Adsorption and catalytic oxidation of asphaltenes in fumed silica nanoparticles: Effect of the surface acidity

This study aims to evaluate the effect of surface acidity of fumed silica nanoparticles in adsorption and subsequent thermal cracking of Colombian asphaltenes. The acidities of the surfaces were established through Temperature Programed Desorption (TPD) experiments. The adsorption equilibrium of asp...

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Autores:
Franco-Ariza, Camilo Andrés
Guzmán-Calle, Juan David
Cortés, Farid B.
Tipo de recurso:
Article of journal
Fecha de publicación:
2016
Institución:
Universidad Nacional de Colombia
Repositorio:
Universidad Nacional de Colombia
Idioma:
spa
OAI Identifier:
oai:repositorio.unal.edu.co:unal/60517
Acceso en línea:
https://repositorio.unal.edu.co/handle/unal/60517
http://bdigital.unal.edu.co/58849/
Palabra clave:
62 Ingeniería y operaciones afines / Engineering
asphaltenes
adsorption isotherms
thermal cracking
nanoparticles
superficial modification
asfaltenos
isotermas de adsorción
craqueo térmico
nanopartículas
modificación superficial
Rights
openAccess
License
Atribución-NoComercial 4.0 Internacional
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oai_identifier_str oai:repositorio.unal.edu.co:unal/60517
network_acronym_str UNACIONAL2
network_name_str Universidad Nacional de Colombia
repository_id_str
spelling Atribución-NoComercial 4.0 InternacionalDerechos reservados - Universidad Nacional de Colombiahttp://creativecommons.org/licenses/by-nc/4.0/info:eu-repo/semantics/openAccesshttp://purl.org/coar/access_right/c_abf2Franco-Ariza, Camilo Andrés06b76659-6016-4c22-9afb-69fa33493759300Guzmán-Calle, Juan Davida2215ba8-c677-4bf0-847f-b5cc6fb8134f300Cortés, Farid B.0cf15909-abf8-4914-9f20-a6bb83122ad13002019-07-02T18:30:08Z2019-07-02T18:30:08Z2016-07-01ISSN: 2346-2183https://repositorio.unal.edu.co/handle/unal/60517http://bdigital.unal.edu.co/58849/This study aims to evaluate the effect of surface acidity of fumed silica nanoparticles in adsorption and subsequent thermal cracking of Colombian asphaltenes. The acidities of the surfaces were established through Temperature Programed Desorption (TPD) experiments. The adsorption equilibrium of asphaltenes was determined using a static batch method, and the data obtained was fitted using the Langmuir model, the Freundlich model and the SLE Model. Asphaltenes catalytic oxidation experiments were conducted, and it was found that this process was surface nature dependent. In all cases, the temperature of asphaltenes oxidation was reduced regarding the virgin asphaltene sample. The effective activation energies were estimated with the iso-conversional OFW method. This energy was found to be related to adsorption affinity and asphaltenes self-association on nanoparticles surface.Este trabajo busca evaluar el efecto de la acides superficial de nanopartículas de sílice fumárica en la adsorción y craqueo térmico de asfaltenos colombianos. La acidez de las superficies fue determinada a través de pruebas TPD. Los experimentos de adsorción fueron elaborados utilizando un método por lotes y los datos obtenidos fueron ajustados al modelo de Langmuir, al modelo de Freundlich y al modelo SLE. Se llevó a cabo la oxidación catalítica de los asfaltenos y se encontró que este proceso era dependiente de la superficie en que se llevaba a cabo. En todos los casos, la temperatura de oxidación de los asfaltenos fue reducida en consideración con los asfaltenos vírgenes. Las energías de activación fueron estimadas con el método isoconversional OFW. Se encontró que esta energía está relacionada con la afinidad del proceso adsortivo y la auto-asociación de los asfaltenos en la superficie de la nanopartículaapplication/pdfspaUniversidad Nacional de Colombia (Sede Medellín). Facultad de Minas.https://revistas.unal.edu.co/index.php/dyna/article/view/56106Universidad Nacional de Colombia Revistas electrónicas UN DynaDynaFranco-Ariza, Camilo Andrés and Guzmán-Calle, Juan David and Cortés, Farid B. (2016) Adsorption and catalytic oxidation of asphaltenes in fumed silica nanoparticles: Effect of the surface acidity. DYNA, 83 (198). pp. 171-179. ISSN 2346-218362 Ingeniería y operaciones afines / Engineeringasphaltenesadsorption isothermsthermal crackingnanoparticlessuperficial modificationasfaltenosisotermas de adsorcióncraqueo térmiconanopartículasmodificación superficialAdsorption and catalytic oxidation of asphaltenes in fumed silica nanoparticles: Effect of the surface acidityArtículo de revistainfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501http://purl.org/coar/resource_type/c_2df8fbb1http://purl.org/coar/version/c_970fb48d4fbd8a85Texthttp://purl.org/redcol/resource_type/ARTORIGINAL56106-306114-3-PB.pdfapplication/pdf541484https://repositorio.unal.edu.co/bitstream/unal/60517/1/56106-306114-3-PB.pdff8e7d3eaae8b432686425252e11d52baMD51THUMBNAIL56106-306114-3-PB.pdf.jpg56106-306114-3-PB.pdf.jpgGenerated Thumbnailimage/jpeg10064https://repositorio.unal.edu.co/bitstream/unal/60517/2/56106-306114-3-PB.pdf.jpgc1bed93487db39bfce688a291e3aa434MD52unal/60517oai:repositorio.unal.edu.co:unal/605172023-04-07 23:04:38.07Repositorio Institucional Universidad Nacional de Colombiarepositorio_nal@unal.edu.co
dc.title.spa.fl_str_mv Adsorption and catalytic oxidation of asphaltenes in fumed silica nanoparticles: Effect of the surface acidity
title Adsorption and catalytic oxidation of asphaltenes in fumed silica nanoparticles: Effect of the surface acidity
spellingShingle Adsorption and catalytic oxidation of asphaltenes in fumed silica nanoparticles: Effect of the surface acidity
62 Ingeniería y operaciones afines / Engineering
asphaltenes
adsorption isotherms
thermal cracking
nanoparticles
superficial modification
asfaltenos
isotermas de adsorción
craqueo térmico
nanopartículas
modificación superficial
title_short Adsorption and catalytic oxidation of asphaltenes in fumed silica nanoparticles: Effect of the surface acidity
title_full Adsorption and catalytic oxidation of asphaltenes in fumed silica nanoparticles: Effect of the surface acidity
title_fullStr Adsorption and catalytic oxidation of asphaltenes in fumed silica nanoparticles: Effect of the surface acidity
title_full_unstemmed Adsorption and catalytic oxidation of asphaltenes in fumed silica nanoparticles: Effect of the surface acidity
title_sort Adsorption and catalytic oxidation of asphaltenes in fumed silica nanoparticles: Effect of the surface acidity
dc.creator.fl_str_mv Franco-Ariza, Camilo Andrés
Guzmán-Calle, Juan David
Cortés, Farid B.
