Application of population balance models to the study of nucleation and growth of bubbles produced at gas evolving electrodes

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dc.contributor.authorHofman, David Lester
dc.date.accessioned2015-08-06T08:32:34Z
dc.date.available2015-08-06T08:32:34Z
dc.date.issued2015-08-06
dc.descriptionA Dissertation Submitted to the Faculty of engineering University of the Witwatersrand, Johannesburg for the Degree of Master of Science in Engineering Johannesburg 1984en_ZA
dc.description.abstractThe rate of mass transfer at gas evolving electrodes has been shown to be a strong function of the so-called bubble break off diameter of the gas bubbles leaving the electrode surface. This dissertation shows how the population balance can be applied to the formation of gas bubbles at gas evolving electrodes. This analysis provides a means of predicting the bubble break off aiameter. Experiments were also performed to measure the bubble break off diameter as well as other parameters, such as the rate of bubble growth, used in the population balance moce-i>. The effect of viscosity, electrolyte flowrate and current on the bubble break off diameter is also investigated. The flowrate and current have little effect on the bubble bi ak off diameters, whi.e the break - - - diameters show a decrease in size with increasing viscosity. The bubble break off diameters predicted by the population balance mode, and those measured were significantly larger than those reported in the literatureen_ZA
dc.identifier.urihttp://hdl.handle.net/10539/18189
dc.language.isoenen_ZA
dc.subject.lcshGas dynamics
dc.titleApplication of population balance models to the study of nucleation and growth of bubbles produced at gas evolving electrodesen_ZA
dc.typeThesisen_ZA
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