The behaviour of bipolar packed-bed electrodes

Goodridge, F.; King, C. Judson; Wright, A.R.

doi:10.1016/0013-4686(77)85085-8

Cited by 42 publications

(23 citation statements)

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“…Packed-bed reactors can be designed in two configurations. The first is the bipolar type [5], in which only the top layer and bottom layer are connected to the current collector. The intermediate layers are separated by porous insulators and function as bipolar electrodes.…”

Section: Cn-mentioning

confidence: 99%

A comparative study of electrochemical reactor configurations for the decomposition of copper cyanide effuent

1992

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Section: Cn-mentioning

confidence: 99%

A comparative study of electrochemical reactor configurations for the decomposition of copper cyanide effuent

1992

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“…Goodridge et al [5,6] and Goodridge [7] studied the behaviour of conductive particles set in an electrical field. In [5], the particles are mechanically isolated between them, whereas in [6,7] the separation of the particles is achieved by fluidization.…”

Section: Introductionmentioning

confidence: 99%

“…In [5], the particles are mechanically isolated between them, whereas in [6,7] the separation of the particles is achieved by fluidization. These contributions give more attention to the specific energy consumption of the reactors and the theoretical values are compared with experimental ones obtained using the production of hypochlorite, hypobromite, epoxidation of styrene and synthesis of dimethyl sebacate as test reactions.…”

Section: Introductionmentioning

confidence: 99%

Theoretical and experimental study of electrochemical reactors with three-dimensional bipolar electrodes

Pérez

Bisang

2009

J Appl Electrochem

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A mathematical model to represent threedimensional bipolar electrodes is proposed taken into account the leakage current. The model is analytically solved when the electrochemical reaction has a masstransfer control at low overpotentials, which represents a limiting case of the general mathematical treatment. For this simplified situation, expressions are deduced to evaluate the current and potential distribution and to calculate the leakage current. The effect on the leakage current of kinetic, electrochemical and geometric variables, which are lumped into one dimensionless number, is discussed. The influence of the leakage current on the optimal bed depth under limiting current conditions is also analyzed. Likewise, experimental data, using the deposition-dissolution of copper as test reaction, are compared with the theoretical prediction of the general treatment achieving a good agreement between both. List of symbols VariablesA s Surface area per unit electrode volume (m -1 ) C Concentration (mol m -3 , mol dm -3 or ppm) d Wire diameter (m) D Diffusion coefficient (m 2 s -1 ) E 0 Reversible electrode potential (V) E 0 0 Reversible electrode potential under standard conditions (V) F Faraday constant (C mol -1 ) i Current density (A m -2 ) I Total current (A) I * Leakage current (A) j Reaction rate (A m -2 ) j d j-factor for mass transfer = k m /(u/e) Sc 2/3 j 0 Exchange current density (A m -2 ) j L Limiting current density (A m -2 ) k m Mass-transfer coefficient (m s -1 ) L Thickness of the bipolar electrode (m) L c Thickness of the cathodic part at the bipolar electrode (m) M Atomic weight (kg mol -1 ) RT/F Constant (0.0261 V at 30°C) (V) Re Reynolds number = ud/(em) R p Polarization resistance (X) R s Electrolyte resistance (X) S Membrane area (m 2 ) Sc Schmidt number = m/D t Time of the experiment (s or min) u Superficial electrolyte flow velocity (m s -1 ) Wa Wagner number x Axial coordinate (m) y Axial coordinate (m) z Axial coordinate (m) Greek characters b Charge-transfer coefficient c Activity coefficient d Density (kg m -3 ) Dr Change in the wire radius (m)

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“…1), which allows OM oxidation to commence on the GAC bipolar electrode [17][18][19]. Hence, the oxidation rate r in the BEs can be expressed as:…”

Section: Resultsmentioning

confidence: 99%

A novel cost-saving strategy for electrochemical oxidation of organic matters by multi-current controlled operation

Wang

Zhang

et al. 2013

Separation and Purification Technology

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The behaviour of bipolar packed-bed electrodes

Cited by 42 publications

References 1 publication

A comparative study of electrochemical reactor configurations for the decomposition of copper cyanide effuent

A comparative study of electrochemical reactor configurations for the decomposition of copper cyanide effuent

Theoretical and experimental study of electrochemical reactors with three-dimensional bipolar electrodes

A novel cost-saving strategy for electrochemical oxidation of organic matters by multi-current controlled operation

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