Influence of the plate-type continuous micro-separator dimensions on the efficiency of demulsification of oil-in-water emulsion

Roques-Carmes, Thibault; Monnier, Hubert; Portha, Jean-François; Marchal, Philippe; Laurent, Fabrice

doi:10.1016/j.cherd.2014.02.001

Cited by 18 publications

(10 citation statements)

References 34 publications

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“…Sedimentation is an important mechanism of crude oil demulsification and is characterized by the water droplets in an emulsion settling at the bottom of the continuous oil phase [62]. In contrast, creaming is the rising of oil droplets to the surface of the water phase [91]. Thus, whether sedimentation or creaming occurs is dependent on whether the dispersed phase is water or oil, respectively.…”

Section: Creaming and Sedimentationmentioning

confidence: 99%

An Overview of Recent Advances in State-of-the-Art Techniques in the Demulsification of Crude Oil Emulsions

et al. 2019

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The processing of crude oil often requires the extraction of a large amount of water. Frequently, crude oil is mixed with water to form water-in-crude oil emulsions as the result of factors such as high shear at the production wellhead and surface-active substances that are naturally present in crude oil. These emulsions are undesirable and require demulsification to remove the dispersed water and associated inorganic salts in order to meet production and transportation specifications. Additionally, the demulsification of these crude oil emulsions mitigates corrosion and catalyst poisoning and invariably maximizes the overall profitability of crude oil production. Recently, there has been growing research interest in developing workable solutions to the difficulties associated with transporting and refining crude oil emulsions and the restrictions on produced water discharge. Therefore, this paper reviews the recent research efforts on state-of-the-art demulsification techniques. First, an overview of crude oil emulsion types, formation, and stability is presented. Then, the parameters and mechanisms of emulsification formation and different demulsification techniques are extensively examined. It is worth noting that the efficiency of each of these techniques is dependent on the operating parameters and their interplay. Moreover, a more effective demulsification process could be attained by leveraging synergistic effects by combining one or more of these techniques. Finally, this literature review then culminates with propositions for future research. Therefore, the findings of this study can help for a better understanding of the formation and mechanisms of the various demulsification methods of crude oil to work on the development of green demulsifiers by different sources.

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Section: Creaming and Sedimentationmentioning

confidence: 99%

An Overview of Recent Advances in State-of-the-Art Techniques in the Demulsification of Crude Oil Emulsions

et al. 2019

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“…They have received considerable attention as they are promising systems for drug delivery [1] and for industrial applications in the areas of medicine, cosmetics, food products or optical display technology [2]. However, the current ways of production of double emulsions by conventional apparatuses like high shear devices (Ultraturrax®, helical roll mills) or ultrasound devices are usually operated in two steps, and result in broad size distributions [2,3,4]. This large size distribution of the droplets accelerates significantly the ageing of the emulsions, improves drug delivery and leads to less positive controlled release of loaded active substance.…”

Section: Introductionmentioning

confidence: 99%

“…This technique has been applied and extended to the production of polymer core-polymer shell particles [2]. They used a capillary-based microfluidic device consisting of two-coaxial capillaries (hydrophilic fused silica tubing, 4 and/or hydrophobic PEEK or PTFE tubing) which relative tips position influences the type of particles formed (large double droplets, droplets with multiple core, rod-like particles…). The main advantage of this device is to keep the dispersed phase away from the outside walls, what prevents phase inversion [2].…”

Section: Introductionmentioning

confidence: 99%

Polyelectrolytes layer-by-layer surface modification of PDMS microchips for the production of simple O/W and double W/O/W emulsions: From global to localized treatment

Stauffer

Péter

Alem

et al. 2019

Chemical Engineering and Processing - Process Intensification

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“…As one example of the new technology, micro-channels applied in demulsification have attracted considerable attention in the last decade. Two main structural types of micro-channels have been applied in demulsification: linear micro-channels [12,13,14,15] and arc or spiral micro-channels [16]. The channels of the former comprise one or more linear grooves, and those of the latter are arcs or spirals, as shown in Figure 1.…”

Section: Introductionmentioning

confidence: 99%

“…To de-emulsify the droplets of an emulsion using surface tension, the micro-channels were usually asymmetric, i.e., the upper and lower walls of micro-channels were hydrophobic and hydrophilic, respectively. Asymmetric linear micro-channels [12,13,14,15,16] have been utilized to de-emulsify oil-in-water emulsions since 2004. Okubo et al [12] used linear glass-polytetrafluoroethylene (PTFE) micro-channels with a height of 5–12 μm to de-emulsify octanoldodecanese in water emulsions with a median droplet diameter (D 50 ) of 60 μm.…”

Section: Introductionmentioning

confidence: 99%

Demulsification of Kerosene/Water Emulsion in the Transparent Asymmetric Plate-Type Micro-Channel

Ruan

Hamiti

et al. 2018

Micromachines

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Asymmetric plate-type micro-channels (APM) have one hydrophobic wall and one hydrophilic wall. By flowing through APM, a kerosene-in-water emulsion can be de-emulsified in one second. To date, however, the demulsification process in the APM is still a black box. In order to observe the demulsification process directly, transparent asymmetric plate-type micro-channels (TAPM) were fabricated with two surface-modified glass plates. Emulsions with oil contents of 10%, 30%, and 50% were pumped through TAPM with heights of 39.2 μm and 159.5 μm. The movement and coalescence of oil droplets (the dispersed phase of a kerosene-in-water emulsion) in the TAPM were observed directly with an optical microscope. By analyzing videos and photographs, it was found that the demulsification process included three steps: oil droplets flowed against and were adsorbed on the hydrophobic wall, then oil droplets coalesced to form larger droplets, whereupon the oil phase was separated. The experimental results showed that the demulsification efficiency was approximately proportional to the oil content (30–50%) of the emulsions and increased when the micro-channel height was reduced.

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Influence of the plate-type continuous micro-separator dimensions on the efficiency of demulsification of oil-in-water emulsion

Cited by 18 publications

References 34 publications

An Overview of Recent Advances in State-of-the-Art Techniques in the Demulsification of Crude Oil Emulsions

An Overview of Recent Advances in State-of-the-Art Techniques in the Demulsification of Crude Oil Emulsions

Polyelectrolytes layer-by-layer surface modification of PDMS microchips for the production of simple O/W and double W/O/W emulsions: From global to localized treatment

Demulsification of Kerosene/Water Emulsion in the Transparent Asymmetric Plate-Type Micro-Channel

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