Comparison between primary and secondary current distributions in bipolar electrochemical reactors

Henquín, E. R.; Bisang, Jose Maria

doi:10.1007/s10800-009-9874-6

Cited by 7 publications

(6 citation statements)

References 8 publications

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“…Parametric analysis and theoretical predictions.-The mathematical model presented in this paper has been numerically solved using equations, 14,19,23 and. 24 Equation 11 was used to calculate the cell voltage, as described in the previous section.…”

Section: Tafel Kineticsmentioning

confidence: 99%

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General Simplified Model to Calculate Current Distribution in Electrochemical Reactors with N Bipolar Electrodes

Rodríguez

Henquín

2019

J. Electrochem. Soc.

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A new mathematical model to calculate current density distributions and leakage current in electrochemical reactors with N bipolar electrodes, which are closer to those found in the industrial field, is developed. Several electrochemical kinetics are considered with the aim of making the model as diverse and robust as possible. Parametric analyses are carried out. The number of bipolar electrodes being used affects current density distributions, reaching a limit if N > 10. The models are validated with experimental points considering primary and secondary current density distribution, and these results are compared with those obtained from previous models.

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Section: Tafel Kineticsmentioning

confidence: 99%

“…Frequently, the system to be solved is represented by means of a series-parallel electrical circuit. 16,17 The use of some commercial software 18 and / or the use of numerical discretization techniques, for example finite difference, 19 is commonly found in the literature.…”

mentioning

confidence: 99%

General Simplified Model to Calculate Current Distribution in Electrochemical Reactors with N Bipolar Electrodes

Rodríguez

Henquín

2019

J. Electrochem. Soc.

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“…Following a similar approach, Henquín and Bisang (Henquín and Bisang, 2009) studied current distribution in bipolar electrochemical reactors. Modelling the primary and secondary current distributions, they established that the latter is critically determined by a current leakage and an open bipolar stack, where the electrolyte is not constrained between the electrodes.…”

Section: Introductionmentioning

confidence: 99%

Modelling the Scaling-Up of the Nickel Electroforming Process

Andreou

Roy

2022

Front. Chem. Eng.

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Electroforming is increasingly gaining recognition as a promising and sustainable additive manufacturing process of the “Industry 4.0” era. Numerous important laboratory-scale studies try to shed light onto the pressing question as to which are the best industry approaches to be followed towards the process’s optimisation. One of the most common laboratory-scale apparatus to gather electrochemical data is the rotating disk electrode (RDE). However, for electroforming to be successfully optimised and efficiently applied in industry, systematic scale up studies need to be conducted. Nowadays, well-informed simulations can provide a much-desired insight into the novelties and limits of the process, and therefore, scaling up modelling studies are of essence. Targeted investigations on how the size and geometry of an electroforming reactor can affect the final product could lead to process optimisation through simple modifications of the setup itself, allowing immediate time- and cost-effective adjustments within existing production lines. This means that the accuracy of results that any scaled up model provides, if compared to a successful, smaller scale version of itself, needs to be investigated. In this work a 3-D electrodeposition model of an RDE was used to conduct geometry and model sensitivity studies using a commercial software as is often done in industry. As a next step, a 3-D model of an industrial-scale electroforming reactor, which was 90 times larger in electrolyte volume compared to the RDE, was developed to compare, and identify the key model parameters during scale up. The model results were validated against experimental data collected in the laboratory for both cases to assess model validity.

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“…The findings of this thesis were published in a timely and sequential manner. [13][14][15][16] Up until that point, there was a lack of simplified mathematical models that study the relationship between parasitic currents and CDD on the electrodes in electrochemical reactors with more than 1 bipolar electrode, while considering one electrochemical kinetics. Thus, in Ref.…”

mentioning

confidence: 99%

Generalized Algebraic Phenomenological Model for Parallel-Plate Bipolar Electrochemical Reactors

Henquín

2023

J. Electrochem. Soc.

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Electrochemical reactors with bipolar electrodes are widely used in industry and laboratories due to their ease of assembly and electrical connection. Understanding the impact of leakage currents on reactor performance is crucial for design improvement. Previous studies have analyzed these devices using the Laplace equation and Tafel kinetics for a single bipolar electrode. A simplified analysis of a reactor with multiple bipolar electrodes was also conducted, neglecting the contribution of intermediate electrodes to the leakage current. Here, a simplified model to analyse the influence of leakage current on electrode current distribution in a reactor with n bipolar electrodes is developed. Multiple models to study current that flows perpendicular to the electrodes, finally becoming parasitic current, are proposed. Also, two reaction kinetics, Tafel and Butler-Volmer, are taken into account. Experimental data from reactors with one bipolar electrode considering Tafel-type kinetics, and with one and two bipolar electrodes considering primary current distribution, are compared with predictions obtained through the Laplace equation, and the models of this paper. Given the current importance of green hydrogen, this work sheds light on the implications of the study and design of electrochemical reactors used in its production.

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Comparison between primary and secondary current distributions in bipolar electrochemical reactors

Cited by 7 publications

References 8 publications

General Simplified Model to Calculate Current Distribution in Electrochemical Reactors with N Bipolar Electrodes

General Simplified Model to Calculate Current Distribution in Electrochemical Reactors with N Bipolar Electrodes

Modelling the Scaling-Up of the Nickel Electroforming Process

Generalized Algebraic Phenomenological Model for Parallel-Plate Bipolar Electrochemical Reactors

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