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    Effect of organic surfactant additives on gas holdup in the pseudo-homogeneous regime in bubble columns equipped with fine pore sparger

    Year: 2010

    Journal: Chemical Engineering Science, Volume 65, Issue 22, 15 November 2010, Pages 5872-5880, 20111221

    Authors: A.D. Anastasiou, N.A. Kazakis, A.A. Mouza n , S.V. Paras

    Organizations: Department of Chemical Engineering, Aristotle University of Thessaloniki, Univ. Box 455, GR 54124 Thessaloniki, Greece

    New experimental data concerning the gas holdup in bubble columns equipped with porous sparger were acquired. The effect of surfactant additives on gas holdup in the pseudo-homogeneous regime has been studied. Three different commercial surfactants (Triton X-100®, SDS®, CTAB®) were used and four aqueous solutions of each one were employed, in order to study the effect of the surfactant concentration and type (i.e., non-ionic, anionic, cationic). A general correlation, which includes dimensionless numbers (i.e., Froude, Archimedes and Bond) as well as the geometric characteristics of the column and the sparger, can predict the gas holdup in various systems (i.e., pure substances, ionic surfactants, non-ionic surfactants) with reasonable accuracy.