Results 31 to 40 of about 979,553 (324)

Effects of CO2-foam stability, interfacial tension and surfactant adsorption on oil recovery by alkaline-surfactant-alternated-gas/CO2 flooding

open access: yes, 2020
In this study, experimental investigations were carried out to develop optimum chemical formulations for alkaline-surfactant-alternated-gas/CO2 (ASAG) flooding based on the combined effect of forming strong/stable foam, achieving ultra-low interfacial ...
R. Phukan, S. B. Gogoi, P. Tiwari
semanticscholar   +1 more source

Performance improvement of ionic surfactant flooding in carbonate rock samples by use of nanoparticles

open access: yesPetroleum Science, 2016
Various surfactants have been used in upstream petroleum processes like chemical flooding. Ultimately, the performance of these surfactants depends on their ability to reduce the interfacial tension between oil and water.
Mohammad Ali Ahmadi, James Sheng
doaj   +1 more source

The Improvement of Natural Thai Bentonite Modified with Cationic Surfactants on Hexavalent Chromium Adsorption from an Aqueous Solution

open access: yesAdsorption Science & Technology, 2022
This work was performed to evaluate the adsorption properties of modified Thai bentonites (MTBs) on hexavalent chromium (Cr(VI)) by using a popularly capable surfactant (hexadecyltrimethylammonium bromide (HDTMA)) compared to an alternative surfactant ...
Nikom Srikacha   +4 more
doaj   +1 more source

Phase-field modeling droplet dynamics with soluble surfactants [PDF]

open access: yes, 2010
Using lattice Boltzmann approach, a phase-field model is proposed for simulating droplet motion with soluble surfactants. The model can recover the Langmuir and Frumkin adsorption isotherms in equilibrium.
Liu, H., Zhang, Y.H.
core   +1 more source

A Structural Comparison of Ordered and Non-Ordered Ion Doped Silicate Bioactive Glasses [PDF]

open access: yes, 2020
One of the key benefits of sol-gel-derived glasses is the presence of a mesoporous structure and the resulting increase in surface area. This enhancement in textural properties has a significant e ect on the physicochemical properties of the materials.
Beltrán, Ana M.   +3 more
core   +2 more sources

Influence of liquid surface tension (surfactants) on bubble formation at rigid and flexible orifices [PDF]

open access: yes, 2004
The influence of liquid surface tension on the bubble formation from both rigid and flexible orifice has been investigated. The liquid phases under test are aqueous solutions with butanol or surfactants (cationic, non-ionic and anionic); static and ...
Hebrard, Gilles, Loubière, Karine
core   +3 more sources

Application of Novel Colloidal Silica Nanoparticles in the Reduction of Adsorption of Surfactant and Improvement of Oil Recovery Using Surfactant Polymer Flooding

open access: yesACS Omega, 2021
Surfactant polymer flooding is one of the most common chemical enhanced oil recovery techniques, which improves not only the microscopic displacement of the fluid through the formation of the emulsion but also the volumetric sweep efficiency of the fluid
H. Kesarwani   +2 more
semanticscholar   +1 more source

Direct Resolution of the Interactions of a Hydrocarbon Gas with Adsorbed Surfactant Monolayers at the Water/Air Interface Using Neutron Reflectometry

open access: yesColloids and Interfaces, 2022
We have directly resolved in the present work the interfacial composition during and after the interactions of a saturated atmosphere of oil vapor with soluble surfactant solutions at a planar water/air interface for the first time.
Richard A. Campbell   +4 more
doaj   +1 more source

Surface modification of PDMS based microfluidic systems by tensides [PDF]

open access: yes, 2013
The material aspects of a polymer based microfluidic structure were characterised considering the compatibility of the system with bioanalytical applications.
Fekete, Zoltán   +2 more
core   +1 more source

Enhancing surfactant desorption through low salinity water post-flush during Enhanced Oil Recovery

open access: yesOil & Gas Science and Technology, 2021
Low Salinity Water (LSW) incorporates in surfactant Enhanced Oil Recovery (EOR) as a pre-flush is a common practice aiming to reduce the formation salinity, which affects surfactant adsorption.
Ngo Ichhuy   +4 more
doaj   +1 more source

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