Bibliographies thématiques / Oil coalescence

Littérature scientifique sur le sujet « Oil coalescence »

Auteur : Grafiati
Publié le 10 mars 2023

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Articles de revues sur le sujet "Oil coalescence"

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Xu, Danyun, Ling Zhu, Ziyu Yang, Jiale Gao et Man Jin. « Parameter Optimization of Catering Oil Droplet Electrostatic Coalescence under Coupling Field with COMSOL Software ». Atmosphere 13, no 5 (12 mai 2022) : 780. http://dx.doi.org/10.3390/atmos13050780.

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At present, the common cooking fume purification devices are mostly based on electrostatic technology. There are few researches on the microscopic process of coalescence and electric field parameters’ optimization. In this paper, COMSOL MultiphysicsTM was used to simulate the electrostatic coalescence of oil droplets in the coupling field of an electric field and flow field. The degree of deformation of oil droplets (D) and the starting coalescence time (tsc) were used to evaluate the coalescence process. The feasibility of the model was verified through experimental results. The effects of voltage, flow speed and oil droplet radius on tsc were investigated, and the parameters were optimized by the response surface method and Matrix correlation analysis. It can be concluded that increasing the voltage, flow speed and oil droplet radius appropriately would be conducive to the coalescence of oil droplets. When the oil droplet radius was in the range of 0–1.5 mm, it promoted the coalescence of oil droplets. The influence of various factors on oil droplet coalescence was flow speed > voltage > oil droplet radius. The optimal result obtained by simulation was that when the radius of the oil droplet was 1.56 mm, the voltage 12 kV and the flow speed 180 mm/ms, the shortest coalescence time of oil droplets was 16.8253 ms.
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Zhang, Lei, Zhong Min Wang, Hai Tao Ma, Wei Gang Wang et Jun Jie Yang. « The Reorganization Coalescence Oil-Removing Device and the Effect of Treating Polymer Flooding Produced Liquid ». Advanced Materials Research 726-731 (août 2013) : 1994–98. http://dx.doi.org/10.4028/www.scientific.net/amr.726-731.1994.

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In view of problem of the coalescence material jam and the demulsification lower by using the Coalescence oil-removing device which was using to treat high viscosity polymer flooding. The novel Coalescence oil-removing device was developed through the optimization of coalescence material and reasonable backwashing system designing, which can realize coalescence material regeneration and improve oil strains of coalescence effect. At the condition that polymer concentration was 426mg/L, pH=8.75, average oil was 365mg/L, suspended solid (SS) was 75mg/L; The oil of effluent can reach 50mg/L below, removal rate reached 86%; SS of the out water can reach 30mg / L, the removal rate reached 60%.
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Chen, Shuai, Jiadao Wang, Chaolang Chen et Awais Mahmood. « Understanding the coalescence and non-coalescence of underwater oil droplets ». Chemical Physics 529 (janvier 2020) : 110466. http://dx.doi.org/10.1016/j.chemphys.2019.110466.

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Anand, Vikky, Subhankar Roy, Vijay M. Naik, Vinay A. Juvekar et Rochish M. Thaokar. « Electrocoalescence of a pair of conducting drops in an insulating oil ». Journal of Fluid Mechanics 859 (26 novembre 2018) : 839–50. http://dx.doi.org/10.1017/jfm.2018.849.

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The effect of an electric field on the coalescence of two water drops suspended in an insulating oil is investigated. We report four new results. (i) The cone angle for the non-coalescence of drops can be significantly smaller (as small as $19^{\circ }$) than the value of $30.8^{\circ }$ reported by Bird et al. (Phys. Rev. Lett., vol. 103 (16), 2009, 164502). (ii) A surprising observation of the dependence of the mode of coalescence/non-coalescence on the type of insulating oil is seen. A cone–cone mode for silicone oil is observed as against cone–dimple mode for castor oil. (iii) The critical capillary number for non-coalescence decreases with increase in the conductivity of the droplet phase. (iv) Systematic experiments prove that the apparent bridge during non-coalescence is indeed transitory and not permanent, as reported elsewhere. Theoretical calculations using analytical theory and the boundary integral method explain the formation of the cone–dimple mode as well as the transitory bridge length. The numerical calculation and thereby the physical mechanism to explain the occurrence of very small non-coalescence angles as well as the dependence of the phenomenon on the conductivity of the insulating oil and the water droplets remain unexplained.
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Taboada, Martha, Nico Leister, Heike Karbstein et Volker Gaukel. « Influence of the Emulsifier System on Breakup and Coalescence of Oil Droplets during Atomization of Oil-In-Water Emulsions ». ChemEngineering 4, no 3 (3 août 2020) : 47. http://dx.doi.org/10.3390/chemengineering4030047.

