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Showing 1 to 20 of 133 for “"Interfacial tension"”.
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Interfacial tension by pendant drops
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1938.
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INTERFACIAL TENSION MEASUREMENT BY SESSILE DROP USING DIGITAL IMAGE PROCESSING
… the displacement of oil is most effective at low interfacial tensions, usuall below 10$\sp{-2}$ dyne/cm. This condition can be achieved by surfactant or chemical flooding but requires accurate modeling of reservoir conditions and determination of interfacial tensions, IFTs. The spinning drop …
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Experimental investigation of interfacial tension in two-phase system involving methane and water
… of reservoir fluids such as viscous and interfacial forces is critical in many oil and gas, petrochemical, and other related industries. In oil and gas industry, the production, transportation and processing of hydrocarbon fluids involve dealing with the multiphase system. Viscosity and …
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Low Interfacial Tension Foam Miscible Ethane Oil Recovery in Low Permeability Harsh Environments
… work presents a laboratory investigation of low interfacial tension miscible ethane foam enhanced oil recovery in low permeability, heterogeneous, harsh environments (<15md, 136,000ppm total dissolved solids with divalent ions, 74°C). Minimum miscibility pressure displacement tests were performed …
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A Study of Factors Influencing the Interfacial Tension Between Heptane and Solutions of Lipoproteins
Made available in DSpace on 2014-12-05T19:37:01Z (GMT). No. of bitstreams: 1 5900528.pdf: 3731583 bytes, checksum: 2114a990b3487433bfdf266cb01f0b0d (MD5) Previous issue date: 1958
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The effect of interfacial tension on the rate of mass transfer in ternary liquid-liquid extraction
… the qualitative nature of the interracial tension equilibrium characteristics of the systems hexane-acetone-water and toluene-acetone-water by studying the effect of drop velocity on drop weight through use of the modified drop weight procedure, and comparing these results with those …
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Experimental investigation of the effect of nanoparticles and polymer on interfacial tension between oil and water during Enhanced Oil Recovery (EOR)
… research study experimentally investigates the interfacial tension (IFT) of silica/gum-Arabic) in the presence brine at different temperature to enhanced and improve oil recovery. The study also investigate experimentally the pH value of brine and in combination with nanoparticles and polymer …
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The Roles of Dissolution, Coalescence, and Interfacial Tension in the Formation and Stability of Extremely Fine Water Drops in Concentrated Bitumen Solutions
In this thesis, we investigate the formation and stability of extremely fine water drops (
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Measurement and modeling of fluid-fluid miscibility in multicomponent hydrocarbon systems
… hydrocarbon systems. A promising new vanishing interfacial tension (VIT) experimental technique has been further explored to determine fluid-fluid miscibility. Interfacial tension measurements have been carried out in three different fluid systems of known phase behavior characteristics using …
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Characterization of surfactant adsorption at a liquid-liquid interface by drop volume tensiometry
… washing or flushing processes. Dynamic interfacial tension measurements can be useful in describing the adsorption behavior of surfactants at liquid-liquid interfaces. In this work, selected surfactants are tested at the mineral oil-water interface using a drop volume tensiometer. A …
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Carbon Dioxide-Lubricant Two-Phase Flow Patterns in Small Horizontal Wetted Wall Channels: The Effects of Refrigerant/lubricant Thermophysical Properties
… liquid density, liquid viscosity, and interfacial tension of lubricant-refrigerant mixtures. For the first time, interfacial tension measurements for refrigerant-lubricant mixtures over the range of concentrations from neat lubricant to pure refrigerant have been measured and published. …
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Visualization of water/oil displacement in porous media in the presence of chemical reaction.
In enhanced oil recovery, low interfacial tension, optimum wettability condition, high pH value, and the electric charge density at the interface can improve the oil recovery percentage appreciably. However, the addition of sodium hydroxide changes the interfacial tension to an ultra-low value. …
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Improving Impact Properties of Novatein through Polymer Blending and Reactive Extrusion
… choice of polymer, composition, viscosity ratio, interfacial tension and chemical interactions. Novatein was blended with either elastomeric core-shell particles, polyethylene (PE), or biodegradable polybutylene adipate-co-terephthalate (PBAT) using twin-screw extrusion to allow for sufficient …
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Optical Deformation of Emulsion Droplets
… been demonstrated for systems with ultra-low interfacial tension. A disadvantage of the systems used was the strong temperature-dependence of the interfacial tension. I have explored options for creating temperature-insensitive microemulsions, and have shown that a mixed surfactant system …
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The role of surfactants in the leaching of zinc sulphide minerals at temperatures above the melting point of sulphur
… surfactants on the liquid sulfur-aqueous system interfacial tensions and the liquid sulfur-mineral contact angle were measured in a high temperature-high pres-sure apparatus. In the absence of any surfactant, the liquid-liquid interfacial tension measured 54±1 mN/m, and the liquid sulfur-mineral …
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INVESTIGATION OF CARBON DOTS BEHAVIOR: DIFFUSIOPHORESIS AND INFLUENCE ON THE OIL-WATER INTERFACES
… within solvent gradients and their influence on interfacial tension and surface wettability.In this study, stable carbon dots (CDs), 4-10 nm in size with -7 mV zeta potential, have been synthesized through pyrolysis of citric acid and ethanolamine. The diffusiophoretic behavior of CDs was …
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Fluidization and Segregation in Confluent Models for Biological Tissues
… or size is insuffcient to induce an emergent interfacial tension, and this leads to large-scale mixing. However, shape disparity can induce a small-scale demixing over a few cell diameters. We report a very similar de-mixing observed in an experimental co-culture of differently shaped …
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Effects of Flow Rate and Droplet Size on Double Emulsion Morphology
… on the spreading factors that depend on the interfacial tension between two fluids. The possible morphologies are complete engulfment, partial engulfment, and no coalescence. The experimental study utilized an acrylic tube filled with water where an air bubble and oil droplet were injected …
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Application of surfactant-polymer enhanced oil recovery in a high- salinity, high-temperature carbonate reservoir
… (SP). In SP flooding, a surfactant reduces the interfacial tension between oil and water to ultra low values, allowing residual oil to be mobilized and recovered. On the other hand, polymer increases the viscosity of the SP slug, thus providing better sweep efficiency than waterflooding. This …
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A Study of Transport of Micellar Fluids in Porous Media
… permeabilities have been measured for a low interfacial tension brineoil- surfactant-alcohol mixture in a Berea sandstone core. The measurements were done at steady-state with a constant nominal capillary number of 10^-2. Residual phase saturation (capillary desaturation curve) and endpoint …
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