Study of the stability and homogeneity of water in oil emulsions of heavy oil

Silva, Mayara da; Sad, Cristina M. S.; Pereira, Laíne B.; Corona, Rayane R.B.; Bassane, João F. P.; Santos, Francine D.; Neto, Dorval M.C.; Silva, Samantha R.C.; Castro, Eustáquio Vinícius Ribeiro de; Filgueiras, Paulo R.

doi:10.1016/j.fuel.2018.04.011

Cited by 59 publications

(21 citation statements)

References 35 publications

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“…They move toward and spread along with the interface of water and oil. Salts improve the migration of asphaltenes to the water–oil interface ,,, (Figure ).…”

Section: Underlying Mechanismsmentioning

confidence: 99%

Critical Review of Underlying Mechanisms of Interactions of Asphaltenes with Oil and Aqueous Phases in the Presence of Ions

Mahdavi

Moghadam

2021

Energy Fuels

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Asphaltene studies have been a prime focus topic for many decades. However, the underlying interaction mechanisms between water, oil, and asphaltenes requires more attention. Water is involved in all production parts (reservoir, tubing, surface facilities, and refinery), posing comprehensive research about the issues and operating conditions. According to the available literature, there are contradictory opinions regarding the effect of salinity on the aqueous phase and the oil phase interfacial characteristics. This review provides a critical summary of asphaltene’s role in the stability of the aqueous phase emulsions in an oil phase. We reviewed the effect of temperature, pressure, asphaltene concentration, bulk phase components, different salinity, types of ions, and pH on emulsion stability regarding the low salinity water injection aspects. Moreover, the studied cases investigating emulsion stability in the presence of asphaltenes and other species were collected, compared, and categorized. Furthermore, the interfacial and rheological characteristics of the brine–oil interface composed of asphaltenes and other species were compared. We found that the effect of some parameters requires an in-depth study as there are not many related works. For example, the effect of pressure on the rheological characteristics of emulsions and, at the same time, on the aggregation, precipitation, and deposition using visual devices (high pressure–high temperature microfluidic) is missing from the literature. Therefore, we recommend a specific study of each crude oil’s combined effects of temperature, pressure, and salinity. Low salinity water injection is a newly developed enhanced oil recovery method that employs the results of emulsion studies in the presence of different ions and reservoir conditions (high pressure and high temperature).

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“…They move toward and spread along with the interface of water and oil. Salts improve the migration of asphaltenes to the water–oil interface ,,, (Figure ).…”

Section: Underlying Mechanismsmentioning

confidence: 99%

Critical Review of Underlying Mechanisms of Interactions of Asphaltenes with Oil and Aqueous Phases in the Presence of Ions

Mahdavi

Moghadam

2021

Energy Fuels

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“…Finally, it should be noticed here that the produced, in the present work, W/HFO emulsion stays nearly stable for several months. Thus according to (Da Silva et al, 2018), which mentioned that, stable W/HFO emulsions are defined as those that persist without phase separation for five days or more, one can conclude that, the produced emulsions are very stable.…”

Section: W/hfo Emulsion Stabilitymentioning

confidence: 99%

Water/Heavy Fuel Oil Emulsion Production, Characterization and Combustion

Alaa

Soulayman

Abdelkarim

et al. 2021

Int. J. Renew. Energy Dev.

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In order to produce a water/heavy fuel oil emulsion (W/HFO) with different water contents to cover the daily needs of a fire tube boiler or a water tube boiler, a special homogenizer is designed, constructed and tested. The produced emulsion is characterized and compared with the pure HFO properties. It is found experimentally in fire tube boiler that, the use of W/HFO emulsion with 8% of water content (W0.08/HFO0.92) instead of HFO leads to a saving rate of 13.56% in HFO. For explaining the obtained energy saving the term “equivalent heat value (EHV) of the W/HFO emulsions”, defined as the ratio of the W/HFO emulsion net calorific value to the HFO content in the emulsion, is used. Based on direct measurements, provided in this work, it was found that the equivalent heat value (EHV) increases with the water content in the water/heavy fuel oil (W/HFO). It reaches 1.06 times of HFO net calorific value at water content of 22.24%. The obtained, in the present work, experimental results demonstrate the dependence of the emulsion EHV on its water content. These results are in agreement with the results of other authors. Therefore, the contribution of water droplets in the emulsion combustion is verified. It is found experimentally that, the emitted CO, SO2 and H2S gases from the fire tube boiler chimney decreases by 5.66%. 3.99% and 48.77% respectively in the case of (W0.08/HFO0.92) emulsion use instead of HFO.

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“…Ainda segundo da Silva et al (2018), a proporção entre o coeficiente de capilaridade é inversa ao tamanho dos raios capilares, significando a preferência pela obtenção de raios maiores.…”

Section: Absorção De áGuaunclassified

“…Segundo daSilva et al (2018), a cal de carbureto por ser uma derivação da cal, aumenta o consumo de água, por seguinte, formando uma junção maior das partículas. Dessa forma, o concreto com adição de cal de carbureto tenderá a melhorar a plasticidade do artefato de concreto e diminuir o abatimento do concreto.…”

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