Caracterización interfacial de emulsiones agua-aceite (w/o) estabilizadas por asfáltenos usando espectrometría de masas
En este estudio se preparó una emulsión W/O con agua desionizada y una solución de asfaltenos purificados como moléculas surfactantes. El análisis de estabilidad de la emulsión W/O reveló procesos de sedimentación, variación del tamaño de las gotas de agua dispersas y fenómenos de floculación pero n...
- Autores:
-
Alarcon Hernandez, Elizabeth
- Tipo de recurso:
- http://purl.org/coar/version/c_b1a7d7d4d402bcce
- Fecha de publicación:
- 2016
- Institución:
- Universidad Industrial de Santander
- Repositorio:
- Repositorio UIS
- Idioma:
- spa
- OAI Identifier:
- oai:noesis.uis.edu.co:20.500.14071/34950
- Palabra clave:
- Emulsiones
Espectrometría
Interfacial
Metodologías
In this study
we prepared a W/O emulsion using a fraction of asphaltenes as emulsifiers to stabilize emulsions principal stabilizing surfactant molecules. Although the emulsion stability analysis reveals sedimentation
size variation of the water droplets and flocculation processes
the emulsion was highly stable for days as no free water was observed. The interfacial material was isolated from a W/O emulsion using two approaches previously reported. The first one
involves an extraction of the molecules weakly bound to the interface using toluene 28 and the second
uses heavy water36 as the dispersed phase to separate the most polar molecules by density differences. Infrared spectra
obtained for both interfaces
show characteristic bands associated with oxygenated and aromatic compounds. High resolution mass spectrometry shows the presence of abundant aromatic
sulfur and nitrogen compounds
detected as protonated and radical cations. For the most relative abundant heteroatom classes
we calculated planar limits that ranges between 0
7 and 0
8 for both interfaces suggesting a possible linear addition of polycyclic aromatic rings like in a structural peri-condensation chemical structure. Finally
thermogravimetric analysis (TGA) revealed that isolated interfaces exhibited less thermal stability than the whole asphaltenes
due to the presence of more volatile compounds and degradation of molecules with nitrogen
sulfur and oxygen above 400°C. On the other hand
low molecular weight naphthenic acids can act as demulsifiers
displacing the aromatic asphaltenes molecules found on the interface and destabilizing the W/O emulsion.
- Rights
- License
- Attribution-NonCommercial 4.0 International (CC BY-NC 4.0)
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dc.title.none.fl_str_mv |
Caracterización interfacial de emulsiones agua-aceite (w/o) estabilizadas por asfáltenos usando espectrometría de masas |
dc.title.english.none.fl_str_mv |
Emulsions, Spectrometry, Interfacial, Methodologies |
title |
Caracterización interfacial de emulsiones agua-aceite (w/o) estabilizadas por asfáltenos usando espectrometría de masas |
spellingShingle |
Caracterización interfacial de emulsiones agua-aceite (w/o) estabilizadas por asfáltenos usando espectrometría de masas Emulsiones Espectrometría Interfacial Metodologías In this study we prepared a W/O emulsion using a fraction of asphaltenes as emulsifiers to stabilize emulsions principal stabilizing surfactant molecules. Although the emulsion stability analysis reveals sedimentation size variation of the water droplets and flocculation processes the emulsion was highly stable for days as no free water was observed. The interfacial material was isolated from a W/O emulsion using two approaches previously reported. The first one involves an extraction of the molecules weakly bound to the interface using toluene 28 and the second uses heavy water36 as the dispersed phase to separate the most polar molecules by density differences. Infrared spectra obtained for both interfaces show characteristic bands associated with oxygenated and aromatic compounds. High resolution mass spectrometry shows the presence of abundant aromatic sulfur and nitrogen compounds detected as protonated and radical cations. For the most relative abundant heteroatom classes we calculated planar limits that ranges between 0 7 and 0 8 for both interfaces suggesting a possible linear addition of polycyclic aromatic rings like in a structural peri-condensation chemical structure. Finally thermogravimetric analysis (TGA) revealed that isolated interfaces exhibited less thermal stability than the whole asphaltenes due to the presence of more volatile compounds and degradation of molecules with nitrogen sulfur and oxygen above 400°C. On the other hand low molecular weight naphthenic acids can act as demulsifiers displacing the aromatic asphaltenes molecules found on the interface and destabilizing the W/O emulsion. |
