(440e) Antifoams in Diesel Fuels: Thin Liquid Film Dynamics and Antifoam Mechanisms
AIChE Annual Meeting
Wednesday, November 10, 2021 - 9:00am to 9:15am
Motivated by this goal, here we investigate foaming and antifoam mechanics of diesel fuels, when mixed with two different families of antifoam additives (Organo-modified Silicone and an ashless chemistry) at different antifoam concentrations and droplet size distributions. These ashless antifoams are a potential replacement for ash containing silicones. We utilize a custom experimental technique that allows us to study thin film dynamics and foam stability on a single bubble level, and which correlates to bulk foam behavior. Our results indicate that solutocapillary flows, specifically those caused by evaporation of individual components, are important in stabilizing diesel fuel foams. In addition, these single bubble analyses lead to insights into mechanism of action for foam destabilization and rupture, allowing better understanding of foaming dynamics for each diesel-antifoam combination.