Measurement and modelling of the dynamic adsorption of flotation collectors and frothers at the gas-liquid interface

Phan, Chi, Nguyen, A. V. and Evans, G. M. (2007). Measurement and modelling of the dynamic adsorption of flotation collectors and frothers at the gas-liquid interface. In: Engineers Australia Staff, 32nd Australasian Chemical Engineering Conference (CHEMECA 2004). CHEMECA 2004: Sustainable processes, Sydney, Australia, (). 26-29 Sepember 2004.


Author Phan, Chi
Nguyen, A. V.
Evans, G. M.
Title of paper Measurement and modelling of the dynamic adsorption of flotation collectors and frothers at the gas-liquid interface
Conference name CHEMECA 2004: Sustainable processes
Conference location Sydney, Australia
Conference dates 26-29 Sepember 2004
Proceedings title 32nd Australasian Chemical Engineering Conference (CHEMECA 2004)
Place of Publication Red Hook, N.Y.
Publisher Curran Associates
Publication Year 2007
Sub-type Fully published paper
ISBN 9781604233278
1604233273
Editor Engineers Australia Staff
Language eng
Abstract/Summary Surfactants are used to control the interfacial properties of the gas-liquid and liquid-solid interfaces in flotation. This paper investigates the dynamic adsorption of surfactants at the gas-liquid interface. The dynamic adsorption process was modeled by considering the surfactant mass transfer to the gas-liquid interface by diffusion and the Langmuir and Frumkin adsorption isotherms. The numerical computation was applied to solve the non-linear governing equations. The dynamic adsorption was measured in terms of the dynamic surface tension using the pendant drop method. The theoretical models were compared against the experimental data obtained with non-ionic (Dowfroth 250) and ionic (sodium dodecylbenzene sulfate, SDBS) surfactants. The theoretical results agreed well with the experimental data for SDBS, but not for Dowfrother 250, especially for the initial stage. Reasons for the variation in results are given in the paper.
Subjects 0904 Chemical Engineering
Q-Index Code EX
Additional Notes Presented as "Paper 131: Dynamic Adsorption of Surfactants at the Gas-Liquid Interface" during "Session B2: Chemical Engineering Fundamentals"

 
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