Abstract
In alkaline-surfactant-polymer flooding processes, the adsorption of residual surfactants in the oil/water interface significantly affected the emulsification and stabilization of produced water. In order to thoroughly investigate the effect of that on oil-water separation efficiencies, the adsorption behaviors of a surfactant, sodium dodecylbenzene sulfonate (SDBS) were carried out by using both molecular simulation and experimental approaches. The effects of temperature on the stability of monolayer SDBS films, and the interfacial film thicknesses and interface formation energies of SDBS at n-dodecane/water interface, were obtained and then compared with the tested values of adsorption heat of the surfactant within the simulated produced water samples and with experimentally-determined interfacial tensions of the samples. The experimental and computational results are consistent in the variation of adsorption heat.
Published Version
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