De-emulsification and gravity separation of micro-emulsion produced with enhanced oil recovery chemicals flooding

Khan, M.K.A. and Khan, J.A. and Ullah, H. and Al-Kayiem, H.H. and Irawan, S. and Irfan, M. and Glowacz, A. and Liu, H. and Glowacz, W. and Rahman, S. (2021) De-emulsification and gravity separation of micro-emulsion produced with enhanced oil recovery chemicals flooding. Energies, 14 (8).

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The present study investigates the effect of TiO2 nanoparticles on the stability of Enhanced Oil Recovery (EOR)-produced stable emulsion. The chemical precipitation method is used to synthesize TiO2 nanoparticles, and their properties were determined using various analytical characterization techniques such as X-ray Diffraction (XRD), High-Resolution Transmission Electron Microscopy (HRTEM), and Field Emission Scanning Electron Microscopy (FESEM). The effect of TiO2 nanoparticles is evaluated by measuring oil/water (o/w) separation, rag layer formation, oil droplet size, and zeta potential of the residual EOR produced emulsion. The laser scattering technique is used to determine the o/w separation. The results showed that spherical-shaped anatase phase TiO2 nanoparticles were produced with an average particle size of 122 nm. The TiO2 nanoparticles had a positive effect on o/w separation and the clarity of the separated water. The separated aqueous phases� clarity is 75 and 45 with and without TiO2 nanoparticles, respectively. Laser scattering analysis revealed enhanced light transmission in the presence of TiO2 nanoparticles, suggesting higher o/w separation of the ASP-produced emulsion. The overall increase in the o/w separation was recorded to be 19 in the presence of TiO2 nanoparticles, indicating a decrease in the stability of ASP-produced emulsion. This decrease in the stability can be attributed to the improved coalescence� action between the adjacent oil droplets and improved behavior of o/w interfacial film. An observable difference was found between the oil droplet size before and after the addition of TiO2 nanoparticles, where the oil droplet size increased from 3 µm to 35 µm. A similar trend of zeta potential is also noticed in the presence of TiO2 nanoparticles. Zeta potential was �13 mV to �7 mV, which is in the unstable emulsion range. Overall, the o/w separation is enhanced by introducing TiO2 nanoparticles into ASP-produced stable emulsion. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.

Item Type:Article
Impact Factor:cited By 0
Uncontrolled Keywords:Chemical analysis; Drops; Emulsification; Field emission microscopes; High resolution transmission electron microscopy; Light transmission; Nanoparticles; Oil well flooding; Oxide minerals; Particle size; Particle size analysis; Scanning electron microscopy; Separation; Synthesis (chemical); TiO2 nanoparticles; Titanium dioxide; Transmissions; Zeta potential, Analytical characterization; Average particle size; Chemical precipitation method; Enhanced light transmission; Enhanced oil recovery; Field emission scanning electron microscopy; Gravity separation; Laser-scattering techniques, Enhanced recovery
ID Code:23920
Deposited By: Ms Sharifah Fahimah Saiyed Yeop
Deposited On:19 Aug 2021 13:23
Last Modified:19 Aug 2021 13:23

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