Dissertations / Theses on the topic '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.
Full textEow, John Son. "Electrostatic enhancement of coalescence of water drops in oil." Thesis, University of Surrey, 2002. http://epubs.surrey.ac.uk/842815/.
Full textJayarajah, 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.
Full textTeare, Declan O. H. "Cross-linked 'silicone oil'/water emulsions." Thesis, University of Bristol, 1997. http://hdl.handle.net/1983/0b48bef9-20fa-4ff4-a903-94c567606303.
Full textKufås, 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.
Full textAngle, 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.
Full textNassif, 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.
Full textDans 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.
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.
Full textKulkarni, 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.
Full textSrđan, 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.
Full textThe 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.
Yao, Juncheng. "Characterization and Prediction of Water Droplet Size in Oil-Water Flow." Ohio University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1470741069.
Full textKibboua, Rachid. "Etude d'une dispersion liquide-liquide soumise à un écoulement cisaillé simple : caractérisation vis à vis de la coalescence." Université Joseph Fourier (Grenoble), 1994. http://www.theses.fr/1994GRE10167.
Full textBrassieur, David Aaron. "An Investigation Into the Origin, Composition, and Commercial Significance of a Sedimentary Subsalt Formation: Keathley Canyon, Gulf of Mexico." ScholarWorks@UNO, 2016. http://scholarworks.uno.edu/td/2245.
Full textDeshpande, Kiran B. "Studies On Phase Inversion." Thesis, Indian Institute of Science, 2001. http://hdl.handle.net/2005/285.
Full textWallau, W., Rajnikant Patel, Iqbal M. Mujtaba, and Harvey Arellano-Garcia. "Electric field driven separation of oil-water mixtures: model development." 2014. http://hdl.handle.net/10454/10808.
Full textCoalescence enhancement of water droplets in oil emulsions is commonly contemplated for the separation of an aqueous phase dispersed in a dielectric oil phase with a considerably lower dielectric constant than that of the dispersed phase. The characteristics and geometry of the electrode system have a large impact on the performance of an electrostatic coalescer and are actually strictly linked to the type of the applied electric field and the emulsion used. Furthermore, addition of chemicals and heating has also been revealed to further enhance the electrocoalescence of water droplets. In this work, the coalescence of two water drops sinking in a dielectric oil phase at an applied high voltage, pulsed dc electric field, in particular with regards to the effects of pressure and temperature on coalescence performance is investigated. The developed model should help to recognise and prove approaches to electrocoalescence mechanisms, the dispersion flow direction with respect to the applied electric field, as well as the electric field configuration.
TRAPANI, SERENA. "Methods and Indices for Monitoring and Optimization of Extra Virgin Olive Oil Production." Doctoral thesis, 2016. http://hdl.handle.net/2158/1037682.
Full text(11113473), Cole R. Davis. "Relating the Formation Mechanisms and Kinetic Stability of Complex Shipboard Emulsions to the Physical and Chemical Properties of Model Surfactant-Oil-Water-Salt Systems." Thesis, 2021.
Find full textEmulsions are advantageous in many applications including healthcare, food science, and detergency due to their ability to disperse one fluid in another, otherwise immiscible fluid. For the same reason, emulsions are also problematic when mixtures of oil and water are undesirable like in industrial wastewater pollution and fuel systems. Whether an emulsion is desirable or not, both benefit from understanding the fundamental relationship of emulsion formation and stability to the physical and chemical properties of the oil-water-surfactant mixture. This work identifies the formation and stability mechanisms of model emulsion systems through the perspective of emulsion prevention for applications in shipboard wastewater (bilge water) treatment. Although experiments in this study were designed to model bilge water systems, their fundamental approach makes them practical for many different applications like food science, pharmaceuticals, and detergency.
The impact of salts on emulsion formation and stability to coalescence were studied to understand how emulsions stabilized by ionic surfactant behave in saltwater environments. Droplet size analysis revealed that emulsion stability to coalescence improved with salt concentration. Through interfacial tension and zeta potential measurements, it was found that the addition of salt promoted close surfactant packing and faster surfactant adsorption kinetics at the oil-water interface. This aided in preventing coalescence and created conditions favorable for the formation of a stable Newton black film. Extended DLVO calculations were used to model the interaction energy between droplets and suggested that hydration forces play an important role in stabilizing these systems. These emulsions were then studied under dynamic ageing conditions to observe the impact of motion on emulsion stability. While statically aged emulsions were stable to coalescence, dynamic ageing induced coalescence (increased droplet size) or emulsified the oil droplets (decreased droplet size) depending on the surfactant concentration and energy input during ageing.
Formation mechanisms and stability of spontaneous emulsion systems were also investigated. Low molecular weight oils (e.g., toluene, xylenes, and cyclohexane) were found to spontaneously emulsify with nonylphenol polyethoxylated (NPE) and sodium dodecylbenzene sulfonate (SDBS). NPE emulsions spontaneously emulsified via diffusion and micelle swelling and displayed limited stability due to Ostwald ripening. SDBS emulsions also spontaneously emulsified with toluene but only in saltwater environments. As the concentration of salt in the aqueous phase increased, the spontaneity of these emulsions also increased. These systems were analyzed using the hydrophilic lipophilic difference (HLD) theory to evaluate its efficacy for predicting the conditions favorable for spontaneous emulsification. Limitations and practicality of using the HLD model for these systems were also explored.