v. 21 n. 2 (2023): Fuentes, el reventón energético
Artigos

AVALIAÇÃO DE UMA UNIDADE HPHT ACOPLADA COM SONDA NIR PARA DETERMINAR O INÍCIO DA PRECIPITAÇÃO DE ASFALTENO SOB DIFERENTES PRESSÕES DIFERENTES PRESSÕES

Daniel Rezende da Silva
Universidade Federal do Rio de Janeiro, Instituto de Macromoléculas/LMCP, Rua Moniz Aragão, 360, bloco 8G/CT2, 21941-594, Rio de Janeiro, RJ, Brazil.
João Pedro Dias Capuchinho
Universidade Federal do Rio de Janeiro, Instituto de Macromoléculas/LMCP, Rua Moniz Aragão, 360, bloco 8G/CT2, 21941-594, Rio de Janeiro, RJ, Brazil.
Edilson Domingos da Silva
Universidade Federal do Rio de Janeiro, Instituto de Macromoléculas/LMCP, Rua Moniz Aragão, 360, bloco 8G/CT2, 21941-594, Rio de Janeiro, RJ, Brazil.
Daniela Hartmann
Universidade Federal do Rio de Janeiro, Programa de Engenharia Metalúrgica e de Materiais/COPPE/ LADPOL, Av. Horácio Macedo, 2030, bloco F, 21941-598, Rio de Janeiro, RJ, Brazil.
Marcia Cristina Khalil de Oliveira
Centro de Pesquisas da Petrobras, Av. Horácio Macedo, 950, 21941-915, Rio de Janeiro, RJ, Brazil.
Elizabete Fernandes Lucas
Universidade Federal do Rio de Janeiro, Programa de Engenharia Metalúrgica e de Materiais/COPPE/ LADPOL, Av. Horácio Macedo, 2030, bloco F, 21941-598, Rio de Janeiro, RJ, Brazil.

Publicado 2023-09-26

Como Citar

da Silva, D. R., Dias Capuchinho, J. P., da Silva, E. D., Hartmann, D., Khalil de Oliveira, M. C., & Fernandes Lucas, E. (2023). AVALIAÇÃO DE UMA UNIDADE HPHT ACOPLADA COM SONDA NIR PARA DETERMINAR O INÍCIO DA PRECIPITAÇÃO DE ASFALTENO SOB DIFERENTES PRESSÕES DIFERENTES PRESSÕES. REVISTA FUENTES, 21(2), 45–60. https://doi.org/10.18273/revfue.v21n2-2023004

Resumo

Os asfaltenos são caracterizados como a fração de petróleo bruto com a maior massa molar e polaridade, pré-definindo principalmente grupos (poli)aromáticos. A floculação e a deposição de asfaltenos causam grandes perdas à indústria petrolífera. indústria. É importante compreender o comportamento de fase dos asfaltenos em condições mais próximas das encontradas no reservatório. Assim, o LMCP/UFRJ passou a operar uma unidade de alta pressão e alta temperatura (HPHT) acoplada a uma sonda de espetrometria de infravermelho próximo que pode utilizar diferentes floculantes. Este trabalho descreve o desenvolvimento de um procedimento, bem como a validação dos resultados obtidos com esta unidade. Devido à composição complexa do petróleo bruto, foram preparados sistemas modelo (MS) com asfaltenos extraídos com n-pentano (C5I) e n-heptano (C7I). (C7I). As experiências foram efectuadas à pressão atmosférica, tituladas com n-heptano, e a 100 e 300 bar, tituladas com propano. Como era de esperar, os asfaltenos C7I eram mais instáveis, apresentando um início de precipitação inferior ao dos asfaltenos C5I em condições ambientes e a pressões mais elevadas. No entanto, para ambos os EM a estabilidade aumenta com o aumento da pressão. O método proposto para avaliar o início da precipitação de asfaltenos foi eficaz para os SM em tolueno e em petróleo bruto morto e é uma alternativa promissora para a investigação de diferentes tipos de petróleo bruto.

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