Elucidation of the Average Molecular Structure of Argentinian Asphaltenes

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 an...

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Autores principales: Bava, Yanina Belén, Geronés, Mariana, Buceta, David, Iglesia Rodríguez, Darío de la, López Quintela, M. Arturo, Erben, Mauricio Federico
Formato: Articulo
Lenguaje:Inglés
Publicado: 2019
Materias:
Ciencias Exactas
Química
Hydrocarbons
Aromatic compounds
Solvents
Petrochemicals
Nuclear magnetic resonance spectroscopy
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/132868
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-132868
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Exactas
Química
Hydrocarbons
Aromatic compounds
Solvents
Petrochemicals
Nuclear magnetic resonance spectroscopy
spellingShingle Ciencias Exactas
Química
Hydrocarbons
Aromatic compounds
Solvents
Petrochemicals
Nuclear magnetic resonance spectroscopy
Bava, Yanina Belén
Geronés, Mariana
Buceta, David
Iglesia Rodríguez, Darío de la
López Quintela, M. Arturo
Erben, Mauricio Federico
Elucidation of the Average Molecular Structure of Argentinian Asphaltenes
topic_facet Ciencias Exactas
Química
Hydrocarbons
Aromatic compounds
Solvents
Petrochemicals
Nuclear magnetic resonance spectroscopy
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.
format Articulo
Articulo
author Bava, Yanina Belén
Geronés, Mariana
Buceta, David
Iglesia Rodríguez, Darío de la
López Quintela, M. Arturo
Erben, Mauricio Federico
author_facet Bava, Yanina Belén
Geronés, Mariana
Buceta, David
Iglesia Rodríguez, Darío de la
López Quintela, M. Arturo
Erben, Mauricio Federico
author_sort Bava, Yanina Belén
title Elucidation of the Average Molecular Structure of Argentinian Asphaltenes
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
publishDate 2019
url http://sedici.unlp.edu.ar/handle/10915/132868
work_keys_str_mv AT bavayaninabelen elucidationoftheaveragemolecularstructureofargentinianasphaltenes
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bdutipo_str Repositorios
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