1. Universidade Federal da Bahia
  2. Escola Politécnica
  3. Programa de Pós-Graduação em Engenharia Química (PPEQ)
  4. Tese (PPEQ)
Use este identificador para citar ou linkar para este item: https://repositorio.ufba.br/handle/ri/38756
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Campo DCValorIdioma
dc.creatorFerreira, Gabriela Fontes Deiró-
dc.date.accessioned2023-12-21T11:40:13Z-
dc.date.available2023-12-21T11:40:13Z-
dc.date.issued2023-10-31-
dc.identifier.citationFerreira, Gabriela Fontes Deiró. Estudo do processo de micelização de líquido iônicos próticos para aplicação em recuperação avançada de petróleo. Tese (Doutorado) - Escola Politécnica, Universidade Federal da Bahia. Salvador, p.120. 2023.pt_BR
dc.identifier.urihttps://repositorio.ufba.br/handle/ri/38756-
dc.description.abstractThe micelle formation has been studied in recent years due to the various applications of micellar systems in areas such as chemistry, petrochemistry, pharmaceuticals, and the environment. Micelles are formed by amphiphilic substances, denominated as surfactants. However, a notable evolution in this field is the increasing use of ionic liquids (ILs) as an alternative to commercial surfactants in enhanced oil recovery. Ionic liquids (ILs) are organic salts that have surfactant properties, which gives them several applications in the form of micelle, making them a promising option in enhanced oil recovery processes. Due to these characteristics, many studies have been dedicated to evaluating the micelle formation process using ionic liquids. However, most published works explore aprotic ionic liquids, and more published data on protic ionic liquids needs to be published. Ionic liquids can decrease interfacial and surface tension, showing potential for oil recovery. Therefore, this work proposes to study six ionic liquids based on hexanoic acid as anion and cations with different structures. To synthesize these liquids, substances with nitrogenous and hydrogenated groups were used as a base (cation) to evaluate their influence on the formation of micelles. Through a statistical design of experiments of the Rotational Central Composite Design (RCCD) type, it was possible to determine the influence of the concentration of ionic liquid and NaCl on the interfacial tension of a solution of ionic liquid and oil since this parameter is directly related to the tendency of micellization. The results showed that as their concentration increases, ionic liquids decrease the interfacial tension to a point where it increases again. This effect is mitigated by adding salt, which causes the interfacial tension to decrease even at higher ionic liquid concentrations. A thermodynamic approach was used to describe and predict the conditions for micelle formation from solutions of protic ILs studied in this work by minimizing the Gibbs free energy. The critical micellar concentration was obtained from this approach, which was compared with the experimental values for model validation. The proposed thermodynamic modeling agreed with the experimental data for the first critical micellar concentration value, describing a spherical geometry for the micelles.pt_BR
dc.description.sponsorshipFAPESBpt_BR
dc.languageporpt_BR
dc.publisherUniversidade Federal da Bahiapt_BR
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Brazil*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/br/*
dc.subjectSurfactantespt_BR
dc.subjectTensão Interfacialpt_BR
dc.subjectTensão Superficialpt_BR
dc.subjectEnergia Livre de Gibbspt_BR
dc.subjectLíquido iônicopt_BR
dc.subjectPetróleopt_BR
dc.subject.otherSurfactantspt_BR
dc.subject.otherInterfacial tensionpt_BR
dc.subject.otherSurface tensionpt_BR
dc.subject.otherGibbs free energypt_BR
dc.subject.otherIonic liquidpt_BR
dc.subject.otherPetroleumpt_BR
dc.titleEstudo do processo de micelização de líquido iônicos próticos para aplicação em recuperação avançada de petróleopt_BR
dc.title.alternativeStudy of the micellization process of protic ionic liquids for application in advanced oil recoverypt_BR
dc.typeTesept_BR
dc.contributor.refereesda Silva, Ana Cristina Morais-
dc.contributor.refereesSimonelli, George-
dc.publisher.programPrograma de Pós-Graduação em Engenharia Quimica (PPEQ) pt_BR
dc.publisher.initialsUFBApt_BR
