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The characterisation of bipolar thin film electrolysers

The characterisation of bipolar thin film electrolysers
The characterisation of bipolar thin film electrolysers

The object of this study was the investigation of the performance of a bipolar trickle reactor . A number of electrochemical diagnostic methods have been used and an electrochemical tracer technique developed. Voltage and current distributions within the bipolar trickle reactor as well as the voltage distribution along a bipolar electrode were measured. The theoretical formulation has been extended to incorporate a fast reversible. reaction in the presence of diffusion polarisation. This provides a method for determining the film thickness and diffusion limiting current. The electrochemical tracer technique was employed in determining the hydrodynamic characteristics and the reaction rate constants for the reactor as a whole. Theoretical descriptions of modified flow models have been derived with an ensuing discussion of their validity. Experimental data have been fitted to the theoretical expressions in the time and Laplace domains. A model with both fast and slow-moving phases gives excellent agreement with experimental curves, although a simple dispersion model is seen to be a reasonable approximation. The difference in effect between the boundary conditions used was small. Hydrodynamic parameters and the reaction rate constant for copper deposition as functions of both the film Reynolds number and the dimensions of the bipolar trickle reactor used have been provided.

University of Southampton
Ibrisagić, Zinaida
Ibrisagić, Zinaida

Ibrisagić, Zinaida (1977) The characterisation of bipolar thin film electrolysers. University of Southampton, Doctoral Thesis.

Record type: Thesis (Doctoral)

Abstract

The object of this study was the investigation of the performance of a bipolar trickle reactor . A number of electrochemical diagnostic methods have been used and an electrochemical tracer technique developed. Voltage and current distributions within the bipolar trickle reactor as well as the voltage distribution along a bipolar electrode were measured. The theoretical formulation has been extended to incorporate a fast reversible. reaction in the presence of diffusion polarisation. This provides a method for determining the film thickness and diffusion limiting current. The electrochemical tracer technique was employed in determining the hydrodynamic characteristics and the reaction rate constants for the reactor as a whole. Theoretical descriptions of modified flow models have been derived with an ensuing discussion of their validity. Experimental data have been fitted to the theoretical expressions in the time and Laplace domains. A model with both fast and slow-moving phases gives excellent agreement with experimental curves, although a simple dispersion model is seen to be a reasonable approximation. The difference in effect between the boundary conditions used was small. Hydrodynamic parameters and the reaction rate constant for copper deposition as functions of both the film Reynolds number and the dimensions of the bipolar trickle reactor used have been provided.

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Published date: 1977

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Local EPrints ID: 462676
URI: http://eprints.soton.ac.uk/id/eprint/462676
PURE UUID: 1f950f1f-2311-4c66-94ff-5acf2b83b251

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Date deposited: 04 Jul 2022 19:40
Last modified: 04 Jul 2022 19:40

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Contributors

Author: Zinaida Ibrisagić

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