Demulsification of Water-in-Oil Emulsions by Means of Dielectrophoresis

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MOZAFARI M.; Ganjizade A.; Ashrafizadeh S.N

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Journal: IRANIAN JOURNAL OF CHEMICAL ENGINEERING Year:2020 | Volume:17 | Issue:3 Page(s): 24-40

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Title

Demulsification of Water-in-Oil Emulsions by Means of Dielectrophoresis

Author(s)

MOZAFARI M. | Ganjizade A. | Ashrafizadeh S.N | Issue Writer Certificate

Keywords

Dielectrophoresis

Water-in-Oil Emulsion

Electric Field

Response Surface Methodology

Abstract

In this work, the demulsification of water-in-crude oil emulsions by Dielectrophoresis via applying a non-uniform Electric Field in a labscale cylindrical cell was studied. The stability of emulsions was assessed through monitoring the size distribution of water droplets at 0, 3, 6, and 24 hours after the preparation of emulsion. The effect of operating parameters including the temperature, demulsifier concentration, water salinity, and time on the demulsification of water was investigated. Sodium dodecyl sulfate and sodium chloride were used as demulsifier and salt respectively. The experiments were designed by the Response Surface Methodology (RSM) based on the central composite design (CCD). The operating parameters including the voltage, temperature, demulsifier concentration, salinity of water, and separation time were optimized. The contours and 3-D response surfaces of the water separation were acquired. A quadratic polynomial model, which was statistically highly significant (R 2 =0. 9950, n=32), was provided by the RSM to predict the amount of the separated water. Comparison among the experimental and RSMoptimized values indicates a good agreement. The optimum amount of the water separation was obtained at the voltage of 15 kV, temperature of 60 ° C, demulsifier concentration of 123 ppm, salinity of water of 12260 ppm, and separation time of 12. 4 minutes. Under such conditions, the separation of water reached 98 %. The results obviously show that the Electric Field can be used as an appropriate means for the breakage of W/O emulsions.

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APA: Copy

MOZAFARI, M., Ganjizade, A., & Ashrafizadeh, S.N,. (2020). Demulsification of Water-in-Oil Emulsions by Means of Dielectrophoresis. IRANIAN JOURNAL OF CHEMICAL ENGINEERING, 17(3), 24-40. SID. https://sid.ir/paper/982479/en

Vancouver: Copy

MOZAFARI M., Ganjizade A., Ashrafizadeh S.N,. Demulsification of Water-in-Oil Emulsions by Means of Dielectrophoresis. IRANIAN JOURNAL OF CHEMICAL ENGINEERING[Internet]. 2020;17(3):24-40. Available from: https://sid.ir/paper/982479/en

IEEE: Copy

M. MOZAFARI, A. Ganjizade, and S.N, Ashrafizadeh, “Demulsification of Water-in-Oil Emulsions by Means of Dielectrophoresis,” IRANIAN JOURNAL OF CHEMICAL ENGINEERING, vol. 17, no. 3, pp. 24–40, 2020, [Online]. Available: https://sid.ir/paper/982479/en

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