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Previous issue date: 2017-02-17 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico (CNPq) / O presente trabalho teve como objetivo fazer a caracteriza??o anal?tica de propriedades termodin?micas de amostras de petr?leo, afim de se desenvolver uma metodologia computacional com o intuito de determinar a composi??o e as propriedades cr?ticas dos pseudo-componentes presentes nas fra??es das amostras analisadas, que foram denominadas de condensado de g?s (CG) e fra??o de petr?leo leve (FPL). A massa espec?fica foi mensurada utilizando picnometria. Para tanto foi utilizado uma manta termost?tica para o aquecimento e um term?metro para o acompanhamento da temperatura. As fra??es destiladas foram recolhidas ap?s passarem por um condensador (20 ?C), sendo registrado a temperatura de ebuli??o e a massa espec?fica tamb?m por picnometria. Com isso, foi poss?vel calcular a massa molecular utilizando a correla??o de Riazi-Daubert, bem como a temperatura e a press?o cr?tica usando as correla??es de Lee-Kesler e o fator ac?ntrico a partir da correla??o de Edmister, de cada pseudo-componente. Para a valida??o da caracteriza??o, foram realizados experimentos de press?o de bolha com a amostra em uma c?lula de equil?brio na qual ? poss?vel aplicar o m?todo visual e da c?mara de expans?o, em condi??es espec?ficas de concentra??o molar (20 ? 60 % de amostra) e temperatura (30 ? 120 ?C). Os resultados obtidos foram comparados com os simulados pelo software SPECS v5.63. Para os sistemas envolvendo CO2-CG os erros calculados foram, em m?dia, de 4,5, 4,8 e 3,7 %, respectivamente para as equa??es de estado SRK, PR e ALS, enquanto que para os sistemas CO2-FPL esses valores foram, em m?dia, de 7,5, 4,6 e 2,6 %, respectivamente para as mesmas equa??es de estado. Podemos concluir, que os objetivos atingidos foram alcan?ados e a metodologia empregada teve um desempenho satisfat?rio para descrever a amostra estudada, podendo ser aplicada a diferentes amostras de petr?leo para fins de caracteriza??o / The aim of this work was to analyze the thermodynamic properties of petroleum samples in order to develop a computational methodology to determine the composition and critical properties of the pseudo-components present in the fractions of the analyzed samples. of gas condensate (CG) and light petroleum fraction (FPL). The density was measured using pycnometry. For this purpose, a thermostatic heating mantle and a thermometer were used to monitor the temperature. The distilled fractions were collected after passing through a condenser (20 ?C), the boiling temperature and density being also recorded by pycnometry. Thus, it was possible to calculate the molecular mass using the Riazi-Daubert correlation as well as the temperature and critical pressure using the Lee-Kesler correlations and the acentric factor from the Edmister correlation of each pseudo-component. For the validation of the characterization, bubble pressure experiments were performed with the sample in an equilibrium cell in which it is possible to apply the visual method and the expansion chamber, under specific conditions of molar concentration (20 ? 60 % of sample) and temperature (30 - 120 ?C). The results obtained were compared with those simulated by SPECS v5.63 software. For the systems involving CO2-CG, the calculated errors averaged were 4,5, 4,8 and 3,7 %, respectively for SRK, PR and ALS equations, while for CO2- FPL values were, on average, 7,5, 4,6 and 2,6 %, respectively, for the same state equations. It can be concluded that the present work had the objectives reached and that the methodology used had a satisfactory performance to describe the studied sample, being able to be applied to different petroleum samples for characterization purposes
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/23397 |
| Date | 17 February 2017 |
| Creators | Barbalho, Thales Cain? dos Santos |
| Contributors | 08580772800, http://lattes.cnpq.br/2621516646153655, Oliveira, Humberto Neves Maia de, 22179763468, http://lattes.cnpq.br/7302633941782540, Ara?jo, Alessandro Alisson de Lemos, 01322289476, http://lattes.cnpq.br/6204950349091367, Foletto, Edson Luiz, 54536839020, http://lattes.cnpq.br/6550340290019699, Chiavone Filho, Osvaldo |
| Publisher | PROGRAMA DE P?S-GRADUA??O EM ENGENHARIA QU?MICA, UFRN, Brasil |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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