Effect of Antifoam Concentration on Volumes of Foam Generated by Air Entrainment in Aqueous Solutions

• Published in: Science of Defoaming - Theory, Experiment and Applications pp. 336 - 369
• Main Author: Garrett, Peter R.
• Format: Book Chapter
• Language: English
• Published: United Kingdom CRC Press 2014; Taylor & Francis; Taylor & Francis Group
• Subjects: Chemistry & Chemical Engineering; Industrial chemistry; Industrial Chemistry & Chemicals; Physical chemistry; Antifoam Action; Foam Film Rupture; Pseudoemulsion Film; Radius Rb; Bubble Size; Antifoam Dispersions; Plateau Borders; Air Water Surface; Reynolds Equation; Antifoam Concentration; Foam Height; Antifoam Effectiveness; Foam Volume; Antifoam Behavior; Surfactant Solution; Foam Generation; Capillary Pressure; AF AF; Foam Film; Bubble Size Distribution; Antifoam Drop; Gas Phase Volume Fraction; Excluded Volume Effect; Foam Column; Antifoam Effects
• ISBN: 1420060422; 9781420060423; 1420060414; 9781420060416
• DOI: 10.1201/b15158-8

For a given antifoam-surfactant solution combination, the main practical concern is simply to ensure that sufficient antifoam is present to produce the desired diminution in foam volume given the nature and intensity of the relevant aeration processes involved. If this is to be achieved with a minimal level of empiricism, some knowledge of the relation between antifoam concentration and foam volume under given conditions of foam generation is required. Despite the evident importance of this fundamental aspect of antifoam behavior, there have been relatively few attempts to understand it [1]. This of course derives from the complexity that we have shown characterizes the overall process of antifoam action on foam volume. We may, however, derive useful generalizations if we make some simple, but realistic, assumptions.