The Stabilization of Asphaltenes in Different Crude Fractions: A Molecular Approach
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Journal of the Brazilian Chemical Society (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532021000400741 |
Resumo: | The conditions of petroleum extraction may allow asphaltenes to precipitate, causing deposition that clogs wells, pipes and equipment, consequently reducing productivity. In this work, the solubility parameters and precipitation onset of polar fractions of heavy crudes from Brazilian fields were estimated using a simplified system of n-heptane/toluene mixtures. Asphaltenes were extracted by two different methods with regard to pressure and temperature. The samples were physically and chemically characterized, and both density (1053-1159 kg m-3) and molecular weight (1176-5316 g mol-1) were estimated based on the density of diluted asphaltenes in toluene solutions. The solubility of those fractions was studied as well as their solubility parameter (ca. 19-23 MPa0.5) based on regular solution theory, Flory-Hüggins theory and empirical correlation. The influence of asphaltene concentration (between 0.5 and 5.0 g L-1) on the solubility parameter and precipitation onset was studied, and a strong linear correlation between them was not found. |
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The Stabilization of Asphaltenes in Different Crude Fractions: A Molecular Approachasphaltenessolid residuesolubility parameterprecipitation onsetn-heptane/toluene mixturesThe conditions of petroleum extraction may allow asphaltenes to precipitate, causing deposition that clogs wells, pipes and equipment, consequently reducing productivity. In this work, the solubility parameters and precipitation onset of polar fractions of heavy crudes from Brazilian fields were estimated using a simplified system of n-heptane/toluene mixtures. Asphaltenes were extracted by two different methods with regard to pressure and temperature. The samples were physically and chemically characterized, and both density (1053-1159 kg m-3) and molecular weight (1176-5316 g mol-1) were estimated based on the density of diluted asphaltenes in toluene solutions. The solubility of those fractions was studied as well as their solubility parameter (ca. 19-23 MPa0.5) based on regular solution theory, Flory-Hüggins theory and empirical correlation. The influence of asphaltene concentration (between 0.5 and 5.0 g L-1) on the solubility parameter and precipitation onset was studied, and a strong linear correlation between them was not found.Sociedade Brasileira de Química2021-04-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532021000400741Journal of the Brazilian Chemical Society v.32 n.4 2021reponame:Journal of the Brazilian Chemical Society (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.21577/0103-5053.20200226info:eu-repo/semantics/openAccessLordeiro,Faissen B.Altoé,RodrigoHartmann,DanielaFilipe,Eduardo J. M.González,GasparLucas,Elizabete F.eng2021-03-25T00:00:00Zoai:scielo:S0103-50532021000400741Revistahttp://jbcs.sbq.org.brONGhttps://old.scielo.br/oai/scielo-oai.php||office@jbcs.sbq.org.br1678-47900103-5053opendoar:2021-03-25T00:00Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)false |
dc.title.none.fl_str_mv |
The Stabilization of Asphaltenes in Different Crude Fractions: A Molecular Approach |
title |
The Stabilization of Asphaltenes in Different Crude Fractions: A Molecular Approach |
spellingShingle |
The Stabilization of Asphaltenes in Different Crude Fractions: A Molecular Approach Lordeiro,Faissen B. asphaltenes solid residue solubility parameter precipitation onset n-heptane/toluene mixtures |
title_short |
The Stabilization of Asphaltenes in Different Crude Fractions: A Molecular Approach |
title_full |
The Stabilization of Asphaltenes in Different Crude Fractions: A Molecular Approach |
title_fullStr |
The Stabilization of Asphaltenes in Different Crude Fractions: A Molecular Approach |
title_full_unstemmed |
The Stabilization of Asphaltenes in Different Crude Fractions: A Molecular Approach |
title_sort |
The Stabilization of Asphaltenes in Different Crude Fractions: A Molecular Approach |
author |
Lordeiro,Faissen B. |
author_facet |
Lordeiro,Faissen B. Altoé,Rodrigo Hartmann,Daniela Filipe,Eduardo J. M. González,Gaspar Lucas,Elizabete F. |
author_role |
author |
author2 |
Altoé,Rodrigo Hartmann,Daniela Filipe,Eduardo J. M. González,Gaspar Lucas,Elizabete F. |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Lordeiro,Faissen B. Altoé,Rodrigo Hartmann,Daniela Filipe,Eduardo J. M. González,Gaspar Lucas,Elizabete F. |
dc.subject.por.fl_str_mv |
asphaltenes solid residue solubility parameter precipitation onset n-heptane/toluene mixtures |
topic |
asphaltenes solid residue solubility parameter precipitation onset n-heptane/toluene mixtures |
description |
The conditions of petroleum extraction may allow asphaltenes to precipitate, causing deposition that clogs wells, pipes and equipment, consequently reducing productivity. In this work, the solubility parameters and precipitation onset of polar fractions of heavy crudes from Brazilian fields were estimated using a simplified system of n-heptane/toluene mixtures. Asphaltenes were extracted by two different methods with regard to pressure and temperature. The samples were physically and chemically characterized, and both density (1053-1159 kg m-3) and molecular weight (1176-5316 g mol-1) were estimated based on the density of diluted asphaltenes in toluene solutions. The solubility of those fractions was studied as well as their solubility parameter (ca. 19-23 MPa0.5) based on regular solution theory, Flory-Hüggins theory and empirical correlation. The influence of asphaltene concentration (between 0.5 and 5.0 g L-1) on the solubility parameter and precipitation onset was studied, and a strong linear correlation between them was not found. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-04-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532021000400741 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532021000400741 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.21577/0103-5053.20200226 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Sociedade Brasileira de Química |
publisher.none.fl_str_mv |
Sociedade Brasileira de Química |
dc.source.none.fl_str_mv |
Journal of the Brazilian Chemical Society v.32 n.4 2021 reponame:Journal of the Brazilian Chemical Society (Online) instname:Sociedade Brasileira de Química (SBQ) instacron:SBQ |
instname_str |
Sociedade Brasileira de Química (SBQ) |
instacron_str |
SBQ |
institution |
SBQ |
reponame_str |
Journal of the Brazilian Chemical Society (Online) |
collection |
Journal of the Brazilian Chemical Society (Online) |
repository.name.fl_str_mv |
Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ) |
repository.mail.fl_str_mv |
||office@jbcs.sbq.org.br |
_version_ |
1750318183982563328 |