Elucidation of the Average Molecular Structure of Argentinian Asphaltenes

Autores
Bava, Yanina Belén; Geronés, Mariana; Buceta, David; Iglesia Rodríguez, Darío de la; López Quintela, M. Arturo; Erben, Mauricio Federico
Año de publicación
2019
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Petroleum asphaltenes were separated from three different Argentinian crude oils. The asphaltene fractions were extracted by precipitation employing n-pentane and n-heptane solvents, and the coprecipitated resins were removed via Soxhlet extraction. The asphaltenes were characterized by elemental analysis, thermogravimetric analysis, laser desorption ionization mass spectrometry, Fourier-transform infrared spectroscopy, proton nuclear magnetic resonance, powder X-ray diffraction, and Raman spectroscopy. It was found that the asphaltene fractions present both a higher content of heteroatoms and a major degree of aromaticity, when n-heptane is employed. Average structural parameters were obtained by a comprehensive analysis of the experimental data, including those describing the central polycyclic aromatic hydrocarbon (PAH) cores and lateral chains. Thus, a hypothetical average molecular structure is proposed for the Argentinian asphaltenes. The average model molecules have a nucleus of PAHs arranged as pericondensed systems of 4−6 fused aromatic rings, with naphthenic groups and/or alkyl chains of 5−10 carbon long attached.
Facultad de Ciencias Exactas
Centro de Química Inorgánica
Materia
Ciencias Exactas
Química
Hydrocarbons
Aromatic compounds
Solvents
Petrochemicals
Nuclear magnetic resonance spectroscopy
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/132868
Acceder
id SEDICI_e529ec63c85bf6ee557fcf7f36910916
oai_identifier_str oai:sedici.unlp.edu.ar:10915/132868
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling Elucidation of the Average Molecular Structure of Argentinian AsphaltenesBava, Yanina BelénGeronés, MarianaBuceta, DavidIglesia Rodríguez, Darío de laLópez Quintela, M. ArturoErben, Mauricio FedericoCiencias ExactasQuímicaHydrocarbonsAromatic compoundsSolventsPetrochemicalsNuclear magnetic resonance spectroscopyPetroleum asphaltenes were separated from three different Argentinian crude oils. The asphaltene fractions were extracted by precipitation employing n-pentane and n-heptane solvents, and the coprecipitated resins were removed via Soxhlet extraction. The asphaltenes were characterized by elemental analysis, thermogravimetric analysis, laser desorption ionization mass spectrometry, Fourier-transform infrared spectroscopy, proton nuclear magnetic resonance, powder X-ray diffraction, and Raman spectroscopy. It was found that the asphaltene fractions present both a higher content of heteroatoms and a major degree of aromaticity, when n-heptane is employed. Average structural parameters were obtained by a comprehensive analysis of the experimental data, including those describing the central polycyclic aromatic hydrocarbon (PAH) cores and lateral chains. Thus, a hypothetical average molecular structure is proposed for the Argentinian asphaltenes. The average model molecules have a nucleus of PAHs arranged as pericondensed systems of 4−6 fused aromatic rings, with naphthenic groups and/or alkyl chains of 5−10 carbon long attached.Facultad de Ciencias ExactasCentro de Química Inorgánica2019-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf2950-2960http://sedici.unlp.edu.ar/handle/10915/132868enginfo:eu-repo/semantics/altIdentifier/issn/0887-0624info:eu-repo/semantics/altIdentifier/issn/1520-5029info:eu-repo/semantics/altIdentifier/doi/10.1021/acs.energyfuels.8b04318info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/4.0/Creative Commons Attribution 4.0 International (CC BY 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-10-22T17:13:16Zoai:sedici.unlp.edu.ar:10915/132868Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-10-22 17:13:16.329SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Elucidation of the Average Molecular Structure of Argentinian Asphaltenes
title Elucidation of the Average Molecular Structure of Argentinian Asphaltenes
spellingShingle Elucidation of the Average Molecular Structure of Argentinian Asphaltenes
Bava, Yanina Belén
Ciencias Exactas
Química
Hydrocarbons
Aromatic compounds
Solvents
Petrochemicals
Nuclear magnetic resonance spectroscopy
