Avaliação da temperatura de cristalização da parafina em sistemas: parafina, solvente e tensoativo
Autor(a) principal: | |
---|---|
Data de Publicação: | 2005 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFRN |
Texto Completo: | https://repositorio.ufrn.br/jspui/handle/123456789/15766 |
Resumo: | The formation of paraffin deposits is common in the petroleum industry during production, transport and treatment stages. It happens due to modifications in the thermodynamic variables that alter the solubility of alkanes fractions present in petroleum. The deposition of paraffin can provoke significant and growing petroleum losses, arriving to block the flow, hindering to the production. This process is associated with the phases equilibrium L-S and the stages and nucleation, growth and agglomeration the crystals. That process is function of petroleum intrinsic characteristics and temperature and pressure variations, during production. Several preventive and corrective methods are used to control the paraffin crystallization, such as: use of chemical inhibitors, hot solvents injection, use of termochemistry reactions, and mechanical removal. But for offshore exploration this expensive problem needs more investigation. Many studies have been carried through Wax Appearance Temperature (WAT) of paraffin; therefore the formed crystals are responsible for the modification of the reologics properties of the oil, causing a lot off operational problems. From the determination of the WAT of a system it is possible to affirm if oil presents or not trend to the formation of organic deposits, making possible to foresee and to prevent problems of wax crystallization. The solvent n-paraffin has been widely used as fluid of perforation, raising the production costs when it is used in the removal paraffin deposits, needing an operational substitute. This study aims to determine the WAT of paraffin and the interference off additives in its reduction, being developed system paraffin/solvent/surfactant that propitiates the wax solubilization. Crystallization temperatures in varied paraffin concentrations and different solvents were established in the first stage of the experiments. In the second stage, using the methodology of variation of the photoelectric signal had been determined the temperature of crystallization of the systems and evaluated the interferences of additives to reduction of the WAT. The experimental results are expressed in function of the variations of the photoelectric signals during controlled cooling, innovating and validating this new methodology to determine WAT, relatively simple with relation the other applied that involve specific equipments and of high cost. Through the curves you differentiate of the results had been also identified to the critical stages of growth and agglomeration of the crystals that represent to the saturation of the system, indicating difficulties of flow due to the increase of the density |
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Santana, Erika Adriana dehttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4708013U6http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4798645D3Dutra Júnior, Tarcilio Vianahttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4706483T3Dantas Neto, Afonso Avelinohttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4783215D9Moura, Maria Carlenise Paiva de Alencarhttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4702157Y9Ramos, Antonio Carlos da Silvahttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4798645J4Barros Neto, Eduardo Lins de2014-12-17T15:01:17Z2006-08-252014-12-17T15:01:17Z2005-07-21SANTANA, Erika Adriana de. Avaliação da temperatura de cristalização da parafina em sistemas: parafina, solvente e tensoativo. 2005. 125 f. Dissertação (Mestrado em Pesquisa e Desenvolvimento de Tecnologias Regionais) - Universidade Federal do Rio Grande do Norte, Natal, 2005.https://repositorio.ufrn.br/jspui/handle/123456789/15766The formation of paraffin deposits is common in the petroleum industry during production, transport and treatment stages. It happens due to modifications in the thermodynamic variables that alter the solubility of alkanes fractions present in petroleum. The deposition of paraffin can provoke significant and growing petroleum losses, arriving to block the flow, hindering to the production. This process is associated with the phases equilibrium L-S and the stages and nucleation, growth and agglomeration the crystals. That process is function of petroleum intrinsic characteristics and temperature and pressure