver los metadatos del registro completo
id |
SEDICI_55d2dbb0d6a2d94b065168f9248f40bc |
---|---|
oai_identifier_str |
oai:sedici.unlp.edu.ar:10915/127833 |
network_acronym_str |
SEDICI |
repository_id_str |
1329 |
network_name_str |
SEDICI (UNLP) |
spelling |
Effect of gadolinium on the catalytic properties of iron oxides for WGSRSantos Silva, Caio LuisMarchetti, Sergio Gustavoda Costa Faro Júnior, Arnaldode Freitas Silva, TatianaAssaf, José Mansurdo Carmo Rangel, MariaQuímicaHydrogenWGSRGadolinium ferriteHematiteMagnetiteIron carbideDue to the need for energy supply through cleaner and more efficient technologies, the interest for the water gas shift reaction (WGSR) has increased especially due to its role in purifying hydrogen-rich streams. In order to find alternative catalysts for this reaction, the effect of gadolinium and its amount on the properties of iron oxide-based catalysts was studied in this work. Samples with different gadolinium to iron molar ratio (0.05; 0.1 and 0.15) were prepared by sol–gel method and characterized by chemical analysis, thermogravimetry, differential scanning calorimetry, infrared spectroscopy, X-ray diffraction, Mossbauer spectroscopy, specific surface area measurements and thermoprogrammed reduction. The catalysts were evaluated in WGSR at 1 atm in the range of 250–400 °C. Hematite and gadolinium ferrite were detected for all fresh catalysts based on iron and gadolinium while magnetite and iron carbides and gadolinium oxide were found for the spent ones. The specific surface area increased due to gadolinium, related to its role as spacer. Gadolinium made the reduction of Fe³⁺ and Fe²⁺ species more difficult for all catalysts and then inhibited the production of iron carbides during reaction, increasing the activity. The catalyst with Gd/Fe = 0.10 showed the highest activity that was assigned to its highest specific surface area, which exposed more active sites. No methane or ethane was found indicating that the iron carbides were inactive to Fischer–Tropsch synthesis under reaction conditions.Centro de Investigación y Desarrollo en Ciencias Aplicadas2013info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf127-134http://sedici.unlp.edu.ar/handle/10915/127833enginfo:eu-repo/semantics/altIdentifier/issn/0920-5861info:eu-repo/semantics/altIdentifier/doi/10.1016/j.cattod.2013.02.025info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:31:07Zoai:sedici.unlp.edu.ar:10915/127833Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:31:07.843SEDICI (UNLP) - Universidad Nacional de La Platafalse |
dc.title.none.fl_str_mv |
Effect of gadolinium on the catalytic properties of iron oxides for WGSR |
title |
Effect of gadolinium on the catalytic properties of iron oxides for WGSR |
spellingShingle |
Effect of gadolinium on the catalytic properties of iron oxides for WGSR Santos Silva, Caio Luis Química Hydrogen WGSR Gadolinium ferrite Hematite MagnetiteIron carbide |
title_short |
Effect of gadolinium on the catalytic properties of iron oxides for WGSR |
title_full |
Effect of gadolinium on the catalytic properties of iron oxides for WGSR |
title_fullStr |
Effect of gadolinium on the catalytic properties of iron oxides for WGSR |
title_full_unstemmed |
Effect of gadolinium on the catalytic properties of iron oxides for WGSR |
title_sort |
Effect of gadolinium on the catalytic properties of iron oxides for WGSR |
dc.creator.none.fl_str_mv |
Santos Silva, Caio Luis Marchetti, Sergio Gustavo da Costa Faro Júnior, Arnaldo de Freitas Silva, Tatiana Assaf, José Mansur do Carmo Rangel, Maria |
author |
Santos Silva, Caio Luis |
author_facet |
Santos Silva, Caio Luis Marchetti, Sergio Gustavo da Costa Faro Júnior, Arnaldo de Freitas Silva, Tatiana Assaf, José Mansur do Carmo Rangel, Maria |
author_role |
author |
author2 |
Marchetti, Sergio Gustavo da Costa Faro Júnior, Arnaldo de Freitas Silva, Tatiana Assaf, José Mansur do Carmo Rangel, Maria |
author2_role |
author author author author author |
dc.subject.none.fl_str_mv |
Química Hydrogen WGSR Gadolinium ferrite Hematite MagnetiteIron carbide |
topic |
Química Hydrogen WGSR Gadolinium ferrite Hematite MagnetiteIron carbide |
dc.description.none.fl_txt_mv |
