Estimation of current bypass in a bipolar electrode stack from current-potential curves

Comninellis, Ch.; Plattner, E.; Bolomey, P. H.

doi:10.1007/bf01024577

Cited by 28 publications

(11 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Validation with experimental results from Comninellis et al 46 .-Finally, the model proposed in this paper was validated with experimental results from Comninellis et al 46 Figure 1 of Ref. 46 for more details). The electrodes were separated from each other by insulating spacers at a fixed distance of 0.0033 m (h).…”

Section: Resultsmentioning

confidence: 53%

Compact and General Strategy for Solving Current and Potential Distribution in Electrochemical Cells Composed of Massive Monopolar and Bipolar Electrodes

Colli

Girault

2017

J. Electrochem. Soc.

View full text Add to dashboard Cite

A compact, fast and general algorithm based on Dirichlet boundary conditions for the potential field is derived to enable the calculation of local current distribution, shunt currents and the local potential distribution on massive electrodes in electrochemical cells of any type of geometry in three dimensions, composed of bipolar electrodes at an unknown floating potential and/or terminal monopolar electrodes. The algorithm allows performing the calculation of current-potential distributions and bypass currents for a fixed cell potential (potentiostatic) or a fixed cell current (galvanostatic) enforced to the cell. The proposed approach can be extended to take into account concentration variations of one or several species inside the cell or electrical conductivity variations due to the presence of separators or liquid-gas-solid phases. In order to validate the algorithm, a detailed comparison, between the suggested strategy with experimental results is made in the case of secondary current distribution for i) a segmented one bipolar electrode ii) a cell stack composed of 14 bipolar electrodes in the industrial process of alkaline water electrolysis. The proposed tool can help designers to develop more efficient electrochemical reactors by comparing results using different electrode materials, electrolytes and cell designs. . This paper is part of the JES Focus Issue on Mathematical Modeling of Electrochemical Systems at Multiple Scales in Honor of John Newman. ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 128.179.165.12 Downloaded on 2017-07-18 to IP E3466 Journal of The Electrochemical Society, 164 (11) E3465-E3472 (2017) ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 128.179.165.12 Downloaded on 2017-07-18 to IP ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 128.179.165.12 Downloaded on 2017-07-18 to IP ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 128.179.165.12 Downloaded on 2017-07-18 to IP

show abstract

Section: Resultsmentioning

confidence: 53%

Compact and General Strategy for Solving Current and Potential Distribution in Electrochemical Cells Composed of Massive Monopolar and Bipolar Electrodes

Colli

Girault

2017

J. Electrochem. Soc.

View full text Add to dashboard Cite

show abstract

“…Other detailed models can be found in the work of White et al [333], Rangarajan et al [334] and, more recently, by Henquín et al [335] The scheme by Yang et al was specifically developed for batteries [336]. Dimensionless group treatments for the scale-up of shunt currents can also be found [337], along with a simple method to estimate the shunt currents from current potential curves [338]. Shunt current models have been used to optimize modules of VRFBs, e.g.…”

Section: Management Of Shunt Currentsmentioning

confidence: 99%

Engineering aspects of the design, construction and performance of modular redox flow batteries for energy storage

Arenas

León

Walsh

2017

Journal of Energy Storage

253

162

View full text Add to dashboard Cite

Despite many studies and several extensive reviews of redox flow batteries (RFBs) over the last three decades, information on engineering aspects is scarce, which hinders progress with scale-up and implementation of this energy storage technology. This review summarises cell design requirements then critically considers design, construction and cell features together with their benefits and problems, leading to good practice through improved cell performance, knowledge and experience. Techniques for the characterisation of the reaction environment are illustrated by measurements of mass transport to (and from) electrode surfaces as a function of flow conditions, as well as pressure drop and electrolyte flow dispersion. The effect of design features on performance is illustrated by the effect of process conditions on the components of cell potential. Adequate attention to engineering aspects is seen to be critical to the effective performance of RFBs, particularly during scale-up and long-term operation. Techniques for the characterisation of reaction environment are summarised and a list of essential design and construction factors is provided. Finally, critical areas needing research and development are highlighted.

show abstract

“…In recent years there has been increasing interest in the use of electrochemical methods for the treatment of wastewaters (Comninellis et al, 1991;Comninellis, 1992;Comninellis, 1994;Comninellis et al, 1995). The organic and toxic pollutants present in treated wastewaters such as dyes and phenols are usually destroyed by a direct anodic process or by an indirect anodic oxidation via the production of oxidants such as hydroxyl radicals, ozone etc.…”

Section: Introductionmentioning

confidence: 99%

“…The organic and toxic pollutants present in treated wastewaters such as dyes and phenols are usually destroyed by a direct anodic process or by an indirect anodic oxidation via the production of oxidants such as hydroxyl radicals, ozone etc. Electrochemical methods have been successfully applied in the purification of several industrial wastewaters (Sharifian et al, 1985;Kusakabe et al, 1986;Comninellis et al, 1991;Lin et al, 1994) as well as landfill leachate (Chang et al, 1995), domestic sewage (Delia Monica et al, 1980; and tannery wastes (Szpyrkowicz et al, 1995;Naumczyk et al, 1996;.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical oxidation of a textile dye and finishing wastewater using a Pt/Ti electrode

Vlyssides

Israilides

1998

Journal of Environmental Science and Health, Part A

View full text Add to dashboard Cite

Textile Dye and Finishing Wastewater (TDFW) from a reactive cellulosic azo dyeing and finishing process was treated by an electrochemical oxidation method using Ti/Pt as anode and Stainless Steel 304 as cathode. The strong oxidizing potential of the chemicals produced when the wastewater was passed through the electrolytic cell resulted in the oxidation of organic pollutants to carbon dioxide and water. Batch, laboratory-scale and pilot-plant experiments were run and the results are reported in relation to residence time and initial addition of HC1 and NaCl in raw wastewater. Addition of higher initial amounts of NaCl and HC1 resulted in an improved color and chemical chemical oxygen demand (COD) 847 848 VLYSSIDES AND ISRAILIDES removal. The COD was removed by 92% when electrolysis was carried out for 40 minutes at 0.89 A/em 2 in presence of 2 ml 36% HCl and 1% NaCl. Furthermore, explain in ADMI color units were reduced by 94%, biological oxygen demand (BOD5) was reduced by 92.2%, and total Kjeldahl nitrogen was reduced by 100%. At the same time the efficiency of the electrode was about 80 g h -1 A -1 sq.m -1 . and the mean energy consumption was 44 kwh per kg of COD. These results indicate that this electrolytic method could be used for effective TDFW oxidation.

show abstract

Estimation of current bypass in a bipolar electrode stack from current-potential curves

Cited by 28 publications

References 3 publications

Compact and General Strategy for Solving Current and Potential Distribution in Electrochemical Cells Composed of Massive Monopolar and Bipolar Electrodes

Compact and General Strategy for Solving Current and Potential Distribution in Electrochemical Cells Composed of Massive Monopolar and Bipolar Electrodes

Engineering aspects of the design, construction and performance of modular redox flow batteries for energy storage

Electrochemical oxidation of a textile dye and finishing wastewater using a Pt/Ti electrode

Contact Info

Product

Resources

About