title_short |
Caracterización interfacial de emulsiones agua-aceite (w/o) estabilizadas por asfáltenos usando espectrometría de masas |
title_full |
Caracterización interfacial de emulsiones agua-aceite (w/o) estabilizadas por asfáltenos usando espectrometría de masas |
title_fullStr |
Caracterización interfacial de emulsiones agua-aceite (w/o) estabilizadas por asfáltenos usando espectrometría de masas |
title_full_unstemmed |
Caracterización interfacial de emulsiones agua-aceite (w/o) estabilizadas por asfáltenos usando espectrometría de masas |
title_sort |
Caracterización interfacial de emulsiones agua-aceite (w/o) estabilizadas por asfáltenos usando espectrometría de masas |
dc.creator.fl_str_mv |
Alarcon Hernandez, Elizabeth |
dc.contributor.advisor.none.fl_str_mv |
Combariza Montañez, Marianny Yajaira |
dc.contributor.author.none.fl_str_mv |
Alarcon Hernandez, Elizabeth |
dc.subject.none.fl_str_mv |
Emulsiones Espectrometría Interfacial Metodologías |
topic |
Emulsiones Espectrometría Interfacial Metodologías In this study we prepared a W/O emulsion using a fraction of asphaltenes as emulsifiers to stabilize emulsions principal stabilizing surfactant molecules. Although the emulsion stability analysis reveals sedimentation size variation of the water droplets and flocculation processes the emulsion was highly stable for days as no free water was observed. The interfacial material was isolated from a W/O emulsion using two approaches previously reported. The first one involves an extraction of the molecules weakly bound to the interface using toluene 28 and the second uses heavy water36 as the dispersed phase to separate the most polar molecules by density differences. Infrared spectra obtained for both interfaces show characteristic bands associated with oxygenated and aromatic compounds. High resolution mass spectrometry shows the presence of abundant aromatic sulfur and nitrogen compounds detected as protonated and radical cations. For the most relative abundant heteroatom classes we calculated planar limits that ranges between 0 7 and 0 8 for both interfaces suggesting a possible linear addition of polycyclic aromatic rings like in a structural peri-condensation chemical structure. Finally thermogravimetric analysis (TGA) revealed that isolated interfaces exhibited less thermal stability than the whole asphaltenes due to the presence of more volatile compounds and degradation of molecules with nitrogen sulfur and oxygen above 400°C. On the other hand low molecular weight naphthenic acids can act as demulsifiers displacing the aromatic asphaltenes molecules found on the interface and destabilizing the W/O emulsion. |
dc.subject.keyword.none.fl_str_mv |
In this study we prepared a W/O emulsion using a fraction of asphaltenes as emulsifiers to stabilize emulsions principal stabilizing surfactant molecules. Although the emulsion stability analysis reveals sedimentation size variation of the water droplets and flocculation processes the emulsion was highly stable for days as no free water was observed. The interfacial material was isolated from a W/O emulsion using two approaches previously reported. The first one involves an extraction of the molecules weakly bound to the interface using toluene 28 and the second uses heavy water36 as the dispersed phase to separate the most polar molecules by density differences. Infrared spectra obtained for both interfaces show characteristic bands associated with oxygenated and aromatic compounds. High resolution mass spectrometry shows the presence of abundant aromatic sulfur and nitrogen compounds detected as protonated and radical cations. For the most relative abundant heteroatom classes we calculated planar limits that ranges between 0 7 and 0 8 for both interfaces suggesting a possible linear addition of polycyclic aromatic rings like in a structural peri-condensation chemical structure. Finally thermogravimetric analysis (TGA) revealed that isolated interfaces exhibited less thermal stability than the whole asphaltenes due to the presence of more volatile compounds and degradation of molecules with nitrogen sulfur and oxygen above 400°C. On the other hand low molecular weight naphthenic acids can act as demulsifiers displacing the aromatic asphaltenes molecules found on the interface and destabilizing the W/O emulsion. |
description |
