Viscosity reduction of water-in-oil emulsion by phase inversion: surfactants performance and characterization
DOI:
https://doi.org/10.21712/lajer.2024.v11.n2.p10-22Palavras-chave:
óleo crú, reologia, transição de fase, estabilidade cinética, Triton-X-100, Tween 80Resumo
A técnica de inversão de fase tem recebido atenção na indústria do petróleo com o objetivo de diminuir o consumo de energia. Emulsões de petróleo bruto preparadas com soluções modelo de salmoura contendo 1,5% em peso de NaCl e 1,0% em peso de surfactantes foram produzidas e avaliadas quanto à condutividade elétrica, estabilidade cinética, microestrutura e reologia. Verificou-se que a inversão de fase ocorreu na faixa de 20-40% em peso de salmoura. Emulsões com 10-40% em peso de salmoura e Triton-X-100 manifestaram menor separação de fases do que sem surfactante ou com Tween 80, enquanto emulsões óleo em água com 50 e 60% em peso de salmoura e Triton-X-100 alcançou o menor valor de viscosidade. Assim, estes resultados elucidam a influência de parâmetros selecionados nas propriedades das emulsões visando melhorar a mobilidade e fluidez por inversão de fase de emulsões água em óleo de alta viscosidade.
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