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Oxygen mass transfer correlations for pure and salt water in a well-mixed vessel / Gordon A. Hill in Industrial & engineering chemistry research, Vol. 48 N° 7 (Avril 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 7 (Avril 2009) . - pp. 3696–3699 Titre : Oxygen mass transfer correlations for pure and salt water in a well-mixed vessel Type de document : texte imprimé Auteurs : Gordon A. Hill, Auteur Année de publication : 2009 Article en page(s) : pp. 3696–3699 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Oxygen  mass  transfer  Reverse  osmosis  Salt  water  Well-mixed  vessel Résumé : The mass transfer rates of oxygen from air bubbles into both reverse osmosis (RO) and salt water (2.85% NaCl by mass) inside a baffled, well-mixed vessel have been investigated. Low aeration rates and impeller speeds were selected according to the Central Composite Rotatable Design (CCRD) experimental design approach. Empirical correlations with less than ±3% average prediction errors have been developed. Using identical operating conditions, the rate of oxygen transfer into pure RO water was significantly faster than that into salt water, with mass transfer coefficients ranging between 5.6 and 16.3 1/h for RO water and 4.4 and 14.7 1/h for salt water. The lower rates of oxygen transfer for salt water are hypothesized to be due to increased viscosity and correspondingly reduced diffusion in the boundary layer. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie8019906 [article] Oxygen mass transfer correlations for pure and salt water in a well-mixed vessel [texte imprimé] / Gordon A. Hill, Auteur . - 2009 . - pp. 3696–3699. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 7 (Avril 2009) . - pp. 3696–3699 Mots-clés : Oxygen  mass  transfer  Reverse  osmosis  Salt  water  Well-mixed  vessel Résumé : The mass transfer rates of oxygen from air bubbles into both reverse osmosis (RO) and salt water (2.85% NaCl by mass) inside a baffled, well-mixed vessel have been investigated. Low aeration rates and impeller speeds were selected according to the Central Composite Rotatable Design (CCRD) experimental design approach. Empirical correlations with less than ±3% average prediction errors have been developed. Using identical operating conditions, the rate of oxygen transfer into pure RO water was significantly faster than that into salt water, with mass transfer coefficients ranging between 5.6 and 16.3 1/h for RO water and 4.4 and 14.7 1/h for salt water. The lower rates of oxygen transfer for salt water are hypothesized to be due to increased viscosity and correspondingly reduced diffusion in the boundary layer. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie8019906