Modeling of bubble coalescence in saline water in the presence of flotation frothers

Wang, Liguang (2015) Modeling of bubble coalescence in saline water in the presence of flotation frothers. International Journal of Mineral Processing, 134 41-49. doi:10.1016/j.minpro.2014.11.008


Author Wang, Liguang
Title Modeling of bubble coalescence in saline water in the presence of flotation frothers
Journal name International Journal of Mineral Processing   Check publisher's open access policy
ISSN 0301-7516
Publication date 2015-01-10
Year available 2014
Sub-type Article (original research)
DOI 10.1016/j.minpro.2014.11.008
Open Access Status
Volume 134
Start page 41
End page 49
Total pages 9
Place of publication Amsterdam, The Netherlands
Publisher Elsevier BV
Collection year 2015
Language eng
Formatted abstract
This paper proposes a model based on the capillary wave theory of Valkovska, Danov and Ivanov to predict the lifetimes (τ) of small foam films confined between air bubbles in saline water containing flotation frothers such as sodium dodecyl sulfate (SDS), polypropylene glycol (PPG) with a molecular weight of 400, and methyl isobutyl carbinol (MIBC). The model considers the important issues of intersurface force, bubble size, surface tension, and film radius. The predicted τ values of these foam films were compared to the experimental ones. Under the assumption of tangentially immobile film surfaces, excellent agreement between model and experiment for τ was obtained for SDS and PPG, whereas τ was slightly under-predicted for MIBC. The model can be improved by adding an adjustable parameter that is related to the lateral diffusion constant and surface concentration of frother molecules at the air/water interface.
Keyword Froth stability
Surfactants
Foam film
Surface force
Disjoining pressure
Surface mobility
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Available online: 21 November 2014.

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
Official 2015 Collection
 
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Citation counts: TR Web of Science Citation Count  Cited 5 times in Thomson Reuters Web of Science Article | Citations
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Created: Thu, 27 Nov 2014, 10:01:56 EST by Dr Liguang Wang on behalf of School of Chemical Engineering