title_short Elucidation of the Average Molecular Structure of Argentinian Asphaltenes
title_full Elucidation of the Average Molecular Structure of Argentinian Asphaltenes
title_fullStr Elucidation of the Average Molecular Structure of Argentinian Asphaltenes
title_full_unstemmed Elucidation of the Average Molecular Structure of Argentinian Asphaltenes
title_sort Elucidation of the Average Molecular Structure of Argentinian Asphaltenes
dc.creator.none.fl_str_mv Bava, Yanina Belén
Geronés, Mariana
Buceta, David
Iglesia Rodríguez, Darío de la
López Quintela, M. Arturo
Erben, Mauricio Federico
author Bava, Yanina Belén
author_facet Bava, Yanina Belén
Geronés, Mariana
Buceta, David
Iglesia Rodríguez, Darío de la
López Quintela, M. Arturo
Erben, Mauricio Federico
author_role author
author2 Geronés, Mariana
Buceta, David
Iglesia Rodríguez, Darío de la
López Quintela, M. Arturo
Erben, Mauricio Federico
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Ciencias Exactas
Química
Hydrocarbons
Aromatic compounds
Solvents
Petrochemicals
Nuclear magnetic resonance spectroscopy
topic Ciencias Exactas
Química
Hydrocarbons
Aromatic compounds
Solvents
Petrochemicals
Nuclear magnetic resonance spectroscopy
dc.description.none.fl_txt_mv Petroleum asphaltenes were separated from three different Argentinian crude oils. The asphaltene fractions were extracted by precipitation employing n-pentane and n-heptane solvents, and the coprecipitated resins were removed via Soxhlet extraction. The asphaltenes were characterized by elemental analysis, thermogravimetric analysis, laser desorption ionization mass spectrometry, Fourier-transform infrared spectroscopy, proton nuclear magnetic resonance, powder X-ray diffraction, and Raman spectroscopy. It was found that the asphaltene fractions present both a higher content of heteroatoms and a major degree of aromaticity, when n-heptane is employed. Average structural parameters were obtained by a comprehensive analysis of the experimental data, including those describing the central polycyclic aromatic hydrocarbon (PAH) cores and lateral chains. Thus, a hypothetical average molecular structure is proposed for the Argentinian asphaltenes. The average model molecules have a nucleus of PAHs arranged as pericondensed systems of 4−6 fused aromatic rings, with naphthenic groups and/or alkyl chains of 5−10 carbon long attached.
Facultad de Ciencias Exactas
Centro de Química Inorgánica
description Petroleum asphaltenes were separated from three different Argentinian crude oils. The asphaltene fractions were extracted by precipitation employing n-pentane and n-heptane solvents, and the coprecipitated resins were removed via Soxhlet extraction. The asphaltenes were characterized by elemental analysis, thermogravimetric analysis, laser desorption ionization mass spectrometry, Fourier-transform infrared spectroscopy, proton nuclear magnetic resonance, powder X-ray diffraction, and Raman spectroscopy. It was found that the asphaltene fractions present both a higher content of heteroatoms and a major degree of aromaticity, when n-heptane is employed. Average structural parameters were obtained by a comprehensive analysis of the experimental data, including those describing the central polycyclic aromatic hydrocarbon (PAH) cores and lateral chains. Thus, a hypothetical average molecular structure is proposed for the Argentinian asphaltenes. The average model molecules have a nucleus of PAHs arranged as pericondensed systems of 4−6 fused aromatic rings, with naphthenic groups and/or alkyl chains of 5−10 carbon long attached.
publishDate 2019
dc.date.none.fl_str_mv 2019-03
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/10915/132868
url http://sedici.unlp.edu.ar/handle/10915/132868
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/0887-0624
info:eu-repo/semantics/altIdentifier/issn/1520-5029
info:eu-repo/semantics/altIdentifier/doi/10.1021/acs.energyfuels.8b04318
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by/4.0/
Creative Commons Attribution 4.0 International (CC BY 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by/4.0/
Creative Commons Attribution 4.0 International (CC BY 4.0)
dc.format.none.fl_str_mv application/pdf
2950-2960
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
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score 12.982451

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