The application of flow dispersion models to the FM01-lC laboratory filter-press reactor


Trinidad, P., Ponce de León, C.A. and Walsh, F.C. (2006) The application of flow dispersion models to the FM01-lC laboratory filter-press reactor. Electrochimica Acta, 52, (2), 604-613. (doi:10.1016/j.electacta.2006.05.040).

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Description/Abstract

The flow distribution in the rectangular channel of a laboratory filter-press electrochemical reactor was evaluated using three flow models namely (a) axial dispersion, (b) sum of two phases and (c) fast and stagnant zones. In the case of the axial dispersion model, several methods have been used to calculate the Peclet number,; the moment method, the non-linear least squares and the Laplace transform technique. Several boundary conditions, involving different physical and experimental assumptions of the flow were used to solve the partial differential equation that describes the flow behaviour. A total of nine expressions to examine flow dispersion has been used. The comparison of experimental and predicted response signals was made by evaluating the root mean squared error. A data fit in real time has been found to be a better choice as solutions based on the evaluation of moments are prone to error due the overweight of the signal at long times. Data fitting in the Laplace plane is very accurate but it does not guarantee a good fit in real time. Models based on the sum of a fast and a slow or stagnant phase resulted in solutions having very low values of the extension of the slow and stagnant phases, the assumption of a single phase with some degree of dispersion was considered more appropriate.

Item Type: Article
ISSNs: 0013-4686 (print)
Related URLs:
Keywords: axial dispersion, channel flow, electrochemical reactor, filter-press cell, flow dispersion models, parallel plate geometry, sum of two phases, turbulence
Subjects: T Technology > TP Chemical technology
Q Science > QD Chemistry
Divisions: University Structure - Pre August 2011 > School of Engineering Sciences
University Structure - Pre August 2011 > School of Engineering Sciences > Engineering Materials & Surface Engineering
ePrint ID: 39317
Date Deposited: 27 Jun 2006
Last Modified: 27 Mar 2014 18:24
URI: http://eprints.soton.ac.uk/id/eprint/39317

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