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Spray drying of whey protein-based emulsions is a common task in food engineering. Lipophilic, low molecular weight emulsifiers including lecithin, citrem, and mono- and diglycerides, are commonly added to the formulations, as they are expected to improve the processing and shelf life stability of the products. During the atomization step of spray drying, the emulsions are subjected to high stresses, which can lead to breakup and subsequent coalescence of the oil droplets. The extent of these phenomena is expected to be greatly influenced by the emulsifiers in the system. The focus of this study was therefore set on the changes in the oil droplet size of whey protein-based emulsions during atomization, as affected by the addition of low molecular weight emulsifiers. Atomization experiments were performed with emulsions stabilized either with whey protein isolate (WPI), or with combinations of WPI and lecithin, WPI and citrem, and WPI and mono- and diglycerides. The addition of lecithin promoted oil droplet breakup during atomization and improved droplet stabilization against coalescence. The addition of citrem and of mono- and diglycerides did not affect oil droplet breakup, but greatly promoted coalescence of the oil droplets. In order to elucidate the underlying mechanisms, measurements of interfacial tensions and coalescence times in single droplets experiments were performed and correlated to the atomization experiments. The results on oil droplet breakup were in good accordance with the observed differences in the interfacial tension measurements. The results on oil droplet coalescence correlated only to a limited extent with the results of coalescence times of single droplet experiments.
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Barman, Jitesh, Arun Kumar Nagarajan et Krishnacharya Khare. « Controlled electro-coalescence/non-coalescence on lubricating fluid infused slippery surfaces ». RSC Advances 5, no 128 (2015) : 105524–30. http://dx.doi.org/10.1039/c5ra21936a.

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Leister, Nico, et Heike Petra Karbstein. « Determination of the Dominating Coalescence Pathways in Double Emulsion Formulations by Use of Microfluidic Emulsions ». Processes 11, no 1 (11 janvier 2023) : 234. http://dx.doi.org/10.3390/pr11010234.

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In water-in-oil-in-water (W1/O/W2) double emulsions several irreversible instability phenomena lead to changes. Besides diffusive processes, coalescence of droplets is the main cause of structural changes. In double emulsions, inner droplets can coalesce with each other (W1–W1 coalescence), inner droplets can be released via coalescence (W1–W2 coalescence) and oil droplets can coalesce with each other (O–O coalescence). Which of the coalescence pathways contributes most to the failure of the double emulsion structure cannot be determined by common measurement techniques. With monodisperse double emulsions produced with microfluidic techniques, each coalescence path can be observed and quantified simultaneously. By comparing the occurrence of all possible coalescence events, different hydrophilic surfactants in combination with PGPR are evaluated and discussed with regard to their applicability in double emulsion formulations. When variating the hydrophilic surfactant, the stability against all three coalescence mechanisms changes. This shows that measuring only one of the coalescence mechanisms is not sufficient to describe the stability of a double emulsion. While some surfactants are able to stabilize against all three possible coalescence mechanisms, some display mainly one of the coalescence mechanisms or in some cases all three mechanisms are observed simultaneously.
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Liu, Shasha, Hengming Zhang et Shiling Yuan. « Hydrophilic Silica Nanoparticles in O/W Emulsion : Insights from Molecular Dynamics Simulation ». Molecules 27, no 23 (1 décembre 2022) : 8407. http://dx.doi.org/10.3390/molecules27238407.