variations, during production. Several preventive and corrective methods are used to control the paraffin crystallization, such as: use of chemical inhibitors, hot solvents injection, use of termochemistry reactions, and mechanical removal. But for offshore exploration this expensive problem needs more investigation. Many studies have been carried through Wax Appearance Temperature (WAT) of paraffin; therefore the formed crystals are responsible for the modification of the reologics properties of the oil, causing a lot off operational problems. From the determination of the WAT of a system it is possible to affirm if oil presents or not trend to the formation of organic deposits, making possible to foresee and to prevent problems of wax crystallization. The solvent n-paraffin has been widely used as fluid of perforation, raising the production costs when it is used in the removal paraffin deposits, needing an operational substitute. This study aims to determine the WAT of paraffin and the interference off additives in its reduction, being developed system paraffin/solvent/surfactant that propitiates the wax solubilization. Crystallization temperatures in varied paraffin concentrations and different solvents were established in the first stage of the experiments. In the second stage, using the methodology of variation of the photoelectric signal had been determined the temperature of crystallization of the systems and evaluated the interferences of additives to reduction of the WAT. The experimental results are expressed in function of the variations of the photoelectric signals during controlled cooling, innovating and validating this new methodology to determine WAT, relatively simple with relation the other applied that involve specific equipments and of high cost. Through the curves you differentiate of the results had been also identified to the critical stages of growth and agglomeration of the crystals that represent to the saturation of the system, indicating difficulties of flow due to the increase of the densityA formação de depósito parafínico é comum na indústria do petróleo durante as etapas de produção, movimentação e tratamento e ocorre em decorrência de modificações nas variáveis termodinâmicas que alteram a solubilidade das frações de alcanos presentes no petróleo. A cristalização de parafinas pode provocar significativas e crescentes perdas de petróleo, chegando a bloquear o fluxo, impedindo à produção. Esse processo está associado ao equilíbrio de fases L-S e as etapas de nucleação, crescimento e aglomeração dos cristais. Existem vários métodos preventivos e corretivos para controlar a cristalização de parafinas, dentre os quais se destacam: o uso de inibidores químicos, a injeção de solventes aquecidos, o emprego de reações termoquímicas e a remoção mecânica, porém quanto à exploração offshore pouco se conhece, tornando-se indispensável investigar este custoso problema. Muitos estudos têm sido realizados quanto à temperatura de início do aparecimento dos cristais (TIAC) da parafina, pois os cristais formados são responsáveis pela modificação das propriedades reológicas do petróleo, causando diversos problemas operacionais. A partir da determinação da TIAC de um sistema é possível afirmar se um petróleo apresenta ou não tendência à formação de depósitos orgânicos, possibilitando prever e evitar problemas de cristalização parafínica. O solvente n-parafina tem sido amplamente utilizado como fluido de perfuração, elevando os custos de produção quando é empregado na remoção de depósitos parafínicos, necessitando de um substituto operacional. Este estudo visa determinar a TIAC da parafina e à interferência de aditivos na sua redução, desenvolvendo um sistema parafina/solvente/tensoativo que propicie a solubilização parafínica. Na primeira etapa dos experimentos, foram determinadas as temperaturas de cristalização em concentrações de parafina variadas e diferentes solventes. Na segunda etapa, utilizando a metodologia de variação do sinal fotoelétrico foi determinada a temperatura de cristalização dos sistemas e avaliadas as interferências dos aditivos quanto à redução da TIAC. Os resultados são expressos em função das variações do sinal fotoelétrico, durante resfriamento controlado, inovando e validando esta metodologia de determinação da TIAC, relativamente simples com relação às outras aplicadas que envolvem equipamentos específicos e de alto custo. Através das curvas diferencias dos resultados também foram identificadas às etapas críticas de crescimento e aglomeração dos cristais que representam à