En este estudio se preparó una emulsión W/O con agua desionizada y una solución de asfaltenos purificados como moléculas surfactantes. El análisis de estabilidad de la emulsión W/O reveló procesos de sedimentación, variación del tamaño de las gotas de agua dispersas y fenómenos de floculación pero no llevaron a la separación de las fases por liberación de agua. La extracción del material interfacial de la emulsión W/O se realizó empleando dos procedimientos previamente reportados en la literatura que involucran una separación por extracción con tolueno28 y otra por diferencia de densidades usando agua deuterada36 (D2O) como fase dispersa en la emulsión. El análisis por espectroscopia infrarroja del material interfacial aislado por ambas metodologías, mostró bandas asociadas a compuestos oxigenados y aromáticos que fueron detectados también por espectrometría de masas con ionización por desorción láser (LDI), en modo ion positivo. El análisis realizado al material interfacial, por esta técnica de ionización, muestra la presencia de compuestos aromáticos con átomos de azufre y nitrógeno en su estructura, los cuales fueron detectados como cationes protonados y radicales. Para las clases detectadas (HC, N, S), con mayor abundancia relativa, se calculó la pendiente o límite planar de las gráficas construidas con el equivalente de doble enlace (DBE) versus el número de átomos de carbono. Estos valores permitieron obtener información estructural sobre el crecimiento de los núcleos aromáticos. De esta manera, se determinaron intervalos entre 0.7-0.8 para la interface aislada con agua deuterada (D2O) y para el material interfacial aislado con tolueno encontrándose un modelo estructural de peri-condensación. Finalmente el análisis termogravimétrico (TGA) indicó que las interfaces aisladas presentan menor estabilidad térmica que la fracción completa de asfaltenos. Adicionalmente, el estudio de la influencia de ácidos nafténicos en la emulsión mostró que los ácidos pueden actuar como demulsificantes por su carácter polar. |
publishDate |
2016 |
dc.date.available.none.fl_str_mv |
2016 2024-03-03T22:43:28Z |
dc.date.created.none.fl_str_mv |
2016 |
dc.date.issued.none.fl_str_mv |
2016 |
dc.date.accessioned.none.fl_str_mv |
2024-03-03T22:43:28Z |
dc.type.local.none.fl_str_mv |
Tesis/Trabajo de grado - Monografía - Pregrado |
dc.type.hasversion.none.fl_str_mv |
http://purl.org/coar/resource_type/c_7a1f |
dc.type.coar.none.fl_str_mv |
http://purl.org/coar/version/c_b1a7d7d4d402bcce |
format |
http://purl.org/coar/version/c_b1a7d7d4d402bcce |
dc.identifier.uri.none.fl_str_mv |
https://noesis.uis.edu.co/handle/20.500.14071/34950 |
dc.identifier.instname.none.fl_str_mv |
Universidad Industrial de Santander |
dc.identifier.reponame.none.fl_str_mv |
Universidad Industrial de Santander |
dc.identifier.repourl.none.fl_str_mv |
https://noesis.uis.edu.co |
url |
https://noesis.uis.edu.co/handle/20.500.14071/34950 https://noesis.uis.edu.co |
identifier_str_mv |
Universidad Industrial de Santander |
dc.language.iso.none.fl_str_mv |
spa |
language |
spa |
dc.rights.none.fl_str_mv |
http://creativecommons.org/licenses/by/4.0/ |
dc.rights.coar.fl_str_mv |
http://purl.org/coar/access_right/c_abf2 |
dc.rights.license.none.fl_str_mv |
Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) |
dc.rights.uri.none.fl_str_mv |
http://creativecommons.org/licenses/by-nc/4.0 |
dc.rights.creativecommons.none.fl_str_mv |
Atribución-NoComercial-SinDerivadas 4.0 Internacional (CC BY-NC-ND 4.0) |
rights_invalid_str_mv |
Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) http://creativecommons.org/licenses/by/4.0/ http://creativecommons.org/licenses/by-nc/4.0 Atribución-NoComercial-SinDerivadas 4.0 Internacional (CC BY-NC-ND 4.0) http://purl.org/coar/access_right/c_abf2 |
dc.format.mimetype.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidad Industrial de Santander |
dc.publisher.faculty.none.fl_str_mv |
Facultad de Ciencias |
dc.publisher.program.none.fl_str_mv |
Química |
dc.publisher.school.none.fl_str_mv |
Escuela de Química |
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Universidad Industrial de Santander |
institution |
Universidad Industrial de Santander |
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Attribution-NonCommercial 4.0 International (CC BY-NC 4.0)http://creativecommons.org/licenses/by/4.0/http://creativecommons.org/licenses/by-nc/4.0Atribución-NoComercial-SinDerivadas 4.0 Internacional (CC BY-NC-ND 4.0)http://purl.org/coar/access_right/c_abf2Combariza Montañez, Marianny YajairaAlarcon Hernandez, Elizabeth2024-03-03T22:43:28Z20162024-03-03T22:43:28Z20162016https://noesis.uis.edu.co/handle/20.500.14071/34950Universidad Industrial de SantanderUniversidad Industrial de Santanderhttps://noesis.uis.edu.coEn este estudio se preparó una emulsión W/O con agua desionizada y una solución de asfaltenos purificados como moléculas surfactantes. El análisis de estabilidad de la emulsión W/O reveló procesos de sedimentación, variación del tamaño de