Prediction of size distribution of crude oil drops in the permeate using a slotted pore membrane

Ullah, Asmat; Holdich, Richard; Naeem, M.; Khan, Sajjad Wali; Starov, Victor

doi:10.1016/j.cherd.2014.02.017

Cited by 14 publications

(13 citation statements)

References 24 publications

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“…Under the same operating conditions, the converging membrane slots give a higher permeate concentration of crude oil (average of 35.5% for 22 °API, 17% for 27 °API, and 38.6% for 30 °API crude oil drops) than the permeate concentration of nonconverging membrane slots, indicating that oil drops show a high static force for the nonconverging slotted microstructured membrane as compared to the static force for the converging slotted pore membrane. Similar results were also reported by 39 that sudden deformation of oil drops occurs through the converging slotted pore membrane, which leads to low static force and high permeation of oil drops through the membrane, while gradual deformation of oil drops occurs, which leads to a higher static force and a low number of drops passes through the membrane under the same operating conditions including the flux rate, interfacial tension, size, and length of the membrane slot.…”

Section: Resultssupporting

confidence: 88%

“…Figure 5a presents the concentration of crude oil drops in the feed. 39 When oil drops pass through the membrane slot, static force and drag force come into play. As discussed earlier, the static force is accountable for the retention (rejection) of the drops from the membrane, and it was calculated from eq 1 using a nonconverging (straight) slotted pore membrane.…”

Section: Resultsmentioning

confidence: 99%

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Crude Oil Drop Penetration into Permeates Using a Slotted Pore Membrane

et al. 2021

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The primary focus of the presented research is to come up with a model that could be utilized to evaluate the permeate content (concentration) of oil drops using a straight (nonconverging) slotted microstructured membrane. The content (concentration) of crude drops in the permeate with a nonconverging slit structure membrane has not been studied before, and the study presented would be a good contribution to the literature. A comparison between the use of a converging (narrowing toward the inside) and a nonconverging slotted pore microstructured membrane is made for the purpose of removing oil content from the produced water. Due to the drag force, the droplets pass through the membrane slots; however, the static force acts in the opposite direction and tries to reject droplets by the membrane. At a certain point, these two forces balance the effect of each other, which is known as "100% cutoff through the membrane". A linear line is obtained by joining the 100% cutoff or rejection point to the 0% rejection point, which is referred to as the "linear fit" in this paper. The linear fit approach could be utilized for estimating rejection below the 100% cutoff point. Various types of crude oil drops obtained from different locations were analyzed experimentally, and the results were compared with the presented model. The proposed model was found to be in agreement with the different types of oil drops. Experimental and predicted results showed that the nonconverging slotted microstructured membrane provided low friction to oil drops through the membrane as compared to the converging slots. Furthermore, the developed model can be utilized to predict the overall oil content in the permeate. This research has great importance and will allow researchers around the globe to estimate crude oil concentration within the allowable limits.

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Section: Resultssupporting

confidence: 88%

Section: Resultsmentioning

confidence: 99%

Crude Oil Drop Penetration into Permeates Using a Slotted Pore Membrane

et al. 2021

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“…Many researchers have also studied the impact of membrane pore geometry on separation efficiency [36][37][38][39]. Recently, slotted pore membranes were introduced for oil-water emulsion purification [24,35,[40][41][42][43][44]. It was found that a slotted pore membrane gives a greater value of permeate flux at a lower transmembrane pressure compared to circular pore membranes [35].…”

Section: Introductionmentioning

confidence: 99%

Influence of Membrane Vibration on Particles Rejection Using a Slotted Pore Membrane Microfiltration

et al. 2021

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A new method is proposed to increase the rejection in microfiltration by applying membrane oscillation, using a new type of microfiltration membrane with slotted pores. The oscillations applied to the membrane surface result in reduced membrane fouling and increased separation efficiency. An exact mathematical solution of the flow in the surrounding solution outside the oscillating membrane is developed. The oscillation results in the appearance of a lift velocity, which moves oil particles away from the membrane. The latter results in both reduced membrane fouling and increased oil droplet rejection. This developed model was supported by the experimental results for oil water separation in the produced water treatment. It was proven that the oil droplet concentration was reduced notably in the permeate, due to the membrane oscillation, and that the applied shear rate caused by the membrane oscillation also reduced pore blockage. A four-times lower oil concentration was recorded in the permeate when the membrane vibration frequency was 25 Hz, compared to without membrane vibration. Newly generated microfiltration membranes with slotted pores were used in the experiments.

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“…It has been found that MF membrane gives greater permeate flux at lower trans membrane pressure as compared to UF process.MF is more economical for oil water separation on commercial scale [33][34][35].Various researchers have also studied the impact of membrane pore geometry on separation efficiency [36][37][38][39]. Recently slotted pore membranes were introduced for oil water emulsion purification [24,35,[40][41][42][43][44]. It was found that slotted pore membrane gives greater value of permeate flux at less trans-membrane.pressure compared to circular pore membrane [35].…”

Section: Introductionmentioning

confidence: 99%

Increasing Rejection in Microfiltration Using Vibrating Membrane

Ullah¹,

Alam²,

Khan³

et al. 2021

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A new method is proposed to increase rejection in microfiltration by applying membrane oscillation using a new type of microfiltration membranes with slotted pores. The oscillations applied to the membrane surface result in reducing membrane fouling and increasing separation efficiency. An exact mathematical solution of the flow in the surrounding solution outside the oscillating membrane is developed. The oscillation results in appearance of the lift velocity, which moves oil particles away from the membrane. The latter results in both reducing membrane fouling and increasing oil droplets rejection. This developed model was supported by the experimental results for oil water separation in produced water treatment. It was proven that oil droplet concentration reduced notably in the permeate due to the membrane oscillation and that applied shear rate caused by the membrane oscillation is also reduce pore blockage. New generation of microfiltration membranes with slotted pores was used in the experiments.

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Prediction of size distribution of crude oil drops in the permeate using a slotted pore membrane

Cited by 14 publications

References 24 publications

Crude Oil Drop Penetration into Permeates Using a Slotted Pore Membrane

Crude Oil Drop Penetration into Permeates Using a Slotted Pore Membrane

Influence of Membrane Vibration on Particles Rejection Using a Slotted Pore Membrane Microfiltration

Increasing Rejection in Microfiltration Using Vibrating Membrane

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