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Measurement and analysis of gas bubble evolution from an anode in electrolytic cells / Supathorn Phongikaroon in Industrial & engineering chemistry research, Vol. 49 N° 6 (Mars 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 6 (Mars 2010) . - pp. 2926–2931 Titre : Measurement and analysis of gas bubble evolution from an anode in electrolytic cells Type de document : texte imprimé Auteurs : Supathorn Phongikaroon, Auteur ; Robert O. Hoover, Auteur ; Emily C. Barker, Auteur Année de publication : 2010 Article en page(s) : pp. 2926–2931 Note générale : Industriel Chemistry Langues : Anglais (eng) Mots-clés : Measurement--Analysis--Gas--Bubble--Evolution--Anode--Electrolytic--Cells Résumé : Measurement and analysis of oxygen gas bubbles generated from an anode in different aqueous electrolytic solutions have been studied at different applied currents (I). Bubble size distribution (BSD) was measured by using a high-speed digital camera, while corresponding voltage and current were recorded by an electrophoresis power supply. At low aqueous kinematic viscosity (νc < 0.017 cm2/s), the analyzed bubble size (b) is a strong function of νc; here, the slope (Δb/Δνc) below 0.017 cm2/s is an order of magnitude larger than that above it. In addition, at the higher νc, b is dictated predominantly by I. BSD can be described by the log-normal form of the continuous number frequency distribution. Here, the dimensionless median diameter for the distribution (β̅) and the variance (σ0) of the normalized log-normal distribution are 0.98 ± 0.029 and 0.27 ± 0.073, respectively. Further analysis indicates that ohmic resistance decreases as b increases because of the reduction in void fraction in solution. The resistivity of the solution can be described using the creeping-flow equation of motion showing that viscosity dictates the initial solution resistance. Note de contenu : Bibiogr. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900908c [article] Measurement and analysis of gas bubble evolution from an anode in electrolytic cells [texte imprimé] / Supathorn Phongikaroon, Auteur ; Robert O. Hoover, Auteur ; Emily C. Barker, Auteur . - 2010 . - pp. 2926–2931. Industriel Chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 6 (Mars 2010) . - pp. 2926–2931 Mots-clés : Measurement--Analysis--Gas--Bubble--Evolution--Anode--Electrolytic--Cells Résumé : Measurement and analysis of oxygen gas bubbles generated from an anode in different aqueous electrolytic solutions have been studied at different applied currents (I). Bubble size distribution (BSD) was measured by using a high-speed digital camera, while corresponding voltage and current were recorded by an electrophoresis power supply. At low aqueous kinematic viscosity (νc < 0.017 cm2/s), the analyzed bubble size (b) is a strong function of νc; here, the slope (Δb/Δνc) below 0.017 cm2/s is an order of magnitude larger than that above it. In addition, at the higher νc, b is dictated predominantly by I. BSD can be described by the log-normal form of the continuous number frequency distribution. Here, the dimensionless median diameter for the distribution (β̅) and the variance (σ0) of the normalized log-normal distribution are 0.98 ± 0.029 and 0.27 ± 0.073, respectively. Further analysis indicates that ohmic resistance decreases as b increases because of the reduction in void fraction in solution. The resistivity of the solution can be described using the creeping-flow equation of motion showing that viscosity dictates the initial solution resistance. Note de contenu : Bibiogr. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900908c