las gotas de agua dispersas y fenómenos de floculación pero no llevaron a la separación de las fases por liberación de agua. La extracción del material interfacial de la emulsión W/O se realizó empleando dos procedimientos previamente reportados en la literatura que involucran una separación por extracción con tolueno28 y otra por diferencia de densidades usando agua deuterada36 (D2O) como fase dispersa en la emulsión. El análisis por espectroscopia infrarroja del material interfacial aislado por ambas metodologías, mostró bandas asociadas a compuestos oxigenados y aromáticos que fueron detectados también por espectrometría de masas con ionización por desorción láser (LDI), en modo ion positivo. El análisis realizado al material interfacial, por esta técnica de ionización, muestra la presencia de compuestos aromáticos con átomos de azufre y nitrógeno en su estructura, los cuales fueron detectados como cationes protonados y radicales. Para las clases detectadas (HC, N, S), con mayor abundancia relativa, se calculó la pendiente o límite planar de las gráficas construidas con el equivalente de doble enlace (DBE) versus el número de átomos de carbono. Estos valores permitieron obtener información estructural sobre el crecimiento de los núcleos aromáticos. De esta manera, se determinaron intervalos entre 0.7-0.8 para la interface aislada con agua deuterada (D2O) y para el material interfacial aislado con tolueno encontrándose un modelo estructural de peri-condensación. Finalmente el análisis termogravimétrico (TGA) indicó que las interfaces aisladas presentan menor estabilidad térmica que la fracción completa de asfaltenos. Adicionalmente, el estudio de la influencia de ácidos nafténicos en la emulsión mostró que los ácidos pueden actuar como demulsificantes por su carácter polar.PregradoQuímicoCharacterization interfacial water-oil emulsions (w / o) stabilized by asphaltenes using mass spectrometryapplication/pdfspaUniversidad Industrial de SantanderFacultad de CienciasQuímicaEscuela de QuímicaEmulsionesEspectrometríaInterfacialMetodologíasIn this studywe prepared a W/O emulsion using a fraction of asphaltenes as emulsifiers to stabilize emulsions principal stabilizing surfactant molecules. Although the emulsion stability analysis reveals sedimentationsize variation of the water droplets and flocculation processesthe emulsion was highly stable for days as no free water was observed. The interfacial material was isolated from a W/O emulsion using two approaches previously reported. The first oneinvolves an extraction of the molecules weakly bound to the interface using toluene 28 and the seconduses heavy water36 as the dispersed phase to separate the most polar molecules by density differences. Infrared spectraobtained for both interfacesshow characteristic bands associated with oxygenated and aromatic compounds. High resolution mass spectrometry shows the presence of abundant aromaticsulfur and nitrogen compoundsdetected as protonated and radical cations. For the most relative abundant heteroatom classeswe calculated planar limits that ranges between 07 and 08 for both interfaces suggesting a possible linear addition of polycyclic aromatic rings like in a structural peri-condensation chemical structure. Finallythermogravimetric analysis (TGA) revealed that isolated interfaces exhibited less thermal stability than the whole asphaltenesdue to the presence of more volatile compounds and degradation of molecules with nitrogensulfur and oxygen above 400°C. On the other handlow molecular weight naphthenic acids can act as demulsifiersdisplacing the aromatic asphaltenes molecules found on the interface and destabilizing the W/O emulsion.Caracterización interfacial de emulsiones agua-aceite (w/o) estabilizadas por asfáltenos usando espectrometría de masasEmulsions, Spectrometry, Interfacial, MethodologiesTesis/Trabajo de grado - Monografía - Pregradohttp://purl.org/coar/resource_type/c_7a1fhttp://purl.org/coar/version/c_b1a7d7d4d402bcceORIGINALCarta de autorización.pdfapplication/pdf372468https://noesis.uis.edu.co/bitstreams/ddb1c97a-2e2a-4b9f-b07a-9030306bd705/download643a2d89b1fbc53fdbb39589e9f0a7a7MD51Documento.pdfapplication/pdf1734150https://noesis.uis.edu.co/bitstreams/a939c33e-ad82-4003-8bcc-e750b068af8d/downloadb6360a9044d00b4e1e0471fad799b935MD52Nota de proyecto.pdfapplication/pdf236687https://noesis.uis.edu.co/bitstreams/0e6b261d-a911-4f03-9fc3-5b9fa1862a59/download9ddc9a75e985866988a14bdae54760e8MD5320.500.14071/34950oai:noesis.uis.edu.co:20.500.14071/349502024-03-03 17:43:28.963http://creativecommons.org/licenses/by-nc/4.0http://creativecommons.org/licenses/by/4.0/open.accesshttps://noesis.uis.edu.coDSpace at UISnoesis@uis.edu.co |