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Surfactant Recovery by Foam Fractionation using the Gas-Liquid Contactor, Emulsion Venturi

Abstract : Sodium dodecylbenzene sulfonate (SDBS), an anionic surfactant, was removed from its aqueous solution by foam fractionation in an emulsion venturi, a gas-liquid contactor functioning in self-aspiration. The performance of the reactor was evaluated by measuring the self-aspired gas flow and the mass transfer coefficient in the presence and the absence of SDBS. Data confirmed that both the gas flow self-aspired and the mass transfer coefficient increased with increasing the recirculated liquid flow. However, the presence of SDBS decreased the mass transfer capacity of the reactor influencing self-aspiration capacity in a positive manner. The percentage removal of SDBS in the emulsion venturi increased with increasing the recirculated liquid flow; at the highest liquid flow value used in this work (1.4m(3)/h), 96% of SDBS was removed from the solution after 20min of foam operating. The process was dependant on initial surfactant concentration. Neutral pH and temperature of 25 degrees C were the optimal conditions for the foam separation of SDBS in the emulsion venturi.
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https://hal.univ-lorraine.fr/hal-01597790
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Submitted on : Thursday, September 28, 2017 - 5:19:09 PM
Last modification on : Wednesday, October 10, 2018 - 4:10:39 PM

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Nabila Khellaf, Mohammed Bouhelassa, André Zoulalian. Surfactant Recovery by Foam Fractionation using the Gas-Liquid Contactor, Emulsion Venturi. Separation Science and Technology, Taylor & Francis, 2014, 49 (2), pp.311-316. ⟨10.1080/01496395.2013.814147⟩. ⟨hal-01597790⟩

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