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Previous studies have been carried out on the effect of silica nanoparticles (SNPs) on the stability of oil–water emulsions. However, the combining configuration of SNPs and oil droplets at the molecular level and the effect of SNP content on the coalescence behavior of oil droplets cannot be obtained through experiments. In this paper, molecular dynamics (MD) simulation was performed to investigate the adsorption configuration of hydrophilic SNPs in an O/W emulsion system, and the effect of adsorption of SNPs on coalescence of oil droplets. The simulation results showed: (i) SNPs adsorbed on the surface of oil droplets, and excessive SNPs self-aggregated and connected by hydrogen bonds. (ii) Partially hydrophilic asphaltene and resin molecules formed adsorption configurations with SNPs, which changed the distribution of oil droplet components. Furthermore, compared with hydrophobic asphaltene, the hydrophilic asphaltene was easier to combine with SNPs. (iii) SNPs would extend the oil droplet coalescence time, and the π–π stacking structures were formed between asphaltene and asphaltene or resin molecules to enhance the connection between oil droplets during the oil droplet contact process. (iv) Enough SNPs tightly wrapped around the oil droplet, similar to the formation of a rigid film on the surface of an oil droplet, which hindered the contact and coalescence of components between oil droplets.
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Wang, Fei, Lin Wang, Guoding Chen et Donglei Zhu. « Numerical Simulation of the Oil Droplet Size Distribution Considering Coalescence and Breakup in Aero-Engine Bearing Chamber ». Applied Sciences 10, no 16 (14 août 2020) : 5648. http://dx.doi.org/10.3390/app10165648.

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In order to improve the inadequacy of the current research on oil droplet size distribution in aero-engine bearing chamber, the influence of oil droplet size distribution with the oil droplets coalescence and breakup is analyzed by using the computational fluid dynamics-population balance model (CFD-PBM). The Euler–Euler equation and population balance equation are solved in Fluent software. The distribution of the gas phase velocity field and the volume fraction of different oil droplet diameter at different time are obtained in the bearing chamber. Then, the influence of different initial oil droplet diameter, air, and oil mass flow on oil droplet size distribution is discussed. The result of numerical analysis is compared with the experiment in the literature to verify the feasibility and validity. The main results provide the following conclusions. At the initial stage, the coalescence of oil droplets plays a dominant role. Then, the breakup of larger diameter oil droplet appears. Finally, the oil droplet size distribution tends to be stable. The coalescence and breakup of oil droplet increases with the initial diameter of oil droplet and the air mass flow increasing, and the oil droplet size distribution changes significantly. With the oil mass flow increasing, the coalescence and breakup of oil droplet has little change and the variation of oil droplet size distribution is not obvious.
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Kalogianni, Eleni P., Despoina Georgiou et Stylianos Exarhopoulos. « Olive oil droplet coalescence during malaxation ». Journal of Food Engineering 240 (janvier 2019) : 99–104. http://dx.doi.org/10.1016/j.jfoodeng.2018.07.017.

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Thèses sur le sujet "Oil coalescence"

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Stoyel, Jason Alexander. « Fundamentals of drop coalescence in crude oil ». Thesis, Imperial College London, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.312176.

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Eow, John Son. « Electrostatic enhancement of coalescence of water drops in oil ». Thesis, University of Surrey, 2002. http://epubs.surrey.ac.uk/842815/.

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Dispersed water drops in oils can cause detrimental effects. For example in refining and cracking of crude oil, poisoning of catalysts and equipment corrosion can be major problems due to the presence of water. Therefore there is a need to develop more efficient and cost-effective separators. The work in this thesis covers an investigation of the underlying electrostatic phenomena (i.e. drop-drop and drop-interface coalescence and drop deformation and break-up) leading to the development of compact electrocoalescer-separators. Using novel two-dimensional electrode systems, it is shown here that coalescence readily occurs when the electric field is applied in the same direction as the line joining the centres of the two drops, in line with the previous theoretical prediction of the maximum attractive force induced in this way. An adaptive Finite Element Method, incorporating automatic error and mesh generator programmes, has been used to quantify the electric-induced forces of charged spheres in an insulating medium, for short distances that are much smaller than the drop radius, where analytical solutions are no longer reliable. Moreover, drop-drop attraction can also occur when the angle is 125.3° from the electric field direction. Previous work suggests that pulsed d.c. fields are effective for low-aqueous-content systems, and this has been further investigated here. The applied electric field and pulse frequency can be optimised to achieve the highest coalescence rate. High electric fields (> 3.5 kV/cm) are shown to deform and break up aqueous drops when the electric field-induced stresses overcome the interfacial tension. A critical electrostatic Weber number, corresponding to the onset of drop break-up, has been evaluated to be about 0.49 for several aqueous-oil systems. For the separation of dispersed aqueous drops from an oil phase, it is advantageous to incorporate an aqueous layer to induce drop-interface coalescence. A suitably applied electric field is shown to give efficient drop-interface coalescence. The above investigations have led to the design and development of two compact electrocoalescer-separators. The first separator combines the effects of electrocoalescence and gravitational settling. The second separator, which utilises the electrocoalescence and centrifugal effects, can handle larger throughputs with reasonable separation efficiency. Both devices significantly enhance the separation and are good examples of how the fundamental understanding gained in this studies can be applied to realistic practical situations.
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Jayarajah, James Nirmal. « Coalescence and filtration of emulsions using fibres ». Thesis, Imperial College London, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.343600.

