Interfacial tension between immiscible liquids in the system K2O-FeO-Fe2O3-Al2O3-SiO2 and implications for the kinetics of silicate melt unmixing

2010 ◽  
Vol 95 (11-12) ◽  
pp. 1679-1685 ◽  
Author(s):  
I. V. Veksler ◽  
J. Kahn ◽  
G. Franz ◽  
D. B. Dingwell
Keyword(s):  
Interfacial Tension ◽  
Silicate Melt ◽  
Immiscible Liquids ◽  
Kinetics Of

scholarly journals A novel experimental approach for studying spontaneous imbibition processes with alkaline solutions

2019 ◽  
Vol 89 ◽  
pp. 04004
Author(s):  
T. Chevalier ◽  
J. Labaume ◽  
A. Delbos ◽  
T. Clemens ◽  
V. M. Waeger ◽  
...  
Keyword(s):  
Interfacial Tension ◽  
Alkaline Solution ◽  
Recovery Process ◽  
Oil Field ◽  
Spontaneous Imbibition ◽  
Alkaline Solutions ◽  
Vienna Basin ◽  
Natural Surfactants ◽  
Current Flows ◽  
Kinetics Of

Spontaneous imbibition processes can play an important role in oil production. It can be enhanced or influenced by wettability changes generated by properly designed chemicals or by the natural surfactants resulting from reactive crude oils in the presence of alkaline solutions. The reaction of basic salts with some components of oil can, indeed, lead to the formation of natural soaps that reduces the interfacial tension between oil and brine. The latter scenario is studied herein on samples and oil from the St Ulrich oil field in the Vienna basin. To that end, spontaneous imbibition experiments were performed with two brines differing by the absence or presence of alkali. We first present a general novel technique to monitor saturation changes on small rock samples for the purpose of assessing the efficiency of a given recovery process. Samples of only 15 mm in diameter and 20 mm in length and set at irreducible saturation were fully immersed in the solution of interest, and the evolution of the samples’ saturation with time was monitored thanks to a dedicated NMR technique involving the quantification of the sole oil phase present within the sample. A fully-3D imbibition configuration was adopted, involving counter-current flows through all faces of the sample. The experimental method is fast for two reasons: (i) the kinetics of capillary imbibition process is proportional to the square of sample size, i.e. very rapid if accurate measurements can be acquired on tiny samples, (ii) the present 3D situation also involves faster kinetics than the 1D configuration often used. The NMR technique was crucial to achieve such conditions that cannot be satisfied with conventional volumetric methods. The kinetics of oil desaturation during spontaneous imbibition is interpreted with the help of an analytical 3D diffusion model. For the alkaline solution, the diffusion coefficient is reduced by a factor of only two compared to the non-alkaline brine, although the interfacial tension between the oil and the imbibing solution is reduced by a factor of 10. Hence, a wettability change to a more water wet state has to be assumed when the alkaline solution replaces the non-alkaline solution in the imbibition process. However, no significant impact on the final saturation was observed.

Measurement of interfacial tension of immiscible liquids of equal density

AIChE Journal ◽  
1988 ◽  
Vol 34 (1) ◽  
pp. 155-157 ◽  
Author(s):  
S. B. Reddy Karri ◽  
V. K. Mathur
Keyword(s):  
Interfacial Tension ◽  
Immiscible Liquids ◽  
Equal Density

Kinetics of Dendritic Precipitation of Cristobalite from a Potassium Silicate Melt

1973 ◽  
Vol 56 (11) ◽  
pp. 557-561 ◽  
Author(s):  
N. H. CHRISTENSEN ◽  
A. R. COOPER ◽  
B. S. RAWAL
Keyword(s):  
Potassium Silicate ◽  
Silicate Melt ◽  
Kinetics Of

Kinetics of Triton-X100 Transfer Across the Water/Dodecane Interface: Analysis of the Interfacial Tension Variation

2012 ◽  
Vol 116 (24) ◽  
pp. 13152-13160 ◽  
Author(s):  
Pierre-Marie Gassin ◽  
Gaelle Martin-Gassin ◽  
Daniel Meyer ◽  
Jean-François Dufrêche ◽  
Olivier Diat
Keyword(s):  
Interfacial Tension ◽  
Interface Analysis ◽  
Triton X100 ◽  
Kinetics Of

scholarly journals Синтез полистирольных суспензий в условиях получения эмульгатора на границе раздела фаз

2015 ◽  
Author(s):  
Dinara Adikanova ◽  
Gulzhakhan Yeligbayeva ◽  
Erengaip Shaikhutdinov ◽  
Inessa Gritskova
Keyword(s):  
Interfacial Tension ◽  
Phase Boundary ◽  
Aqueous Phase ◽  
Phase 1 ◽  
Volume Ratio ◽  
Narrow Particle Size Distribution ◽  
Diagnostic Kits ◽  
The Moment ◽  
Protein Cell ◽  
Kinetics Of

<p>Emulsion polymerization of styrene was investigated using as an emulsifier the salts of stearic and lauric acids with cations of different metals (K<sup>+</sup>, Li<sup>+</sup>, Ba<sup>2+</sup>, Ca<sup>2+</sup>, Zn<sup>2+</sup>).</p><p>The emulsifier was injected in two ways: using ready salts entered into the aqueous phase (1) or salts formed at the phase boundary of monomer/water at the moment of polymerization (2).</p><p>The second method of injection of the emulsifier proved to be more effective. In this case, there was a significant reduction in the interfacial tension which promotes intense microemulsification of monomer.</p><p>The kinetics of the polymerization were studied by the method of dilatometry. Interfacial tension at the phase boundary monomer/water was measured by  stalagmometric method. The sizes of the particles of polymer suspensions were determined by electrophoretic light scattering.</p><p>It is shown that the polystyrene suspension with narrow particle size distribution and with diameter of 0.2 microns can be obtained using as an emulsifier 0.5% of lithium stearate in the conditions of its synthesis at the phase boundary, with a volume ratio of the monomer/aqueous phase of 1:10, the concentration of the initiator - 0.1%.</p><p>Monodispersed granules of polystyrene suspensions with diameter of 0.2 microns are highly promising as carriers of protein cell to create diagnostic kits for various diseases.</p>

Dynamic aspects of liquid interfaces

Surfactants ◽  
2019 ◽  
pp. 113-129
Author(s):  
Bob Aveyard
Keyword(s):  
Interfacial Tension ◽  
Shape Change ◽  
Elastic Response ◽  
Relaxation Processes ◽  
Surfactant Adsorption ◽  
Liquid Interfaces ◽  
Area Change ◽  
Surfactant Solutions ◽  
Viscoelastic Modulus ◽  
Kinetics Of

Following the rapid formation of the surface of a surfactant so′′lution, the dynamic interfacial tension falls with time as a result of the finite time needed for surfactant adsorption. Surfaces can either be sheared (involving shape change) or dilated (area is changed), and both these processes can give a viscous and/or elastic response. Usually, surfaces of surfactant solutions exhibit a combination of the two and are viscoelastic. If small sinusoidal area changes are imposed on the surface, changes in tension and area are out of phase because surfactant adsorption is relatively slow. The responses to area change are frequency dependent. The complex dilational viscoelastic modulus, ε‎*, has real (elastic) and imaginary (viscous) parts, ε‎′ and ε‎′′, respectively, whose variation with frequency provides insights into relaxation processes occurring at the surface. The way in which dynamic tensions can give insights into the kinetics of surfactant adsorption is explained.

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