Due to the need for energy supply through cleaner and more efficient technologies, the interest for the water gas shift reaction (WGSR) has increased especially due to its role in purifying hydrogen-rich streams. In order to find alternative catalysts for this reaction, the effect of gadolinium and its amount on the properties of iron oxide-based catalysts was studied in this work. Samples with different gadolinium to iron molar ratio (0.05; 0.1 and 0.15) were prepared by sol–gel method and characterized by chemical analysis, thermogravimetry, differential scanning calorimetry, infrared spectroscopy, X-ray diffraction, Mossbauer spectroscopy, specific surface area measurements and thermoprogrammed reduction. The catalysts were evaluated in WGSR at 1 atm in the range of 250–400 °C. Hematite and gadolinium ferrite were detected for all fresh catalysts based on iron and gadolinium while magnetite and iron carbides and gadolinium oxide were found for the spent ones. The specific surface area increased due to gadolinium, related to its role as spacer. Gadolinium made the reduction of Fe³⁺ and Fe²⁺ species more difficult for all catalysts and then inhibited the production of iron carbides during reaction, increasing the activity. The catalyst with Gd/Fe = 0.10 showed the highest activity that was assigned to its highest specific surface area, which exposed more active sites. No methane or ethane was found indicating that the iron carbides were inactive to Fischer–Tropsch synthesis under reaction conditions. Centro de Investigación y Desarrollo en Ciencias Aplicadas |
description |
Due to the need for energy supply through cleaner and more efficient technologies, the interest for the water gas shift reaction (WGSR) has increased especially due to its role in purifying hydrogen-rich streams. In order to find alternative catalysts for this reaction, the effect of gadolinium and its amount on the properties of iron oxide-based catalysts was studied in this work. Samples with different gadolinium to iron molar ratio (0.05; 0.1 and 0.15) were prepared by sol–gel method and characterized by chemical analysis, thermogravimetry, differential scanning calorimetry, infrared spectroscopy, X-ray diffraction, Mossbauer spectroscopy, specific surface area measurements and thermoprogrammed reduction. The catalysts were evaluated in WGSR at 1 atm in the range of 250–400 °C. Hematite and gadolinium ferrite were detected for all fresh catalysts based on iron and gadolinium while magnetite and iron carbides and gadolinium oxide were found for the spent ones. The specific surface area increased due to gadolinium, related to its role as spacer. Gadolinium made the reduction of Fe³⁺ and Fe²⁺ species more difficult for all catalysts and then inhibited the production of iron carbides during reaction, increasing the activity. The catalyst with Gd/Fe = 0.10 showed the highest activity that was assigned to its highest specific surface area, which exposed more active sites. No methane or ethane was found indicating that the iron carbides were inactive to Fischer–Tropsch synthesis under reaction conditions. |
publishDate |
2013 |
dc.date.none.fl_str_mv |
2013 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Articulo http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
format |
article |
status_str |
publishedVersion |
dc.identifier.none.fl_str_mv |
http://sedici.unlp.edu.ar/handle/10915/127833 |
url |
http://sedici.unlp.edu.ar/handle/10915/127833 |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/issn/0920-5861 info:eu-repo/semantics/altIdentifier/doi/10.1016/j.cattod.2013.02.025 |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) |
eu_rights_str_mv |
openAccess |
rights_invalid_str_mv |
http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) |
dc.format.none.fl_str_mv |
application/pdf 127-134 |
dc.source.none.fl_str_mv |
reponame:SEDICI (UNLP) instname:Universidad Nacional de La Plata instacron:UNLP |
reponame_str |
SEDICI (UNLP) |
collection |
SEDICI (UNLP) |
instname_str |
Universidad Nacional de La Plata |
instacron_str |
UNLP |
institution |
UNLP |
repository.name.fl_str_mv |
SEDICI (UNLP) - Universidad Nacional de La Plata |
repository.mail.fl_str_mv |
alira@sedici.unlp.edu.ar |
_version_ |
1844616190928879616 |
score |
13.070432 |