Contribution of the Sedimentation and Coalescence Mechanisms to the Separation of Concentrated Water-in-Oil Emulsions

Frising, T.; Noı̈k, Christine; Dalmazzone, Christine; Peysson, Yannick; Palermo, Thierry

doi:10.1080/01932690701781501

Cited by 26 publications

(17 citation statements)

References 19 publications

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“…Due to the effects of surfactant adsorption, asphaltene/resin interaction, the system droplets can flocculate and form agglomerates. In this sense, the values of k adjusted from the experimental values are not expected to be those predicted by the original Richardson-Zaki correlation, which was obtained from results of sedimentation and fluidization of solid particles (Frising et al, 2008). The values of n in Table 2 are always greater than 2, which suggests that a stronger hinderance effect is produced by the highly concentrated population of water droplets as compared with the relatively smaller effect of increasing sizes (exponent 2 in Equations (1) and (2), for example).…”

Section: Correlation For the Effect Of Water Content On The Settling mentioning

confidence: 99%

Effect of Water Content, Temperature and Average Droplet Size on the Settling Velocity of Water-in-Oil Emulsions

Souza

Santos

Cruz

et al. 2015

Braz. J. Chem. Eng.

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-Water-in-oil (W/O) emulsions are complex mixtures generally found in crude oil production in reservoirs and processing equipment. Sedimentation studies of water-oil emulsions enable the analysis of the fluid dynamic behavior concerning separation of this system composed of two immiscible liquids. Gravitational settling was evaluated in this article for a model emulsion system consisting of water and a Brazilian crude oil diluted in a clear mineral oil as organic phase. The effects of water content and temperature were considered in the study of sedimentation velocity of water-oil emulsions. Water contents between 10% and 50 % and temperatures of 25, 40 and 60 °C were evaluated, and a Richardson-Zaki type correlation was obtained to calculate settling velocities as a function of the process variables investigated. Water contents and average droplet sizes were monitored at different levels in the settling equipment, thus enabling identification of the effect of these variables on the phenomena of sedimentation and coalescence of the emulsions studied. The results showed that the emulsion stability during sedimentation was governed by the emulsion water content, which yielded high settling velocities at low water contents, even when very small droplets were present. A quantitative analysis of the combined effects of drop size and droplet concentration supports the conclusion that a stronger effect is produced by the higher concentration of particles, compared with the relatively smaller effect of increasing the size of the droplets.

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Section: Correlation For the Effect Of Water Content On The Settling mentioning

confidence: 99%

Effect of Water Content, Temperature and Average Droplet Size on the Settling Velocity of Water-in-Oil Emulsions

Souza

Santos

Cruz

et al. 2015

Braz. J. Chem. Eng.

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show abstract

“…Os mecanismos de sedimentação das gotas de uma fase dispersa não são universais, pois os mesmos dependem da características físico-químicas das gotas (FRISING et al, 2008;SOUZA et al, 2015).…”

Section: Modelos De Sedimentaçãounclassified

“…Contudo, quanto maior os separadores, maior o seu custo. Além disso, quando se tratando de separadores offshore, os mesmos também apresentam restrições de tamanho devido as limitações de espaço nas plataformas e da pressão no leito marinho (FRISING et al, 2008;LAVENSON, et al, 2016). Outro ponto é que devido as leis ambientais, cada vez mais rigorosas, o processo de separação deve ser tornar cada vez mais efi ciente (FRISING et al, 2008).…”

Section: Introductionunclassified

Avaliação Do Transporte De Sedimentos: Sedim 2.0

Campeão¹,

Hora²

2019

Engenharias, Ciência E Tecnologia 2

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“…-Methods to study the sedimentation (creaming) and coalescence of an emulsion. The sedimentation rate is generally measured by following the position of the pure oil (in the case of w/o emulsions)/emulsion interface visually [10]. An apparatus like the Turbiscan used in this study can also be used [11].…”

Section: Introductionmentioning

confidence: 99%

Separation profile of model water-in-oil emulsions followed by nuclear magnetic resonance (NMR) measurements: Application range and comparison with a multiple-light scattering based apparatus

Simon

Pierrard

Sjöblom

et al. 2011

Journal of Colloid and Interface Science

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Contribution of the Sedimentation and Coalescence Mechanisms to the Separation of Concentrated Water-in-Oil Emulsions

Cited by 26 publications

References 19 publications

Effect of Water Content, Temperature and Average Droplet Size on the Settling Velocity of Water-in-Oil Emulsions

Effect of Water Content, Temperature and Average Droplet Size on the Settling Velocity of Water-in-Oil Emulsions

Avaliação Do Transporte De Sedimentos: Sedim 2.0

Separation profile of model water-in-oil emulsions followed by nuclear magnetic resonance (NMR) measurements: Application range and comparison with a multiple-light scattering based apparatus

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