saturação do sistema, indicando dificuldades de fluxo devido ao aumento da densidadeapplication/pdfporUniversidade Federal do Rio Grande do NortePrograma de Pós-Graduação em Engenharia QuímicaUFRNBRPesquisa e Desenvolvimento de Tecnologias RegionaisParafinaCristalizaçãoTensoativoTemperaturaSolventesMicroemulsõesParaffinCrystallizationSurfactantsTemperatureSolventsCNPQ::ENGENHARIAS::ENGENHARIA QUIMICAAvaliação da temperatura de cristalização da parafina em sistemas: parafina, solvente e tensoativoinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisinfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRNinstname:Universidade Federal do Rio Grande do Norte (UFRN)instacron:UFRNORIGINALErikaaAS.pdfapplication/pdf744693https://repositorio.ufrn.br/bitstream/123456789/15766/1/ErikaaAS.pdf969bbaf028a15425563a34bdced20b1eMD51TEXTErikaaAS.pdf.txtErikaaAS.pdf.txtExtracted texttext/plain248505https://repositorio.ufrn.br/bitstream/123456789/15766/6/ErikaaAS.pdf.txt11d3af3ea0ed6cc33b8192f5cd6b11b5MD56THUMBNAILErikaaAS.pdf.jpgErikaaAS.pdf.jpgIM Thumbnailimage/jpeg4973https://repositorio.ufrn.br/bitstream/123456789/15766/7/ErikaaAS.pdf.jpgb88a27a804ccf746da35dac737ef2811MD57123456789/157662017-11-02 03:04:06.13oai:https://repositorio.ufrn.br:123456789/15766Repositório de PublicaçõesPUBhttp://repositorio.ufrn.br/oai/opendoar:2017-11-02T06:04:06Repositório Institucional da UFRN - Universidade Federal do Rio Grande do Norte (UFRN)false |
dc.title.por.fl_str_mv |
Avaliação da temperatura de cristalização da parafina em sistemas: parafina, solvente e tensoativo |
title |
Avaliação da temperatura de cristalização da parafina em sistemas: parafina, solvente e tensoativo |
spellingShingle |
Avaliação da temperatura de cristalização da parafina em sistemas: parafina, solvente e tensoativo Santana, Erika Adriana de Parafina Cristalização Tensoativo Temperatura Solventes Microemulsões Paraffin Crystallization Surfactants Temperature Solvents CNPQ::ENGENHARIAS::ENGENHARIA QUIMICA |
title_short |
Avaliação da temperatura de cristalização da parafina em sistemas: parafina, solvente e tensoativo |
title_full |
Avaliação da temperatura de cristalização da parafina em sistemas: parafina, solvente e tensoativo |
title_fullStr |
Avaliação da temperatura de cristalização da parafina em sistemas: parafina, solvente e tensoativo |
title_full_unstemmed |
Avaliação da temperatura de cristalização da parafina em sistemas: parafina, solvente e tensoativo |
title_sort |
Avaliação da temperatura de cristalização da parafina em sistemas: parafina, solvente e tensoativo |
author |
Santana, Erika Adriana de |
author_facet |
Santana, Erika Adriana de |
author_role |
author |
dc.contributor.authorID.por.fl_str_mv |
|
dc.contributor.authorLattes.por.fl_str_mv |
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4708013U6 |
dc.contributor.advisorID.por.fl_str_mv |
|
dc.contributor.advisorLattes.por.fl_str_mv |
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4798645D3 |
dc.contributor.advisor-co1ID.por.fl_str_mv |
|
dc.contributor.referees1.pt_BR.fl_str_mv |
Dantas Neto, Afonso Avelino |
dc.contributor.referees1ID.por.fl_str_mv |
|
dc.contributor.referees1Lattes.por.fl_str_mv |
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4783215D9 |
dc.contributor.referees2.pt_BR.fl_str_mv |
Moura, Maria Carlenise Paiva de Alencar |
dc.contributor.referees2ID.por.fl_str_mv |
|
dc.contributor.referees2Lattes.por.fl_str_mv |
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4702157Y9 |
dc.contributor.referees3.pt_BR.fl_str_mv |
Ramos, Antonio Carlos da Silva |
dc.contributor.referees3ID.por.fl_str_mv |
|
dc.contributor.referees3Lattes.por.fl_str_mv |
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4798645J4 |
dc.contributor.author.fl_str_mv |
Santana, Erika Adriana de |
dc.contributor.advisor-co1.fl_str_mv |
Dutra Júnior, Tarcilio Viana |
dc.contributor.advisor-co1Lattes.fl_str_mv |
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4706483T3 |
dc.contributor.advisor1.fl_str_mv |
Barros Neto, Eduardo Lins de |
contributor_str_mv |
Dutra Júnior, Tarcilio Viana Barros Neto, Eduardo Lins de |
dc.subject.por.fl_str_mv |
Parafina Cristalização Tensoativo Temperatura Solventes Microemulsões |
topic |
Parafina Cristalização Tensoativo Temperatura Solventes Microemulsões Paraffin Crystallization Surfactants Temperature Solvents CNPQ::ENGENHARIAS::ENGENHARIA QUIMICA |
dc.subject.eng.fl_str_mv |
Paraffin Crystallization Surfactants Temperature Solvents |
dc.subject.cnpq.fl_str_mv |
CNPQ::ENGENHARIAS::ENGENHARIA QUIMICA |
description |
