Identification and control of electrochemical reactors
Identification and control of electrochemical reactors
Techniques to improve the quality of data characterising the performance of electrochemical reactors obtainable from the measurement of mass transfer limited current as an analogue of concentration have been developed. Consideration has been given to the nature and geometry of the electrodes and to the electrical interactions between pairs of electrodes immersed in a common electrolyte. The use of continuous perturbation and correlation analysis to obtain concentration impulse response data has been demonstrated and has been shown to be possible only by using the electrical isolation techniques developed here. Measurements of cyclic voltanmetric data using very small silver electrodes have been developed for the on-line monitoring of silver ion concentration in the range 30 - 200 ppm. A general purpose data logging and control system based on a microprocessor has been developed and has been used to investigate the deposition of silver in a laboratory-scale trickle tower reactor. The automatic collection of steady-state operating data using microelectrodes is described. Mathematical models have been developed to describe the behaviour of the reactor and these have been used to implement feed forward control of the flowrate in order to maintain constant outlet concentration when the reactor was subjected to load (inlet concentration)changes. Data are presented which show that, with empirical tuning, this controller in conjunction with feedback action on the cell voltage can effect good set-point regulation of the reactor.
University of Southampton
1980
Overstall, John
(1980)
Identification and control of electrochemical reactors.
University of Southampton, Doctoral Thesis.
Record type:
Thesis
(Doctoral)
Abstract
Techniques to improve the quality of data characterising the performance of electrochemical reactors obtainable from the measurement of mass transfer limited current as an analogue of concentration have been developed. Consideration has been given to the nature and geometry of the electrodes and to the electrical interactions between pairs of electrodes immersed in a common electrolyte. The use of continuous perturbation and correlation analysis to obtain concentration impulse response data has been demonstrated and has been shown to be possible only by using the electrical isolation techniques developed here. Measurements of cyclic voltanmetric data using very small silver electrodes have been developed for the on-line monitoring of silver ion concentration in the range 30 - 200 ppm. A general purpose data logging and control system based on a microprocessor has been developed and has been used to investigate the deposition of silver in a laboratory-scale trickle tower reactor. The automatic collection of steady-state operating data using microelectrodes is described. Mathematical models have been developed to describe the behaviour of the reactor and these have been used to implement feed forward control of the flowrate in order to maintain constant outlet concentration when the reactor was subjected to load (inlet concentration)changes. Data are presented which show that, with empirical tuning, this controller in conjunction with feedback action on the cell voltage can effect good set-point regulation of the reactor.
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Published date: 1980
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Local EPrints ID: 462927
URI: http://eprints.soton.ac.uk/id/eprint/462927
PURE UUID: d96c49f4-1ac6-4087-a417-df605169dd29
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Date deposited: 04 Jul 2022 20:23
Last modified: 04 Jul 2022 20:23
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Author:
John Overstall
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