Bubble size distribution for a bubble column reactor undergoing forced oscillations / Y. G. Waghmare in Industrial & engineering chemistry research, Vol. 48 N°4 (Février 2009)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 48 N°4 (Février 2009) . - pp. 1786–1796 Titre : Bubble size distribution for a bubble column reactor undergoing forced oscillations Type de document : texte imprimé Auteurs : Y. G. Waghmare, Auteur ; C. A. Dorao, Auteur ; H. A. Jakobsen, Auteur Année de publication : 2009 Article en page(s) : pp. 1786–1796 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Oscillations Bubble size distribution Air-water system Breakage models Résumé : It has recently been shown that low amplitude (0.5−2.5 mm) oscillations at low frequencies (10−25 Hz) can be used to improve bubble column performance. Here, we report the study of bubble size distribution (BSD) in an oscillating bubble column for the air−water system. BSD was measured at different heights in the column, and the effects of various operating parameters such as frequency, amplitude, and gas flow rate were studied. Sauter mean diameter was calculated from BSD data, and it was correlated as a function of power input per unit mass using the Hinze formula. Population balance modeling simulations were performed. Two different breakage models (Martinez−Bazan and Luo−Svendsen) were considered which differ fundamentally in the constitution of the models and as a result predict opposite shapes of daughter size distribution curves. Simulation results were compared against experimental data, and both the models gave good comparisons with the measured Sauter mean bubble diameters. The predictions obtained from the simulation for BSD using the Martinez−Bazan model were in quantitative agreement with the experimental observations suggesting vibrations produce nearly equal size bubble breakage. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801375h [article] Bubble size distribution for a bubble column reactor undergoing forced oscillations [texte imprimé] / Y. G. Waghmare, Auteur ; C. A. Dorao, Auteur ; H. A. Jakobsen, Auteur . - 2009 . - pp. 1786–1796. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N°4 (Février 2009) . - pp. 1786–1796 Mots-clés : Oscillations Bubble size distribution Air-water system Breakage models Résumé : It has recently been shown that low amplitude (0.5−2.5 mm) oscillations at low frequencies (10−25 Hz) can be used to improve bubble column performance. Here, we report the study of bubble size distribution (BSD) in an oscillating bubble column for the air−water system. BSD was measured at different heights in the column, and the effects of various operating parameters such as frequency, amplitude, and gas flow rate were studied. Sauter mean diameter was calculated from BSD data, and it was correlated as a function of power input per unit mass using the Hinze formula. Population balance modeling simulations were performed. Two different breakage models (Martinez−Bazan and Luo−Svendsen) were considered which differ fundamentally in the constitution of the models and as a result predict opposite shapes of daughter size distribution curves. Simulation results were compared against experimental data, and both the models gave good comparisons with the measured Sauter mean bubble diameters. The predictions obtained from the simulation for BSD using the Martinez−Bazan model were in quantitative agreement with the experimental observations suggesting vibrations produce nearly equal size bubble breakage. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801375h

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