dc.contributor.author.spa.fl_str_mv Franco-Ariza, Camilo Andrés
Guzmán-Calle, Juan David
Cortés, Farid B.
dc.subject.ddc.spa.fl_str_mv 62 Ingeniería y operaciones afines / Engineering
topic 62 Ingeniería y operaciones afines / Engineering
asphaltenes
adsorption isotherms
thermal cracking
nanoparticles
superficial modification
asfaltenos
isotermas de adsorción
craqueo térmico
nanopartículas
modificación superficial
dc.subject.proposal.spa.fl_str_mv asphaltenes
adsorption isotherms
thermal cracking
nanoparticles
superficial modification
asfaltenos
isotermas de adsorción
craqueo térmico
nanopartículas
modificación superficial
description This study aims to evaluate the effect of surface acidity of fumed silica nanoparticles in adsorption and subsequent thermal cracking of Colombian asphaltenes. The acidities of the surfaces were established through Temperature Programed Desorption (TPD) experiments. The adsorption equilibrium of asphaltenes was determined using a static batch method, and the data obtained was fitted using the Langmuir model, the Freundlich model and the SLE Model. Asphaltenes catalytic oxidation experiments were conducted, and it was found that this process was surface nature dependent. In all cases, the temperature of asphaltenes oxidation was reduced regarding the virgin asphaltene sample. The effective activation energies were estimated with the iso-conversional OFW method. This energy was found to be related to adsorption affinity and asphaltenes self-association on nanoparticles surface.
publishDate 2016
dc.date.issued.spa.fl_str_mv 2016-07-01
dc.date.accessioned.spa.fl_str_mv 2019-07-02T18:30:08Z
dc.date.available.spa.fl_str_mv 2019-07-02T18:30:08Z
dc.type.spa.fl_str_mv Artículo de revista
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dc.type.coarversion.spa.fl_str_mv http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.content.spa.fl_str_mv Text
dc.type.redcol.spa.fl_str_mv http://purl.org/redcol/resource_type/ART
format http://purl.org/coar/resource_type/c_6501
status_str publishedVersion
dc.identifier.issn.spa.fl_str_mv ISSN: 2346-2183
dc.identifier.uri.none.fl_str_mv https://repositorio.unal.edu.co/handle/unal/60517
dc.identifier.eprints.spa.fl_str_mv http://bdigital.unal.edu.co/58849/
identifier_str_mv ISSN: 2346-2183
url https://repositorio.unal.edu.co/handle/unal/60517
http://bdigital.unal.edu.co/58849/
dc.language.iso.spa.fl_str_mv spa
language spa
dc.relation.spa.fl_str_mv https://revistas.unal.edu.co/index.php/dyna/article/view/56106
dc.relation.ispartof.spa.fl_str_mv Universidad Nacional de Colombia Revistas electrónicas UN Dyna
Dyna
dc.relation.references.spa.fl_str_mv Franco-Ariza, Camilo Andrés and Guzmán-Calle, Juan David and Cortés, Farid B. (2016) Adsorption and catalytic oxidation of asphaltenes in fumed silica nanoparticles: Effect of the surface acidity. DYNA, 83 (198). pp. 171-179. ISSN 2346-2183
dc.rights.spa.fl_str_mv Derechos reservados - Universidad Nacional de Colombia
dc.rights.coar.fl_str_mv http://purl.org/coar/access_right/c_abf2
dc.rights.license.spa.fl_str_mv Atribución-NoComercial 4.0 Internacional
dc.rights.uri.spa.fl_str_mv http://creativecommons.org/licenses/by-nc/4.0/
dc.rights.accessrights.spa.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv Atribución-NoComercial 4.0 Internacional
Derechos reservados - Universidad Nacional de Colombia
http://creativecommons.org/licenses/by-nc/4.0/
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.mimetype.spa.fl_str_mv application/pdf
dc.publisher.spa.fl_str_mv Universidad Nacional de Colombia (Sede Medellín). Facultad de Minas.
institution Universidad Nacional de Colombia
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