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Effect of molar ratio of counter-ions to cationic surfactants on drag reduction characteristics of trimethylolethane hydrate slurries / Hiroshi Suzuki in International journal of refrigeration, Vol. 33 N° 8 (Décembre 2010) 

Public ISBD [article]  in International journal of refrigeration > Vol. 33 N° 8 (Décembre 2010) . - pp. 1632-1638 Titre : Effect of molar ratio of counter-ions to cationic surfactants on drag reduction characteristics of trimethylolethane hydrate slurries : Effet du taux molaire des ions opposés par rapport aux agents tensio-actifs cationiques sur les caractéristiques de réduction des traînées de coulis d'hydrates de triméthyloléthane traités par des agents tensio-actifs Type de document : texte imprimé Auteurs : Hiroshi Suzuki, Auteur ; Shingo Tateishi, Auteur ; Yoshiyuki Komoda, Auteur Année de publication : 2011 Article en page(s) : pp. 1632-1638 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Hydrate  Friction  Non-Newtonian  fluid  Two-phase  heat  carrier  Additive Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : An experimental study on flow characteristics of trimethylolethane (TME) hydrate slurries treated with drag-reducing surfactants has been performed in order to investigate the effect of molar ratio of counter-ions to surfactants. As drag-reducing surfactants, oleylbishydroxyethylmethylammonium chloride was used. The molar ratio of counter-ions of sodium salicylate to surfactants ranged from 0 to 100 and surfactant concentration was changed in two steps; 1000 ppm and 2.000 ppm while the concentration of TME in water was set constant at 25 wt%. From the results, it was found that the drag reduction limitation becomes larger when the molar ratio of the counter-ions to surfactants is set around 20 for each surfactant concentration. From the detailed discussions, the drag reduction characteristics in a higher range of the molar ratio of counter-ions to surfactants were found to relate to the molar ratio of counter-ions to TME more significantly. Under the present conditions, it was concluded that 0.05 of the molar ratio of counter-ions to TME shows the most effective drag reduction. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700710002124 [article] Effect of molar ratio of counter-ions to cationic surfactants on drag reduction characteristics of trimethylolethane hydrate slurries : Effet du taux molaire des ions opposés par rapport aux agents tensio-actifs cationiques sur les caractéristiques de réduction des traînées de coulis d'hydrates de triméthyloléthane traités par des agents tensio-actifs [texte imprimé] / Hiroshi Suzuki, Auteur ; Shingo Tateishi, Auteur ; Yoshiyuki Komoda, Auteur . - 2011 . - pp. 1632-1638. Génie Mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 33 N° 8 (Décembre 2010) . - pp. 1632-1638 Mots-clés : Hydrate  Friction  Non-Newtonian  fluid  Two-phase  heat  carrier  Additive Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : An experimental study on flow characteristics of trimethylolethane (TME) hydrate slurries treated with drag-reducing surfactants has been performed in order to investigate the effect of molar ratio of counter-ions to surfactants. As drag-reducing surfactants, oleylbishydroxyethylmethylammonium chloride was used. The molar ratio of counter-ions of sodium salicylate to surfactants ranged from 0 to 100 and surfactant concentration was changed in two steps; 1000 ppm and 2.000 ppm while the concentration of TME in water was set constant at 25 wt%. From the results, it was found that the drag reduction limitation becomes larger when the molar ratio of the counter-ions to surfactants is set around 20 for each surfactant concentration. From the detailed discussions, the drag reduction characteristics in a higher range of the molar ratio of counter-ions to surfactants were found to relate to the molar ratio of counter-ions to TME more significantly. Under the present conditions, it was concluded that 0.05 of the molar ratio of counter-ions to TME shows the most effective drag reduction. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700710002124