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De - emulsification of kerosene / water emulsions with plate - type microchannels / Xiao Chen in Industrial & engineering chemistry research, Vol. 49 N° 19 (Octobre 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 19 (Octobre 2010) . - pp. 9279–9288 Titre : De - emulsification of kerosene / water emulsions with plate - type microchannels Type de document : texte imprimé Auteurs : Xiao Chen, Auteur ; Houfang Lu, Auteur ; Wei Jiang, Auteur Année de publication : 2010 Article en page(s) : pp. 9279–9288 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Microchannels  Emulsions Résumé : Kerosene-in-water emulsions were de-emulsified by narrow plate-type microchannels. The emulsions with different Sauter diameters of 5 or 10 μm were formed by high-shear homogenization method and passed through microchannels with clearances of 100 to 200 μm. The de-emulsification efficiency was from 10% to 30% in a single pass through the channel. By repeatedly passing through the microchannels, up to 90% de-emulsification efficiency can be achieved. The results showed that the de-emulsification efficiency was influenced by the flow rate, Sauter diameter, microchannel size, and wall materials. Hydrophobic surface of the microchannel improved the de-emulsification efficiency. A coupled two-step mechanism was proposed to illustrate the de-emulsification process. Specially, polytetrafluoroethylene−stainless steel (PTFE-SS) plate combination of the microchannel induced different velocities of the continuous phase close to the wall surface and helped the droplets of the emulsion move toward the PTFE wall and be captured. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie1005228 [article] De - emulsification of kerosene / water emulsions with plate - type microchannels [texte imprimé] / Xiao Chen, Auteur ; Houfang Lu, Auteur ; Wei Jiang, Auteur . - 2010 . - pp. 9279–9288. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 19 (Octobre 2010) . - pp. 9279–9288 Mots-clés : Microchannels  Emulsions Résumé : Kerosene-in-water emulsions were de-emulsified by narrow plate-type microchannels. The emulsions with different Sauter diameters of 5 or 10 μm were formed by high-shear homogenization method and passed through microchannels with clearances of 100 to 200 μm. The de-emulsification efficiency was from 10% to 30% in a single pass through the channel. By repeatedly passing through the microchannels, up to 90% de-emulsification efficiency can be achieved. The results showed that the de-emulsification efficiency was influenced by the flow rate, Sauter diameter, microchannel size, and wall materials. Hydrophobic surface of the microchannel improved the de-emulsification efficiency. A coupled two-step mechanism was proposed to illustrate the de-emulsification process. Specially, polytetrafluoroethylene−stainless steel (PTFE-SS) plate combination of the microchannel induced different velocities of the continuous phase close to the wall surface and helped the droplets of the emulsion move toward the PTFE wall and be captured. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie1005228