Simulación molecular de una membrana de intercambio catiónico para un sistema de electrodiálisis inversa

Ilustraciones, tablas

Autores:
Pérez Grisales, María Susana
Tipo de recurso:
Fecha de publicación:
2024
Institución:
Universidad Nacional de Colombia
Repositorio:
Universidad Nacional de Colombia
Idioma:
spa
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oai:repositorio.unal.edu.co:unal/86927
Acceso en línea:
https://repositorio.unal.edu.co/handle/unal/86927
https://repositorio.unal.edu.co/
Palabra clave:
540 - Química y ciencias afines::541 - Química física
Intercambio iónico
Dinámica molecular
Membrana de intercambio de iónico
Coeficiente de autodifusión
Interacciones moleculares
Dinámica molecular
DFT
Ion exchange membrane
Self-diffusion coefficient
Molecular interactions
Molecular dynamics
Ecuación de Schrödinger
Química computacional
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openAccess
License
Atribución-NoComercial-SinDerivadas 4.0 Internacional
id UNACIONAL2_624dbc301d37ec6c255643dfa232d68b
oai_identifier_str oai:repositorio.unal.edu.co:unal/86927
network_acronym_str UNACIONAL2
network_name_str Universidad Nacional de Colombia
repository_id_str
dc.title.spa.fl_str_mv Simulación molecular de una membrana de intercambio catiónico para un sistema de electrodiálisis inversa
dc.title.translated.eng.fl_str_mv Molecular simulation of a cation exchange membrane for a reverse electrodialysis system
title Simulación molecular de una membrana de intercambio catiónico para un sistema de electrodiálisis inversa
spellingShingle Simulación molecular de una membrana de intercambio catiónico para un sistema de electrodiálisis inversa
540 - Química y ciencias afines::541 - Química física
Intercambio iónico
Dinámica molecular
Membrana de intercambio de iónico
Coeficiente de autodifusión
Interacciones moleculares
Dinámica molecular
DFT
Ion exchange membrane
Self-diffusion coefficient
Molecular interactions
Molecular dynamics
Ecuación de Schrödinger
Química computacional
title_short Simulación molecular de una membrana de intercambio catiónico para un sistema de electrodiálisis inversa
title_full Simulación molecular de una membrana de intercambio catiónico para un sistema de electrodiálisis inversa
title_fullStr Simulación molecular de una membrana de intercambio catiónico para un sistema de electrodiálisis inversa
title_full_unstemmed Simulación molecular de una membrana de intercambio catiónico para un sistema de electrodiálisis inversa
title_sort Simulación molecular de una membrana de intercambio catiónico para un sistema de electrodiálisis inversa
dc.creator.fl_str_mv Pérez Grisales, María Susana
dc.contributor.advisor.none.fl_str_mv Castañeda Ramírez, Sergio
dc.contributor.author.none.fl_str_mv Pérez Grisales, María Susana
dc.contributor.educationalvalidator.none.fl_str_mv Sánchez Sáenz Carlos Ignacio
Moncayo Riascos Iván Darío
dc.contributor.researchgroup.spa.fl_str_mv Grupo de Ingenieria Electroquímica Griequi
dc.contributor.orcid.spa.fl_str_mv Pérez Grisales, Susana [0000000229059968]
dc.subject.ddc.spa.fl_str_mv 540 - Química y ciencias afines::541 - Química física
topic 540 - Química y ciencias afines::541 - Química física
Intercambio iónico
Dinámica molecular
Membrana de intercambio de iónico
Coeficiente de autodifusión
Interacciones moleculares
Dinámica molecular
DFT
Ion exchange membrane
Self-diffusion coefficient
Molecular interactions
Molecular dynamics
Ecuación de Schrödinger
Química computacional
dc.subject.lemb.none.fl_str_mv Intercambio iónico
Dinámica molecular
dc.subject.proposal.spa.fl_str_mv Membrana de intercambio de iónico
Coeficiente de autodifusión
Interacciones moleculares
Dinámica molecular
dc.subject.proposal.eng.fl_str_mv DFT
Ion exchange membrane
Self-diffusion coefficient
Molecular interactions
Molecular dynamics
dc.subject.wikidata.none.fl_str_mv Ecuación de Schrödinger
Química computacional
description Ilustraciones, tablas
publishDate 2024
dc.date.accessioned.none.fl_str_mv 2024-10-09T21:36:57Z
dc.date.available.none.fl_str_mv 2024-10-09T21:36:57Z
dc.date.issued.none.fl_str_mv 2024-10-07
dc.type.spa.fl_str_mv Trabajo de grado - Maestría
dc.type.driver.spa.fl_str_mv info:eu-repo/semantics/masterThesis