dc.publisher.countryBrasilpt_BR
dc.subject.cnpqCNPQ::ENGENHARIAS::ENGENHARIA QUIMICA::PROCESSOS INDUSTRIAIS DE ENGENHARIA QUIMICA::PROCESSOS ORGANICOSpt_BR
dc.contributor.advisor1Lobato, Ana Katerine de Carvalho Lima-
dc.contributor.advisor1Lattesttp://lattes.cnpq.br/0152838979924698pt_BR
dc.contributor.advisor-co1Santos, Luiz Carlos Lobato dos-
dc.contributor.advisor-co1Latteshttp://lattes.cnpq.br/8891045064075199pt_BR
dc.contributor.advisor-co2Silva, Silvana Mattedi e-
dc.contributor.advisor-co2Latteshttp://lattes.cnpq.br/8741124364246075pt_BR
dc.contributor.referee1Lobato, Ana Katerine de Carvalho Lima-
dc.contributor.referee1Latteshttp://lattes.cnpq.br/0152838979924698pt_BR
dc.contributor.referee2dos Santos, Luiz Carlos Lobato-
dc.contributor.referee2Latteshttp://lattes.cnpq.br/8891045064075199pt_BR
dc.contributor.referee3Silva, Silvana Mattedi e-
dc.contributor.referee3Latteshttp://lattes.cnpq.br/8741124364246075pt_BR
dc.contributor.referee4Filho, Osvaldo Chiavone-
dc.contributor.referee4Latteshttp://lattes.cnpq.br/2621516646153655pt_BR
dc.contributor.referee5Rodrigues, Pamela Dias-
dc.contributor.referee5Latteshttp://lattes.cnpq.br/4554329622469373pt_BR
dc.creator.Latteshttp://lattes.cnpq.br/6837902462644236pt_BR
dc.description.resumoO fenômeno de micelização tem sido amplamente estudado nos últimos anos devido às diversas aplicações de sistemas micelares em áreas como química, petroquímica, farmacêutica e ambiental. As micelas são formadas por substâncias anfifílicas, geralmente conhecidas como surfactantes ou tensoativos. Contudo, uma evolução notável nesse campo é a crescente utilização de líquidos iônicos (LI's) como alternativa aos surfactantes comerciais na recuperação avançada de petróleo. Os líquidos iônicos são sais orgânicos que exibem propriedades surfactantes, o que lhes permite serem aplicados na formação de micelas, tornando-os uma opção promissora em processos de recuperação avançada de petróleo. Devido à essas características, muitos estudos têm se dedicado a avaliar o processo de formação de micelas utilizando líquidos iônicos, embora a maioria deles tenha se concentrado nos líquidos iônicos apróticos, havendo uma lacuna de informações sobre os líquidos iônicos próticos. Os líquidos iônicos são capazes de diminuir a tensão interfacial e superficial, mostrando potencial para recuperação de petróleo. Em vista disso, este trabalho propõe estudar seis líquidos iônicos a base de ácido hexanóico como ânion, e cátions com diferentes estruturas. Para síntese desses líquidos utilizou-se como base (cátion) substâncias com grupos nitrogenados e hidrogenados com intuito de avaliar sua influência na formação de micelas. Através de um planejamento estatístico de experimentos, do tipo Delineamento Composto Central Rotacional (DCCR) foi possível determinar a influência da concentração de líquido iônico e de NaCl na tensão interfacial de uma solução de líquido iônico e óleo, uma vez que esse parâmetro está diretamente relacionado a tendência de micelização. Os resultados mostraram que à medida que aumenta a sua concentração, os líquidos iônicos diminuem a tensão interfacial até determinado ponto onde começa a aumentar novamente. Esse efeito é amenizado pela adição de NaCl, que faz com que a tensão interfacial diminua mesmo em concentrações mais elevadas de líquido iônico. Uma abordagem termodinâmica foi utilizada para descrever/prever as condições de formação de micelas a partir de soluções de LI’s próticos estudadas neste trabalho, através da minimização da energia livre de Gibbs. A partir disso, obteve-se a concentração micelar crítica que foi comparada com os valores experimentais para validação do modelo. A modelagem termodinâmica proposta apresentou boa concordância com os dados experimentais para o primeiro valor de concentração micelar crítica, descrevendo uma geometria esférica para as micelas.pt_BR
dc.publisher.departmentEscola Politécnicapt_BR
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Fluid Phase Equilibria, v. 360, p. 139–145, 2013.pt_BR
dc.contributor.refereesLatteshttp://lattes.cnpq.br/0604137114629084pt_BR
dc.contributor.refereesLatteshttp://lattes.cnpq.br/3421092159521710pt_BR
dc.type.degreeDoutoradopt_BR
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