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dc.contributor.authorAssis, Rayane Miranda
dc.date.accessioned2023-12-22T02:46:08Z-
dc.date.available2023-12-22T02:46:08Z-
dc.date.issued2018-12-20
dc.identifier.citationASSIS, Rayane Miranda. Determinação dos coeficientes de atividade em diluição infinita de álcoois em água na presença de sais de sódio por microextração em fase sólida associada a cromatografia a gás (HS-SPME-GC/FID). 2019. 132 f. Dissertação. (Mestrado em Engenharia Química) - Instituto de Tecnologia, Universidade Federal Rural do Rio de Janeiro, Seropédica, RJ, 2018.por
dc.identifier.urihttps://rima.ufrrj.br/jspui/handle/20.500.14407/13399-
dc.description.abstractEm geral, processos de separação e purificação são responsáveis pela maior parte dos custos operacionais e de projeto de instalações industriais. Por isso, o conhecimento de propriedades físicas e de transporte, assim como propriedades de equilíbrio são fundamentais para o projeto do processo. No entanto, a disponibilidade limitada de dados experimentais, particularmente devido à composição e estrutura complexa de determinados produtos, raramente atende à real demanda da indústria. Neste trabalho, a microextração em fase sólida – SPME, aliada a cromatografia a gás foi utilizada para avaliar a influência de diferentes concentrações de sais inorgânicos no coeficiente de atividade em diluição infinita de sistemas álcool/água/sal nas temperaturas de 25, 45 e 60 °C. A técnica utilizada é rápida, de baixo custo e de fácil implementação, que aliada às equações específicas da metodologia, permitiu determinar o coeficiente de atividade na diluição infinita avaliando a influência da concentração de sal e da temperatura da solução. Os álcoois estudados foram etanol, propanol e butanol. E os sais estudados foram, respectivamente, Nitrato de Sódio (NaNO3), Carbonato de Sódio (Na2CO3) e Sulfato de Sódio (Na2SO4), em concentrações de 0,528, 1,368 e 2,121 mol/kg de água. Entre os sais estudados, o Na2SO4 e o Na2CO3 apresentaram melhor influência na separação dos álcoois estudados na diluição infinita. Os resultados obtidos indicam que a técnica utilizada pode ser considerada um método alternativo para a determinação do coeficiente de atividade na diluição infinita.por
dc.description.sponsorshipCAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superiorpor
dc.description.sponsorshipFAPERJ - Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiropor
dc.formatapplication/pdf*
dc.languageporpor
dc.publisherUniversidade Federal Rural do Rio de Janeiropor
dc.rightsAcesso Abertopor
dc.subjectCromatografiapor
dc.subjectCoeficiente de partiçãopor
dc.subjectCoeficiente de atividadepor
dc.subjectEquilíbrio líquido-vaporpor
dc.subjectSalting-outpor
dc.subjectMicroextração em fase sólidapor
dc.subjectChromatography, , , , ,eng
dc.subjectPartition coefficienteng
dc.subjectActivity coefficienteng
dc.subjectLiquid-vapor equilibriumeng
dc.subjectSalting outeng
dc.subjectSolid phase microextractioneng
dc.titleDeterminação dos coeficientes de atividade em diluição infinita de álcoois em água na presença de sais de sódio por microextração em fase sólida associada a cromatografia a gás (HS-SPME-GC/FID)por
dc.title.alternativeDetermination of infinite dilution activity coefficients of alcohols in water in the presence of sodium salts using solid phase microextraction (HS-SPME-GC/FID)eng
dc.typeDissertaçãopor
dc.description.abstractOtherIn general, separation and purification processes account for most of the operational and design costs of industrial facilities. Therefore, the knowledge of physical and transport properties as well as equilibrium properties are fundamental for the design of such process. However, the limited availability of experimental data, particularly due to the complex composition and structure of certain products, experimental data availability rarely meets industries real demands. In this work, solid phase microextraction (SPME), combined with gas chromatography, was used to evaluate the influence of different concentrations of inorganic salts on the infinite dilution activity coefficients of alcohol/water/salt systems at temperatures of 25, 45 and 60 °C. The technique used is fast, inexpensive and easy to implement, which, coupled with the specific equations of the methodology, allowed us to determine the activity coefficient in infinite dilution, evaluating the influence of salt concentration and solution temperature. The alcohols studied were ethanol, propanol and butanol. And the salts studied were, respectively, Sodium Nitrate (NaNO3), Sodium Carbonate (Na2CO3) and Sodium Sulphate (Na2SO4), in concentrations of 0.528, 1.368 and 2.121 mol/kg of water. Among the salts studied, Na2SO4 and Na2CO3 had a better influence on the separation of the studied alcohols at the infinite dilution. The obtained results indicate that the technique used can be considered an alternative method to the determination of infinite dilution activity coefficients.eng
dc.contributor.advisor1Furtado, Filipe Arantes
dc.contributor.advisor1IDhttps://orcid.org/0000-0002-1736-4949por
dc.contributor.advisor1ID120.997.237-96por
dc.contributor.advisor1Latteshttp://lattes.cnpq.br/1582599762724324por
dc.contributor.referee1Furtado, Filipe Arantes
dc.contributor.referee1IDhttps://orcid.org/0000-0002-1736-4949por
dc.contributor.referee1ID120.997.237-96por
dc.contributor.referee1Latteshttp://lattes.cnpq.br/1582599762724324por
dc.contributor.referee2Coelho, Gerson Luiz Vieira
dc.contributor.referee2Latteshttp://lattes.cnpq.br/3629371878927592por
dc.contributor.referee3Ndiaye, Papa Matar
dc.contributor.referee3Latteshttp://lattes.cnpq.br/3720919394286410por
dc.creator.ID32.000.604-2por
dc.creator.ID099.317.996-76por
dc.creator.Latteshttp://lattes.cnpq.br/9228868650608994por
dc.publisher.countryBrasilpor
dc.publisher.departmentInstituto de Tecnologiapor
dc.publisher.initialsUFRRJpor
dc.publisher.programPrograma de Pós-Graduação em Engenharia Químicapor
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dc.subject.cnpqQuímicapor
dc.subject.cnpqEngenharia Químicapor
dc.thumbnail.urlhttps://tede.ufrrj.br/retrieve/68806/2018%20-%20Rayane%20Miranda%20Assis.pdf.jpg*
dc.originais.urihttps://tede.ufrrj.br/jspui/handle/jspui/5533
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