Wet foam is a complex fluid consisting of bubbles dispersed in a liquid-phase, with a volume fraction of the gas-phase can be up to 97 vol.%. Foam stability is significantly enhanced in the presence of nanoparticles opening opportunities for new applications such as enhanced oil recovery and remediation of contaminated sites. However, the mechanisms of particle-bubble interaction in porous media are not well understood and current models do not capture the overall multi-phase fluid flow and transport dynamics. Here, a study on the modeling and monitoring of the generation and evolution of a foam in porous media is presented. Experiments at the pore-scale were carried out and used to derived a constitutive equation of foam generation [1]. The mathematical equation was then coupled with a model of foam and nanoparticle transport in porous media [2] and used to describe laboratory tests at the continuum scale [3]. Anionic and cation surfactants combined with bare and functionalized nanoparticles were used to stabilized the foam. Measurements show that generation mechanism is not affected by the presence of nanoparticles; whereas the stability is remarkably enhanced in as much as the viscosity. Improving therefore the mobility control of the foam as well as of the nanoparticles. These  results suggest that foam bubbles could be therefore used a carrier of nanoparticles in applications such as remediation of contaminated sites, where reactive particulate must be delivered to trigger reactions.

Combining nanoparticles and foam transport in porous media for contaminated site remediation

Macromolecular Chemistry: The Second Century

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ACS Spring 2020 National Meeting & Expo

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.