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Teare, Declan O. H. « Cross-linked 'silicone oil'/water emulsions ». Thesis, University of Bristol, 1997. http://hdl.handle.net/1983/0b48bef9-20fa-4ff4-a903-94c567606303.

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Kufås, Eirik. « Mathematical Modeling of Coalescence of Oil Droplets in Water Flow ». Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for energi- og prosessteknikk, 2008. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-12879.

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Liquid-liquid coalescers are devices used for increasing the droplet size of the dispersed phase in continuous phase flow, such as oil droplets in water flow. The efficiency of separation technologies is strongly dependent on the droplet size, which is desirable to shift into larger droplet diameters. Theory behind coalescence and its modeling is studied in this Maser’s thesis. Aker Process Systems AS, Division of Advanced Separation Technology, provided the assignment proposal.The scope of this work is a literature study on the coalescence phenomenon and the closely related break-up phenomenon and CFD modeling in general. Further a mathematical model for simulating coalescence of oil droplets in continuous water flow is developed by the use of the commercial CFD-code FLUENT. The basis for the model is a swirl-based coalescer called Compact Tubular Coalescer (CTC), developed by Aker Process Systems AS.The validity of the model is evaluated before different aspects of the performance of the coalescer are studied. Several validation criteria were tested and were acceptable, but some weaknesses regarding lack of test cases were detected. The performance testing showed good performance of the CTC, it was able to increase the Sauter Mean Diameter (SMD) of the droplet with up to 250% for the smallest droplets (20 μm) and highest volume fractions (7%). Remarkable differences of the performance were observed as the physical properties were changed. Higher viscosity and droplet surface tension lead to increased coalescence rate and decreased break-up rate.Future work is recommended to concentrate on improving the present model and to investigate more aspects of the model. An effort should also be made to use a Eulerian approach to model the dispersed phase with the use of population balances, in order to be able to simulate flows with larger dispersed phase volume fractions.
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Angle, Chandrawatee W. « Stability of heavy oil emulsions in turbulent flow and different chemical environments ». Thesis, University of Manchester, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.547848.

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Nassif, Merhej-Marc. « Developing critical coalescence concentration curves using dilution and determining frother-like properties of oil sands process water ». Thesis, McGill University, 2014. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=121253.

