The effect of bubble approach velocity and surfactants on coalescence of bubbles.

0551318 - ÚCHP 2022 GR eng C - Konferenční příspěvek (zahraniční konf.)
Orvalho, Sandra - Stanovský, Petr - Zedníková, Mária - Růžička, Marek
The effect of bubble approach velocity and surfactants on coalescence of bubbles.
Book of Abstracts. Poster Presentations. Athens: -, 2021, s. 156, č. článku EP3.65. ISBN N.
[Conference of the European Colloid and Interface Society (ECIS) /35./. Athens (GR), 05.10.2021-10.10.2021]
Grant CEP: GA ČR(CZ) GA19-09518S
Institucionální podpora: RVO:67985858
Klíčová slova: coalescence * bubble * surfactants
Obor OECD: Chemical process engineering
https://c148fa72-bfab-4074-9314-7134225d516f.filesusr.com/ugd/8c566f_b8d2e650e7434b94b2849ff4af63a84d.pdf

The coalescence of bubbles and drops is a very important phenomenon in multiphase flow systems, which controls the bubble size distribution and the interfacial area available for heat and mass transfer in multiphase reactors. In the present communication, we will resume the results of our observations of the coalescence of bubbles in surfactant solutions, at controlled approaching velocity
between bubbles. Experiments were performed using high speed visualization of the life span of pairs of bubbles. Detailed study of the dependency of the coalescent efficiency, the contact time till coalesce and the transition concentration, on the dynamics of adsorption of the surfactant molecule
present in the solution and the state of contamination of the bubbles at the moment of contact. Experiments were done with five nonionic surfactants covering wide range of adsorption dynamics characteristics.
Trvalý link: http://hdl.handle.net/11104/0326742