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

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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.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
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dc.rights.license.spa.fl_str_mv	Atribución-NoComercial 4.0 Internacional
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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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Adsorption and catalytic oxidation of asphaltenes in fumed silica nanoparticles: Effect of the surface acidity

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