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In flotation, the rate with which mineral particles are recovered is governed by the bubbles generated. The smaller the bubbles, the more surface area is available for transport to the froth zone. Surface-active species, known as frothers, are commonly added to help produce small bubbles in flotation. They are believed to act by coalescence prevention and have different characteristics based on their chemical and structural formulas. Many methods have been developed to categorize the classes of frothers, describing different behaviours and material constants. One such method is the critical coalescence concentration (CCC) of a frother which is determined from a plot of Sauter mean bubble size (D32) vs. frother concentration, referred to here as the 'addition' method. Industrial flotation systems can encounter a number of naturally occurring surfactants and salts that also influence bubble size, such as during oil sands extraction. In effect there is a 'system' CCC. The thesis introduces a new dilution method to identify a system CCC. It is shown that the system CCC can be expressed as an equivalent frother concentration to provide context and a means of comparing water samples. Process water samples from the thickener overflow in Shell Albian Sands were tested. The study showed variability in the frother-equivalence of the process waters reaching at most the equivalent of 60 ppm of DF-250, a value that is much higher than the range of frother concentrations commonly employed in the minerals industry. The viability of using gas holdup to provide an estimate of process water D32 is also explored. A gas holdup to D32 correlation was established and used in developing the CCC curve of a sample, the advantage being gas holdup is an easier parameter to measure. It is concluded that the dilution and frother equivalent techniques can be used to help identify system hydrodynamic properties. A longer term ambition is to consider using gas holdup for on-line application to evaluate possible changes in process waters which may impact these hydrodynamic properties.
Dans le procédé de flottation, la vitesse avec laquelle les particules minérales sont récupérés est régie par les bulles générées. Le plus les bulles sont petites, le plus d'aire superficielle disponible pour le transport vers la zone de mousse. Les espèces tensio-actifs, connus comme agents moussants, sont ajoutés pour aider à produire de petites bulles. Ils sont soupçonnés d'agir par la prévention de la coalescence et ont des caractéristiques différentes en fonction de leurs formules chimiques et structurales. De nombreuses méthodes ont été mises au point pour classer les catégories d'agents moussants. Une telle méthode est la concentration de coalescence critique (CCC) d'un agent moussant qui est déterminée à partir d'un graphique de diameter Sauter qui represente la taille moyenne des bulles (D32) contre la concentration d'agent moussant, une méthod dénommé «Addition».Les systèmes de flottation industriels peuvent rencontrer un certain nombre d'agents tensio-actifs d'origine naturelle et les sels qui influencent également la taille des bulles, comme lors de l'extraction des sables bitumineux. En effet, il ya un «système» CCC. La thèse présente une nouvelle méthode de dilution pour identifier un système CCC. Il est démontré que le système CCC peut être exprimée comme une concentration équivalente d'agent moussant, ce qui contribue a fournir un contexte et un moyen de comparer des échantillons d'eau. Les échantillons d'eau de procédé provenant du débordement d'épaississant dans Shell Albian Sands ont été testés. L'étude a révélé une variabilité dans l'équivalence d'agent moussant des eaux de process atteignant tout au plus l'équivalent de 60 ppm de DF-250, une valeur qui est plus élevé que la gamme de concentrations d'agent moussant couramment utilisés dans l'industrie des minéraux.La viabilité de l'utilisation de la rétention de gaz pour fournir une estimation du D32 des échantillons d'eau est aussi explorée. Une corrélation entre la rétention de gaz et D32 a été établie et utilisée dans le développement de la courbe CCC d'un échantillon, l'avantage étant la simplicité de mesurer le retenue de gaz. Il est conclu que la technique de dilution peut être utilisé pour aider à identifier les propriétés hydrodynamiques du système. Une ambition à long terme est d'utiliser la rétention de gaz pour des applications en ligne pour évaluer les changements possibles dans les eaux de procédé qui peuvent influencer ces propriétés hydrodynamiques.
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Osei-Bonsu, Kofi. « Foam-facilitated oil displacement in porous media ». Thesis, University of Manchester, 2017. https://www.research.manchester.ac.uk/portal/en/theses/foamfacilitated-oil-displacement-in-porous-media(f2b2e93b-3a9b-41fa-a841-f81b271e8fad).html.

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Foam flow in porous media is important for many industrial operations such as enhanced oil recovery, remediation of contaminated aquifers and CO2 sequestration. The application of foam in these processes is due to its unique ability to reduce gas mobility and to divert gas to low permeability zones in porous media which otherwise would not be reached. To achieve optimum success with foam as a displacing fluid in oil recovery and remediation operations, it is essential to understand how different parameters influence foam flow in porous media. In this thesis, a variety of experimental techniques were used to study foam stability, foam rheology as well as the dynamics and patterns of oil displacement by foam under different boundary conditions such as surfactant formulation, oil type, foam quality (gas fraction) and porous media geometry. Bulk scale studies showed that foam stability was surfactant and oil dependant such that decreasing oil carbon number and viscosity decreased the stability of foam. However, no meaningful correlation was found between foam stability at bulk scale and the efficiency of oil displacement in porous media for the various surfactants studied in this work. Additionally, our results show that foams consisting of smaller bubbles do not necessarily correspond to higher apparent viscosity as the foam quality is also crucial. For the same foam quality decreasing bubble size resulted in higher apparent viscosity. Although in theory a higher apparent viscosity (i.e. higher foam quality) would be ideal for displacement purposes, increasing foam quality resulted in less stable foam in porous media due to formation of thin films which were less stable in the presence of oil. The effect of pore geometry on foam generation and oil displacement has also been investigated. Our findings provide new insights about the physics and complex dynamics of foam flow in porous media.
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Kulkarni, Prashant S. « Mixed Hydrophilic/Hydrophobic Fiber Media for Liquid-Liquid Coalescence ». University of Akron / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=akron1310686055.

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Srđan, Sokolović. « Istovremeni uticaj permeabilnosti sloja, prečnika vlakna i ulazne koncentracije uljne faze na separaciju mineralnih ulja iz otpadnih voda ». Phd thesis, Univerzitet u Novom Sadu, Tehnološki fakultet Novi Sad, 2020. https://www.cris.uns.ac.rs/record.jsf?recordId=114057&source=NDLTD&language=en.

