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Evaluation of oil-in-water emulsions with non-ionic and anionic surfactants mixtures for potential use in the oil industry Evaluación de emulsiones de crudo en agua con mezclas de surfactantes no-iónicos y aniónicos de uso potencial en la industria petrolera

By Nacarid Delgado, Fredy Ysambertt, Carla Montiel, Gerson Chávez, Ana Cáceres, Bélgica Bravo and Nelson Márquez

Abstract

In the present work, formulations to emulsify heavy crude oil in water, at crude oil/water relationship of 70/30, were evaluated. Non-ionic and anionic surfactants were used with amines of short chain as co-surfactants. Stability, viscosity, conductivity, drop size and size distribution, were evaluated. Stable emulsions were obtained with simple and multiple systems which smaller viscosities than the original crude oil, all them with external phases of water and “extended inversion zone”. The minimum drop size obtained was of 23 µm, with polydisperses distributions, unimodals and bimodals. It was concluded that non-ionic and anionic surfactants mixtures originate a positive synergy, increasing the stability of the crude oil emulsions, and as well as that short chain amines are excellent co-surfactants, because they stabilize micelles formed inside the surfactant-water-crude oil system<br>En el presente trabajo se evaluaron formulaciones para emulsionar crudo pesado en agua, a una relación crudo/agua 70/30. Se utilizaron surfactantes no-iónicos y aniónicos, mientras que aminas de cadena corta se emplearon como co-surfactantes. Se evaluaron la estabilidad, la viscosidad, la conductividad, el tamaño promedio de gota y la distribución de tamaño promedio de gota. Se obtuvieron emulsiones estables para sistemas simples y múltiples, cuyas viscosidades son considerablemente menores a la viscosidad original del crudo, todas de fase externa agua y con una amplia zona de inversión. El tamaño mínimo promedio de gota obtenido fue de 23 mm, con distribuciones polidispersas, tanto unimodales como bimodales. Se concluyó que las mezclas de surfactantes no-iónicos y aniónicos originan una sinergia positiva incrementando la estabilidad de las emulsiones de crudo en agua, y que las aminas de cadena corta son excelentes co-surfactantes, ya que estabilizan las micelas formadas dentro del sistema surfactante-agua-crud

Topics: Emulsión, surfactante, estabilidad, viscosidad, co-surfactante, Emulsion, surfactant, stability, viscosity, co-surfactant, LCC:Engineering (General). Civil engineering (General), LCC:TA1-2040, LCC:Technology, LCC:T, DOAJ:General and Civil Engineering, DOAJ:Technology and Engineering
Publisher: Facultad de Ingeniería, Universidad del Zulia
Year: 2007
OAI identifier: oai:doaj.org/article:035002532a114982a8ea0300aca45cca
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