dc.type.version.spa.fl_str_mv info:eu-repo/semantics/acceptedVersion
dc.type.content.spa.fl_str_mv Text
dc.type.redcol.spa.fl_str_mv http://purl.org/redcol/resource_type/TM
status_str acceptedVersion
dc.identifier.uri.none.fl_str_mv https://repositorio.unal.edu.co/handle/unal/86927
dc.identifier.instname.spa.fl_str_mv Universidad Nacional de Colombia
dc.identifier.reponame.spa.fl_str_mv Repositorio Institucional Universidad Nacional de Colombia
dc.identifier.repourl.spa.fl_str_mv https://repositorio.unal.edu.co/
url https://repositorio.unal.edu.co/handle/unal/86927
https://repositorio.unal.edu.co/
identifier_str_mv Universidad Nacional de Colombia
Repositorio Institucional Universidad Nacional de Colombia
dc.language.iso.spa.fl_str_mv spa
language spa
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dc.format.extent.spa.fl_str_mv 1 recursos en línea (163 páginas)
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dc.publisher.spa.fl_str_mv Universidad Nacional de Colombia
dc.publisher.program.spa.fl_str_mv Medellín - Minas - Maestría en Ingeniería - Ingeniería Química
dc.publisher.faculty.spa.fl_str_mv Facultad de Minas
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dc.publisher.branch.spa.fl_str_mv Universidad Nacional de Colombia - Sede Medellín
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spelling Atribución-NoComercial-SinDerivadas 4.0 Internacionalhttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccesshttp://purl.org/coar/access_right/c_abf2Castañeda Ramírez, Sergio359113f0f4cd23658b9bc9182d28bf0aPérez Grisales, María Susana2e6697ba37387c84f84668c9ec7dd45eSánchez Sáenz Carlos IgnacioMoncayo Riascos Iván DaríoGrupo de Ingenieria Electroquímica GriequiPérez Grisales, Susana [0000000229059968]2024-10-09T21:36:57Z2024-10-09T21:36:57Z2024-10-07https://repositorio.unal.edu.co/handle/unal/86927Universidad Nacional de ColombiaRepositorio Institucional Universidad Nacional de Colombiahttps://repositorio.unal.edu.co/Ilustraciones, tablasLas membranas de intercambio iónico desempeñan un papel fundamental en diversas tecnologías de separación y generación de energía. En particular, su aplicación en dispositivos de electrodiálisis inversa es clave, ya que la eficiencia de estos dispositivos depende del transporte selectivo de iones a través de las membranas y es sensible a la presencia de iones multivalentes cuando se operan con aguas naturales. Estos últimos reducen significativamente la densidad de potencia (hasta la mitad) que se puede obtener y disminuyen la eficiencia del equipo. Una mayor comprensión de los fenómenos relacionados con el transporte de los iones contribuye al diseño y mejora de membranas de intercambio iónico que estén adaptadas a las necesidades de la tecnología. Típicamente, los efectos de los iones multivalentes se han evaluado experimentalmente, sin embargo, es importante realizar estudios que brinden una comprensión más detallada de los fenómenos involucrados. Para esto se usaron técnicas de simulación molecular, que permitieron estudiar la autodifusión de los iones sodio, magnesio y cloro en membranas del polímero poliéter éter cetona sulfonado (SPEEK). Este enfoque fue útil para determinar las interacciones específicas entre el grupo cargado fijo de la membrana y los iones, y para obtener información sobre el transporte de los iones monovalentes y el ion divalente, en relación con la estructura del polímero. Asimismo, se observó la transición de difusión normal a anómala cuando se disminuye el contenido de agua en la membrana, teniendo en cuenta diferentes grados de hidratación experimentalmente observados para esta membrana. También, en este trabajo se encontró que los iones divalentes se caracterizan por una difusión anómala y coeficientes de autodifusión hasta diez veces menores que los coeficientes de autodifusión observados para el sodio y los iones cloro. Finalmente, dado que los iones divalentes se unen con mayor fuerza a los grupos funcionales de la membrana, la presencia de este ion da lugar a una disminución de las distancias probables entre los grupos funcionales de la membrana y una mayor tortuosidad, lo que puede limitar la movilidad