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dc.creatorBessa, Matheus Vidal-
dc.creator.Latteshttp://lattes.cnpq.br/4691969403037874por
dc.contributor.advisor1Mendes, Marisa Fernandes-
dc.contributor.advisor1Latteshttp://lattes.cnpq.br/3233683706295801por
dc.contributor.advisor-co1Catunda Junior, Francisco Eduardo Aragão-
dc.contributor.referee1Mendes, Marisa Fernandes-
dc.contributor.referee2Castelo Branco, Vanessa Naciuk-
dc.contributor.referee3Suzart, Luciano Ramos-
dc.date.accessioned2021-08-14T23:57:49Z-
dc.date.issued2018-08-15-
dc.identifier.citationBESSA, Matheus Vidal. Avaliação da composição do óleo da semente da seringueira (Hevea brasiliensis): Extração com CO2 supercrítico e modelagem matemática. 2018. 73 f. Dissertação (Mestrado em Engenharia Química) - Instituto de Tecnologia, Universidade Federal Rural do Rio de Janeiro, Seropédica - RJ, 2018.por
dc.identifier.urihttps://tede.ufrrj.br/jspui/handle/jspui/4919-
dc.description.resumoA seringueira é uma árvore proveniente da Bacia Amazônica, conhecida por conta da extração do látex. Esse produto é o principal interesse comercial da planta, sendo os subprodutos da extração do látex, como a madeira e a semente da árvore, desperdiçados na maioria das vezes. No entanto, a semente apresenta um óleo que contém diversas características e substâncias (ácidos linoleico e a-linolênico) que o tornam próprio para uso em indústrias alimentícia, farmacêutica, cosmética e de resinas de tintas. Com isso, diferentes métodos de extração desse óleo da semente da seringueira têm sido utilizados, como Soxhlet, prensagem a frio, maceração, entre outros. Outra técnica, que tem despontado como alternativa é a extração usando CO2 supercrítico. Neste estado, o fluido passa a ter um grande poder de solvatação e capaz de ser seletivo na extração de determinados compostos. Desse modo, o objetivo desse trabalho foi extrair o óleo da semente da seringueira, utilizando o CO2 como fluido supercrítico, em diferentes condições de temperatura (40 – 80 oC) e pressão (200 – 500 bar), avaliando a composição do extrato, prevendo a solubilidade do mesmo, e realizando a modelagem matemática da cinética do processo. Os experimentos foram conduzidos, adicionando 10 g de semente moída e seca a um extrator, conectado a uma bomba de alta pressão e a um banho termostatizado. Por despressurização, o óleo foi coletado com o uso de uma válvula micrométrica. A partir de um planejamento de experimentos, a condição que forneceu o maior rendimento (1,06%) foi a 500 bar e 60 oC. A partir da análise cromatográfica dos extratos, identificou-se a presença dos ácidos linoleico e linolênico, com a maior seletividade para a extração de cada um sendo, respectivamente, nas condições a 500 bar – 60 ºC e 456 bar – 46 ºC. Além dos ácidos, o esqualeno também foi identificado na grande maioria dos óleos extraídos por fluido supercrítico, sendo a maior seletividade para a extração a 244 bar – 46 ºC. Quanto aos modelos cinéticos, o modelo de Sovová (1994) apresentou o melhor ajuste, representando a curva de extração, com um desvio relativo médio menor que 10%. Para os modelos de solubilidade, apenas o modelo de Gordillo et al. (1999) obteve o mesmo comportamento experimental, com desvio relativo de 1,23%.por
dc.description.abstractThe rubber tree is a tree from the Amazon Basin, known for its latex extraction. This product is the main commercial interest of the plant, and the by-products of latex extraction, such as wood and tree seed, are usually wasted. However, the seeds present an oil that contains several characteristics and compounds (linoleic and a-linolenic acids) that makes it ideal for food, pharmaceutical, cosmetic and resin industries. Different methods have been studied for oil extraction, including rubber seed oil, such as Soxhlet, cold pressing, maceration and others. Another technique, supercritical fluid extraction, has been studied as an alternative one for oil extraction. This is due to the great solvation power of the solvent, being selective for the extraction of certain compounds. Thus, the objective of this work was to extract the rubber tree oil using supercritical fluid under different conditions of temperature and pressure, performing a modeling of the kinetics and solubility of these extractions. The experiments were done adding 10 g of ground and dried rubber seed to a 42 mL extractor, coupled to a CO2 line, which contains a high pressure pump and a CO2 cylinder, and a thermostated bath. The sampling occurred by depressuring through a micrometer valve. The pressures (200-500 bar) and temperatures (40-80 °C) of the experiments were defined by an experimental design. The experimental condition with the highest yield (1.06%) was at 500 bar and 60 °C. From the chromatographic analysis of the extracts, the presence of linoleic and linolenic acids was identified, with the highest selectivity, respectively, in the conditions at 500 bar - 60 ºC and 456 bar - 46 ºC. Another important component, squalene was also identified in most of the oils extracted by supercritical fluid, with the highest selectivity at 244 bar - 46 ºC. Among the kinetics model, the Sovová model (1994) presented the best fit, representing the extraction curves, with a mean relative deviation lower than 10%. Only the solubility model of Gordillo et al. (1999) had the same experimental behavior, with a relative deviation of 1.23%.eng
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dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior, CAPES, Brasil.por
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dc.languageporpor
dc.publisherUniversidade Federal Rural do Rio de Janeiropor
dc.publisher.departmentInstituto de Tecnologiapor
dc.publisher.countryBrasilpor
dc.publisher.initialsUFRRJpor
dc.publisher.programPrograma de Pós-Graduação em Engenharia Químicapor
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YOUSIF, E.; ABDULLAH, B.; IBRAHEEM, H.; SALIMON, J.; SALIH, N. Rubber Seed Oil Properties, Authentication and Quality Assessment Using (Chloroform: Methanol) as Solvent. Journal of Al-Nahrain University Science, v. 16, n. 1, p. 1–6, 2013.por
dc.rightsAcesso Abertopor
dc.subjectseringueirapor
dc.subjectsolubilidadepor
dc.subjectácidos graxospor
dc.subjectrubber treeeng
dc.subjectsolubilityeng
dc.subjectfatty acidseng
dc.subject.cnpqEngenharia Químicapor
dc.titleAvaliação da composição do óleo da semente da seringueira (Hevea brasiliensis): Extração com CO2 supercrítico e modelagem matemáticapor
dc.title.alternativeEvaluation of the composition of the rubber (Hevea brasiliensis) seed oil: extraction with supercritical CO2 and mathematical modeling.eng
dc.typeDissertaçãopor
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