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Cilj ove doktorske disertacije je da dâ doprinos u proučavanju nedovoljno poznatih fenomena koalescentne filtracije, kako bi se smanjio obim potrebnih poluindustrijskih istraživanja prilikom projektovnja filtera za neku konkretnu primenu. Svi materijali korišćeni u ovoj doktorskoj disertaciji su otpadni materijali, čija primena kao filtarskog punjenja predstavlja poseban doprinos održivom razvoju. Jedan od ciljeva ove doktorske disertacije je proučavanje istovremenog uticaja promene permeabilnosti sloja i debljine vlakana na osobine sloja, pad pritiska i efikasnost separacije dispergovanog ulja iz kontinualne vodene faze. Uticaj geometrije sloja proučavan je na slojevima homogene i heterogene geometrije po dubini. Realizovano je detaljno ispitivanje izgleda, morfologije vlakana, kao i strukture sloja, izgleda i rasporeda njegovih pora, primenom skening elektronske mikroskopije i optičke mikroskopije. U radu je dat pregled istraživanja primene vlakana različite prirode (slobodnih i međusobno povezanih, krutih i elastičnih, različite debljine te time i različite vijugavosti) i njihovih slojeva. Takođe, dat je doprinos proučavanju istovremenog uticaja promena ulazne koncentracije dispergovane faze i permeabilnosti sloja. U veći deo ostvarenih istraživanja ukjučeno je i proučavanje uticaja prirode uljne faze, pri čemu je neophodno istaći da su sva korišćena ulja mineralnog porekla. Cilj optimizacije rada koalescera bio je da se pronađu uslovi u kojima se postiže maksimalna vrednost kritične brzine uz minimalni pad pritiska.
The aim of this doctoral dissertation is to contribute to the study of insufficiently known phenomena of coalescent filtration, in order to reduce the number of pilot plant experiments required for designing filters for some specific applications. All the used materials are waste materials the use of which as a filter media contributes to sustainable development. One of the goals of this doctoral dissertation is to study the simultaneous effect of changes in bed permeability and fiber thickness on bed properties, pressure drop and the efficiency of the dispersed oil separation from a continuous aqueous phase. The effect of bed geometry was studied by applying the beds of homogeneous and heterogeneous geometry in depth. A detailed examination of the appearance and morphology of the fibers, as well as the structure of the bed and the appearance and arrangement of its pores, was performed by scanning electron microscopy and optical microscopy. The doctoral dissertation gives an overview of the testing of fibers of different nature (free and interconnected, rigid and elastic, of different thickness and thus of different meandering) and their beds. The simultaneous effect of the changes in the input dispersed phase concentration and the bed permeability was also investigated. Much of the conducted research includes the study of the impact of the nature of the oil phase, and it is necessary to point out that all used oils are mineral oils. The goal of optimizing the operation of a coalescer was to find the conditions providing the maximum critical velocity value with a minimum pressure drop.
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Livres sur le sujet "Oil coalescence"

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Man, Chi Cheung. Drop sizes and coalescence rates in oil-in-aqueous and aqueous-in-oil dispersions in stirred vessels. Birmingham : University of Birmingham, 1998.

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Townson, Paul Stephen. Batch coalescence of water-in-oil dispersions using electrostatic fields. Bradford, 1986.

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Chapitres de livres sur le sujet "Oil coalescence"

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Isaacs, E. E., H. Huang, R. S. Chow et A. J. Babchin. « Coalescence Behavior of Water-in-Oil Emulsions ». Dans Particle Technology and Surface Phenomena in Minerals and Petroleum, 157–71. Boston, MA : Springer US, 1991. http://dx.doi.org/10.1007/978-1-4899-0617-5_11.

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Fletcher, Paul D. I., et D. Parrott. « Water Droplet Coalescence Rates in Water-in-Oil Microemulsions ». Dans Reactions in Compartmentalized Liquids, 53–60. Berlin, Heidelberg : Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-642-74787-8_6.

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Hafsi, Zahreddine, Sami Elaoud, Manoranjan Mishra et Ines Wada. « Numerical Study of Droplets Coalescence in an Oil-Water Separator ». Dans Lecture Notes in Mechanical Engineering, 449–54. Cham : Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-52071-7_61.