de los iones divalentes y afectar propiedades críticas como la conductividad eléctrica y la permselectividad de la membrana de intercambio iónico.Ionic exchange membranes are fundamental in various separation and energy generation technologies. Their application in reverse electrodialysis devices is crucial, as their efficiency relies on the selective transport of ions across the membranes. They are also sensitive to the presence of multivalent ions when operating in natural waters. The latter significantly reduces the obtainable power density (by up to half) and decreases the device’s efficiency. A deeper understanding of the phenomena related to ion transport contributes to the design and improvement of ion exchange membranes tailored according to the requirements of the technology. Typically, the effects of multivalent ions have been experimentally evaluated; however, it is important to conduct studies that offer a more detailed understanding of the phenomena involved. Molecular simulation techniques were used for this purpose, allowing the study of self-diffusion of sodium, magnesium, and chloride ions in membranes of the polymer sulfonated poly (ether ether ketone) (SPEEK). This approach was useful in determining the specific interactions between the fixed-charged group of the membrane and the ions and in obtaining information on the transport of monovalent ions and divalent ions concerning the polymer structure. The results showed the transition from normal to anomalous diffusion as the membrane water content decreased for experimentally reported levels of membrane hydration. Moreover, this work found that divalent ions exhibit anomalous diffusion and have self-diffusion coefficients up to ten times lower than those of sodium and chloride ions. Finally, since divalent ions bind stronger to membrane functional groups, the presence of this ion results in decreased probable distances between membrane functional groups and increased tortuosity, which may limit the mobility of divalent ions and affect critical properties such as electrical conductivity and permselectivity of the ion exchange membrane.Contiene imágenes, ilustraciones y tablas.MaestríaMagíster en Ingeniería - Ingeniería QuímicaQuímica ComputacionalÁrea Curricular en Ciencias Naturales1 recursos en línea (163 páginas)application/pdfspaUniversidad Nacional de ColombiaMedellín - Minas - Maestría en Ingeniería - Ingeniería QuímicaFacultad de MinasMedellínUniversidad Nacional de Colombia - Sede Medellín540 - Química y ciencias afines::541 - Química físicaIntercambio iónicoDinámica molecularMembrana de intercambio de iónicoCoeficiente de autodifusiónInteracciones molecularesDinámica molecularDFTIon exchange membraneSelf-diffusion coefficientMolecular interactionsMolecular dynamicsEcuación de SchrödingerQuímica computacionalSimulación molecular de una membrana de intercambio catiónico para un sistema de electrodiálisis inversaMolecular simulation of a cation exchange membrane for a reverse electrodialysis systemTrabajo de grado - Maestríainfo:eu-repo/semantics/masterThesisinfo:eu-repo/semantics/acceptedVersionTexthttp://purl.org/redcol/resource_type/TME. 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Tanaka, “Measurements of self-diffusion coefficients of water in pure water and in aqueous electrolyte solutions,” Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases, vol. 71, pp. 1127–1131, 1975.AdministradoresLICENSElicense.txtlicense.txttext/plain; charset=utf-85879https://repositorio.unal.edu.co/bitstream/unal/86927/1/license.txteb34b1cf90b7e1103fc9dfd26be24b4aMD51ORIGINAL1017233187.2024.pdf1017233187.2024.pdfTesis de Maestría en Ciencias - Químicaapplication/pdf9950228https://repositorio.unal.edu.co/bitstream/unal/86927/3/1017233187.2024.pdfaa9eceeb4c4d52a765ac50fac25020acMD53THUMBNAIL1017233187.2024.pdf.jpg1017233187.2024.pdf.jpgGenerated Thumbnailimage/jpeg4443https://repositorio.unal.edu.co/bitstream/unal/86927/4/1017233187.2024.pdf.jpgde6d6475b555f778fba418ca375de68cMD54unal/86927oai:repositorio.unal.edu.co:unal/869272024-10-09 23:52:00.676Repositorio Institucional Universidad Nacional de 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