Natural Gas Foam Stabilization by a Mixture of Oppositely Charged Nanoparticle and Surfactant and the Underlying Mechanisms
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2018-08-29
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Abstract
This study investigates the adsorption of sodium fatty alcohol polyoxyethylene ether sulfate surfactant (AES) on oppositely charged alumina-coated silica nanoparticle (SNOWTEX-AK), then the influence of surfactant and nanoparticle concentration on the stability of methane foam is described. It is found that the affinity of nanoparticle for the gas-liquid interface is strongly affected by the adsorption of surfactant on the surface of nanoparticles. Five adsorption stages, which are described in terms of the extent and type of surfactant coverage of the nanoparticles, explain the behavior of the solution at different surfactant/nanoparticle ratios. The most stable foam was found at small surfactant/nanoparticle ratios, at which the particles are partially covered with surfactants and have smaller aggregate size. For the surfactant concentration around CMC, the foam half-life at this synergistic concentration ratio range was found at least two times more than that of the foam stabilized solely by surfactants.
The findings from this study provide a better understanding of the interaction between oppositely charged nanoparticle/surfactant pairs and how that interaction affects the foam stability.
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Doroudian Rad, M. (2018). Natural Gas Foam Stabilization by a Mixture of Oppositely Charged Nanoparticle and Surfactant and the Underlying Mechanisms (Master's thesis, University of Calgary, Calgary, Canada). Retrieved from https://prism.ucalgary.ca. doi:10.11575/PRISM/32884