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Previous issue date: 2013-06-25 / In this research the removal of light and heavy oil from disintegrated limestone was
investigated with use of microemulsions. These chemical systems were composed by surfactant,
cosurfactant, oil phase and aqueous phase. In the studied systems, three points in the water -rich
microemulsion region of the phase diagrams were used in oil removal experiments. These
microemulsion systems were characterized to evaluate the influence of particle size, surface
tension, density and viscosity in micellar stability and to understand how the physical properties
can influence the oil recovery process. The limestone rock sample was characterized by
thermogravimetry, BET area, scanning electron microscopy and X-ray fluorescence. After
preparation, the rock was placed in contact with light and heavy oil solutions to allow oil
adsorption. The removal tests were performed to evaluate the influence of contact time (1 minute,
30 minutes, 60 minutes and 120 minutes), the concentration of active matter (20, 30 and 40 %),
different cosurfactants and different oil phases. For the heavy oil, the best result was on SME 1,
with 20 % of active matter, 1 minute of contact time, with efficiency of 93,33 %. For the light oil,
also the SME 1, with 20 % of active matter, 120 minutes of contact time, with 62,38 % of
efficiency. From the obtained results, it was possible to conclude that microemulsions can be
considered as efficient chemical systems for oil removal from limestone formations / O presente trabalho objetivou estudar a remo??o de fra??es de ?leo leve e pesado em
rocha calc?ria desintegrada atrav?s de sistemas microemulsionados, comparando as efici?ncias de
remo??o em diferentes concentra??es de mat?ria ativa (C/T) e tempo de contato. Os sistemas
microemulsionados (SME) s?o constitu?dos por tensoativo, cotensoativo, fase oleosa e fase
aquosa. Nos sistemas estudados, tr?s pontos ricos em ?gua da regi?o de microemuls?o foram
utilizados para verificar a efici?ncia de remo??o. Os sistemas foram caracterizados para avaliar a
influ?ncia do tamanho do agregado, tens?o superficial e viscosidade na estabilidade micelar e
compreender como as propriedades f?sicas podem influenciar o processo de remo??o de ?leo. A
amostra de rocha calc?ria foi caracterizada por Termogravimetria, ?rea BET, Microscopia
Eletr?nica de Varredura, Difra??o de Raios-X e Fluoresc?ncia de Raios-X. A rocha preparada foi
colocada em contato com solu??o de ?leo leve e pesado em xileno para permitir a adsor??o de
?leo. Os testes de remo??o foram realizados a fim de avaliar a influ?ncia do tempo de contato (1,
30, 60 e 120 minutos), da concentra??o de mat?ria ativa (20, 30 e 40%), do cotensoativo e da fase
oleosa. Para o ?leo pesado, o melhor resultado foi para o SME 1, com 20 % de mat?ria ativa, no
tempo de 1 minuto, com 93,33 % de efici?ncia. Para o ?leo leve, o SME 1 no percentual de 20 %,
com 120 minutos apresentou o melhor rendimento, com 62,38 %. A partir dos resultados obtidos,
concluiu-se que os sistemas microemulsionados apresentam-se como uma alternativa eficaz para
remo??o de ?leo em forma??es calc?rias
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/17719 |
| Date | 25 June 2013 |
| Creators | Santos, Giliane Cristina Medeiros do Nascimento |
| Contributors | CPF:07286937391, http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4783139Z0&dataRevisao=null, Gurgel, Alexandre, CPF:59721421472, http://lattes.cnpq.br/5266735277153768, Rossi, C?tia Guaraciara Fernandes Teixeira, CPF:77044568491, http://lattes.cnpq.br/0103853142184734, Silva, Djalma Ribeiro da, CPF:13893734449, http://lattes.cnpq.br/2791074318745945, Dantas, Tereza Neuma de Castro |
| Publisher | Universidade Federal do Rio Grande do Norte, Programa de P?s-Gradua??o em Qu?mica, UFRN, BR, F?sico-Qu?mica; Qu?mica |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Format | application/pdf |
| 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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