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Ye, A., H. Singh et Y. Hemar. « Coalescence of oil droplets in oil-in-water emulsions formed with highly hydrolysed whey proteins as influenced by xanthan addition ». Dans Special Publications, 415–22. Cambridge : Royal Society of Chemistry, 2009. http://dx.doi.org/10.1039/9781847551214-00415.

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Liu, Bing, Qixuan Sun, Zhen Wu, Qun Gao, Haitao Zhao, Heng Guan, Lin Zhu, Lei Zhang, Mingxiu Yao et Xiaolong Xiao. « Research on the Factors Affecting the Collision and Coalescence of Microbubbles and Oil Droplets in a Rotating Flow Field ». Dans Advanced Manufacturing and Automation XII, 529–36. Singapore : Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-9338-1_64.

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Viraraghavan, T., H. K. Henning, F. Mourits et R. Ranganathan. « Coalescence/Filtration of Water-In-Oil Emulsions ». Dans Proceedings of the 43rd Industrial Waste Conference May 10, 11, 12, 1988, 435–40. CRC Press, 2018. http://dx.doi.org/10.1201/9781351076012-51.

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Boode, K., et P. Walstra. « Kinetics of Partial Coalescence in Oil-in-Water Emulsions ». Dans Food Colloids and Polymers, 23–30. Elsevier, 2005. http://dx.doi.org/10.1533/9781845698270.23.

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S√¶ther, √òystein, Johan Sj√∂blom et Stanislav Dukhin. « Droplet Flocculation and Coalescence in Dilute Oil-in-Water Emulsions ». Dans Food Emulsions. CRC Press, 2003. http://dx.doi.org/10.1201/9780203913222.ch5.

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Sakai, Toshio, Keiji Kamogawa, Fuminori Harusawa, Nobuyuki Momozawa, Hideki Sakai et Masahiko Abe. « Influence of Oil Droplet Size on Flocculation/Coalescence in Surfactant-Free Emulsion ». Dans Studies in Surface Science and Catalysis, 157–60. Elsevier, 2001. http://dx.doi.org/10.1016/s0167-2991(01)82058-9.

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Gupta, P. « Nanoemulsions : Preparation, Properties and Applications ». Dans Emerging Nanomaterials and Their Impact on Society in the 21st Century, 200–225. Materials Research Forum LLC, 2023. http://dx.doi.org/10.21741/9781644902172-9.

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In the last few decades, Nanoemulsions (NE) have gained significant interest among researchers because of their improved functional properties in comparison to emulsions. These include significant properties such as optical and rheological properties, coalescence, flocculation etc. It also shows excellent kinetic and thermodynamic stability. These NEs have been used in a variety of applications such as food, cosmetic and oil industries, preservatives, antimicrobial agent, in different drug delivery systems, cell culture technology etc. The chapter focuses on the various synthesis methods of Nanoemulsions. This will also provide insight about the important and useful properties. Applications in a variety of disciplines have also been discussed in detail.
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Actes de conférences sur le sujet "Oil coalescence"

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Mansouri, A., H. Arabnejad et R. S. Mohan. « Numerical Investigation of Droplet-Droplet Coalescence and Droplet-Interface Coalescence ». Dans ASME 2014 4th Joint US-European Fluids Engineering Division Summer Meeting collocated with the ASME 2014 12th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/fedsm2014-21642.

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The oil produced from offshore reservoirs normally contains considerable amount of water. The separation of water from oil is very crucial in petroleum industry. Studying the coalescence of two droplets or one droplet and interface can lead to better understanding of oil-water separation process. In this study, the coalescence of two droplets and droplet-interface are simulated using a commercial Computational Fluid Dynamics (CFD) code FLUENT 14. In order to track the interface of two fluids, two approaches, Volume of Fluid (VOF) and Level-Set method were utilized. The results are compared with experimental measurements in literature and good agreement was observed. The effect of different parameters such as droplet velocities, interfacial tension, viscosity of the continuous phase and off-center collision on the coalescence time has been investigated. The results revealed that coalescence time decreases as the droplet velocities increase. Also, continuous phase with higher viscosities and lower water-oil interfacial tension, increase the coalescence time.
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Hafskjold, Bjorn, Thomas B. Morrow, Harald K. B. Celius et David R. Johnson. « Drop-Drop Coalescence In Oil/Water Separation ». Dans SPE Annual Technical Conference and Exhibition. Society of Petroleum Engineers, 1994. http://dx.doi.org/10.2118/28536-ms.