The formation of paraffin deposits is common in the petroleum industry during production, transport and treatment stages. It happens due to modifications in the thermodynamic variables that alter the solubility of alkanes fractions present in petroleum. The deposition of paraffin can provoke significant and growing petroleum losses, arriving to block the flow, hindering to the production. This process is associated with the phases equilibrium L-S and the stages and nucleation, growth and agglomeration the crystals. That process is function of petroleum intrinsic characteristics and temperature and pressure variations, during production. Several preventive and corrective methods are used to control the paraffin crystallization, such as: use of chemical inhibitors, hot solvents injection, use of termochemistry reactions, and mechanical removal. But for offshore exploration this expensive problem needs more investigation. Many studies have been carried through Wax Appearance Temperature (WAT) of paraffin; therefore the formed crystals are responsible for the modification of the reologics properties of the oil, causing a lot off operational problems. From the determination of the WAT of a system it is possible to affirm if oil presents or not trend to the formation of organic deposits, making possible to foresee and to prevent problems of wax crystallization. The solvent n-paraffin has been widely used as fluid of perforation, raising the production costs when it is used in the removal paraffin deposits, needing an operational substitute. This study aims to determine the WAT of paraffin and the interference off additives in its reduction, being developed system paraffin/solvent/surfactant that propitiates the wax solubilization. Crystallization temperatures in varied paraffin concentrations and different solvents were established in the first stage of the experiments. In the second stage, using the methodology of variation of the photoelectric signal had been determined the temperature of crystallization of the systems and evaluated the interferences of additives to reduction of the WAT. The experimental results are expressed in function of the variations of the photoelectric signals during controlled cooling, innovating and validating this new methodology to determine WAT, relatively simple with relation the other applied that involve specific equipments and of high cost. Through the curves you differentiate of the results had been also identified to the critical stages of growth and agglomeration of the crystals that represent to the saturation of the system, indicating difficulties of flow due to the increase of the density |
publishDate |
2005 |
dc.date.issued.fl_str_mv |
2005-07-21 |
dc.date.available.fl_str_mv |
2006-08-25 2014-12-17T15:01:17Z |
dc.date.accessioned.fl_str_mv |
2014-12-17T15:01:17Z |
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info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
format |
masterThesis |
status_str |
publishedVersion |
dc.identifier.citation.fl_str_mv |
SANTANA, Erika Adriana de. Avaliação da temperatura de cristalização da parafina em sistemas: parafina, solvente e tensoativo. 2005. 125 f. Dissertação (Mestrado em Pesquisa e Desenvolvimento de Tecnologias Regionais) - Universidade Federal do Rio Grande do Norte, Natal, 2005. |
dc.identifier.uri.fl_str_mv |
https://repositorio.ufrn.br/jspui/handle/123456789/15766 |
identifier_str_mv |
SANTANA, Erika Adriana de. Avaliação da temperatura de cristalização da parafina em sistemas: parafina, solvente e tensoativo. 2005. 125 f. Dissertação (Mestrado em Pesquisa e Desenvolvimento de Tecnologias Regionais) - Universidade Federal do Rio Grande do Norte, Natal, 2005. |
url |
https://repositorio.ufrn.br/jspui/handle/123456789/15766 |
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por |
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por |
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info:eu-repo/semantics/openAccess |
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openAccess |
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Universidade Federal do Rio Grande do Norte |
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Programa de Pós-Graduação em Engenharia Química |
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UFRN |
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BR |
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Pesquisa e Desenvolvimento de Tecnologias Regionais |
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Universidade Federal do Rio Grande do Norte |
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