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Previous issue date: 2017-06-30 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / A ?gua produzida ? o maior volume de descarte de l?quidos gerados durante a produ??o e processamento de petr?leo e g?s natural e, a sua composi??o pode conter v?rios compostos t?xicos naturais, dentre eles t?m-se os hidrocarbonetos polic?clicos arom?ticos (HPA), cuja presen?a causa efeitos nocivos ao meio ambiente. O presente trabalho realizou um estudo sobre a remo??o de 15 HPA em ?gua produzida utilizando sistema microemulsionado. Para isso, foi desenvolvido um diagrama de fases pseudotern?rio constitu?do por ?gua produzida enriquecida com HPA, como fase aquosa (FA), n-hexano como fase oleosa (FO) e n-butanol e CTAB como cotensoativo (C) e tensoativo (T), respectivamente, a uma raz?o C/T = 4. A partir da constru??o do diagrama foi escolhido um ponto com uma alta porcentagem de FA para testar o tratamento, na regi?o de interesse, Winsor II (WII). Esse ponto (90% FA, 5% FO e 5% C/T) foi avaliado de duas maneiras: utilizando um precursor da forma??o de microemuls?o, utilizando como FA a ?gua produzida obtida e a mat?ria ativa (C/T) para a obten??o da microemuls?o formada nesse ponto, e a pr?pria microemuls?o obtida nesse ponto. A avalia??o qualitativa, realizada por meio de espectroscopia de fluoresc?ncia, mostrou que houve tratamento da ?gua produzida para ambos os m?todos, por?m, a avalia??o quantitativa, realizada por meio de cromatografia l?quida de alta efici?ncia com detector de fluoresc?ncia (HPLC-FLD), mostrou que a extra??o utilizando a microemuls?o foi mais eficiente. Com isso, foi realizado um planejamento experimental simplex centr?ide para que o estudo da influ?ncia das fases fosse mensurado e, assim, fosse poss?vel identificar o ponto ?timo de extra??o. As amostras foram analisadas por HPLC-FLD e seus resultados mostraram que cada HPA apresentou uma superf?cie de resposta diferente, por?m todos apresentaram um m?ximo de extra??o no ponto de microemuls?o com a composi??o 90% FA, 5% FO e 5% C/T. Esse resultado mostra que essa t?cnica ? promissora para o tratamento da ?gua produzida na remo??o de HPA, constituindo-se em uma alternativa para o tratamento desse rejeito. / Produced water is the largest volume of disposal fluids generated during the production and processing of petroleum and natural gas and its composition can contain several toxic compounds, among them are the polycyclic aromatic hydrocarbons (PAH), whose presence causes harmful effects to the environment. This paper discusses a study on the removal of 15 PAH in produced water using a microemulsion system. For this, it was developed a pseudo-ternary phase diagram consisting of produced water enriched with PAH, as the aqueous phase (AP), n-hexane as oily phase (OP) and n-butanol and CTAB as cosurfactant (C) and surfactant (T), respectively, to a right C/T = 4. From the diagram's construction was chosen a spot with a high percentage of AP to test the treatment in the region of interest, Winsor II (WII). This spot (90% AP, 5%C/T and 5% OP) was evaluated in two ways: using a precursor of microemulsion formation only with the AP and the active matter and microemulsion formed at that point, by adding the OP. The qualitative assessment, carried out by means of fluorescence spectroscopy, showed that there was water treatment for both methods, however, the quantitative assessment, carried out by means of high performance liquid chromatography with fluorescence detector (HPLC-FLD), showed that extraction using microemulsion was more efficient. With that, it was performed an simplex centroid experimental planning for the study of the influence of the phases and, thus, it was possible to identify the best point of extraction. The samples were analyzed by HPLC-FLD and its results showed that each PAH presented a different response surface, but all of them showed a maximum extraction at the point with microemulsion composition of 90% AP, 5% C/T and 5% OP. This result shows that this technique is promising for the treatment of produced water in removing HPA, constituting an alternative to the treatment of this reject.
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/23879 |
| Date | 30 June 2017 |
| Creators | Menezes, Yasmin Maria da Silva |
| Contributors | 13893734449, Costa, Emily Cintia Tossi de Ara?jo, 01282478435, Cunha, Jardel Dantas da, 01063473497, Dantas, Tereza Neuma de Castro, 07286937391, Silva, Djalma Ribeiro da |
| Publisher | PROGRAMA DE P?S-GRADUA??O EM CI?NCIA E ENGENHARIA DE PETR?LEO, 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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