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Xu, Haobo. « Poster : Droplet coalescence on oil-impregnated surfaces ». Dans 75th Annual Meeting of the APS Division of Fluid Dynamics. American Physical Society, 2022. http://dx.doi.org/10.1103/aps.dfd.2022.gfm.p0041.

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Yuan, Shuxia, Ramin Dabirian, Ram S. Mohan et Ovadia Shoham. « Simulation of Coalescence and Breakup of Dispersed Water Droplets in Continuous Oil Phase ». Dans ASME 2018 5th Joint US-European Fluids Engineering Division Summer Meeting. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/fedsm2018-83314.

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Petroleum industry uses shear devices such as chokes, valves, orifices and pumps, which cause droplet coalescence and breakup making the downstream separation process very challenging. Droplet-droplet coalescence leads to formation of larger droplets, which accelerate the phase separation, whereas the breakup of larger droplets into smaller ones delays the separation process. Computational Fluid Dynamic (CFD) simulations are conducted by ANSYS-Fluent software to track the droplet breakup and droplet-droplet coalescence, where the interfaces between the two phases are tracked by the Volume of Fluid (VOF) model. The material of droplet is water, while the continuous phase is oil. In this study, the effect of variables such as droplet diameter, droplet relative velocities as well as droplet motion directions on the time evolution of droplet-droplet coalescence and breakup is evaluated. The simulation results confirm that smaller droplet collisions lead to coalescence under wide ranges of droplet relative velocities, while larger droplet collisions result in droplet breakup at higher relative velocities. During coalescence, two droplets combine into one droplet, which deform in several times from one direction to orthogonal direction until recovering its shape or breakup. In addition, the simulation results show that fastest coalescence takes place when droplet collisions occur at optimum relative velocity, whereas droplet breakup occurs at higher velocities than the optimum velocity, and delay in coalescence happens at lower velocity. Furthermore, the simulation results clearly show that droplet moving direction play an important role in the occurrence of droplet coalescence and breakup. Comparison of the simulation results with the collected experimental data from literature confirm that the simulations are capable of predicting the evolution time of the droplet coalescence and breakup with high accuracy.
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Ortega, P., G. McGrath, G. Nunez et D. Joseph. « Device for Testing the Dynamic Stability of Highly Concentrated Emulsions against Coalescence ». Dans SPE International Thermal Operations and Heavy Oil Symposium. Society of Petroleum Engineers, 2001. http://dx.doi.org/10.2118/69729-ms.

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Raisin, J., P. Atten, F. Aitken et J. L. Reboud. « Electrically induced coalescence of two facing anchored water drops in oil ». Dans 2008 IEEE International Conference on Dielectric Liquids (ICDL 2008). IEEE, 2008. http://dx.doi.org/10.1109/icdl.2008.4622467.

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botti, talita, Marcio CARVALHO et Erick Quintella. « EFFECT OF INTERFACE RHEOLOGY ON DROP COALESCENCE IN WATER-OIL EMULSION ». Dans 18th Brazilian Congress of Thermal Sciences and Engineering. ABCM, 2020. http://dx.doi.org/10.26678/abcm.encit2020.cit20-0556.

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Adeyemi, Idowu, Nabil Kharoua, Mahmoud Meribout, Khalid AlHammadi et Lyes Khezzar. « Online Microwave Assisted Coalescence of Binary Water Drops in Crude Oil ». Dans 2022 International Conference on Electrical and Computing Technologies and Applications (ICECTA). IEEE, 2022. http://dx.doi.org/10.1109/icecta57148.2022.9990404.

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Widyaparaga, Adhika, Muhamad Hanif Ramadhan, Fakhri Ilham Faza, Reyhandy Bayu A. R., Naufal Imaduddin, Dyah Pribandaru N. et Gilang Prasetya Adi. « Induced oil droplet coalescence influence on watercut improvement of liquid-liquid cylindrical cyclone (LLCC) oil-water separator ». Dans ADVANCED MATERIALS : Proceedings of the International Workshop on Advanced Materials (IWAM-2017). Author(s), 2018. http://dx.doi.org/10.1063/1.5049978.

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Amarzguioui, Morad, et Per Christian Jacobsen. « Novel use of Electro Coalescence to Enhance, Optimize and Debottleneck Oil Separation Trains ». Dans SPE Annual Technical Conference and Exhibition. Society of Petroleum Engineers, 2015. http://dx.doi.org/10.2118/174763-ms.

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