Статья
2019

Analysis of Potential Distribution at the Boundary with the Membrane inside a Flow-by Porous Electrode at Various Currents. Part I. Modeling


A. Zh. Medvedev A. Zh. Medvedev , A. I. Maslii A. I. Maslii , V. O. Luk’yanov V. O. Luk’yanov
Российский электрохимический журнал
https://doi.org/10.1134/S1023193519120115
Abstract / Full Text

The potential profiles at the boundary with the ion-exchange membrane and near the current feeder and the current and concentration profiles of the target electroactive component along the solution flow in the galvanostatic mode are calculated at various current loads using a simplified model of porous electrode. From the analysis of the calculated results, it follows that the potential profiles vary significantly depending on the current and the presence or absence of a side reaction. The results can be used for preliminary estimation of electrolysis mode, which provides the highest efficiency of porous electrode operation.

Author information
  • Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch, Russian Academy of Sciences, 630128, Novosibirsk, Russia

    A. Zh. Medvedev, A. I. Maslii & V. O. Luk’yanov

References
  1. Olvera, O.G. and Lapidus, G.T., Theoretical analysis of a flow-by electrochemical reactor with porous cathode for the simultaneous removal of different metal ions, J. Chem. React. Eng., 2010, vol. 8, p. A114.
  2. Sun, J.P., Xu, W.L., and Scott, K., An efficient method for solving the model equations of two dimensional packed bed electrodes, J. Appl. Electrochem., 1995, vol. 25, no. 8, p. 755.
  3. Ravikumar, M.K., Suman, R., Nandini, J., Satish, P., and Ashok, S., The renaissance in redox flow batteries, J. Solid State Electrochem., 2017, vol. 21, p. 2467.
  4. Tentorio, A. and Casolo-Gineli, U., Characterisation of reticulate, three-dimensional electrodes, J. Appl. Electrochem., 1978, vol. 8, no. 3, p. 195.
  5. Kreysa, G., Kinetic behaviour of packed and fluidised bed electrodes, Electrochim. Acta, 1978, vol. 23, no. 12, p. 1351.
  6. Masliy, A.I., Poddubny, N.P., Medvedev, A.Zh., and Lukyanov, V.O., Analysis of the distribution of geometrical current density along the direction of solution flow inside flow-by porous electrodes, J. Electroanal. Chem., 2015, vol. 757, p. 128.
  7. Maslii, A.I., Poddubnyi, N.P. and Medvedev, A.Zh., Distribution of geometrical current density inside a flow-by porous electrode: effect of electrode parameters and electrochemical reactions, Russian J. Electrochem., 2016, vol. 52, no. 6, p. 576.
  8. Vais, A.A., Beck, R.Yu, Maslii, A.I., Belobaba, A.G., Korolyuk, A.V., and Zakharova, N.M., Bulk-porous electrode material and flow-through electrode based on it, Russian Patent 2178017, 2002.
  9. Aleksandrova, T.P., Vais, A.A., Masliy, A.I., Burmistrov, V.A., Gusev, A.A., and Bagavieva, S.K., Synthetic fibers with silver-containing coatings and their antimicrobial properties, Mater. Manufactur. Proc., 2015, vol. 30, no. 6, p. 798.
  10. Maslii, A.I., Poddubnyi, N.P. and Medvedev, A.Zh., Checking of applicability of conditions for reaching the limiting-current mode to flow-by porous electrodes, Russ. J. Electrochem., 2017, vol. 53, no. 1, p. 110.
  11. Langlois, S. and Coeuret, F., Flow-through and flow-by porous electrodes of nickel foam. Part III: theoretical electrode potential distribution in the flow-by configuration, J. Appl. Electrochem., 1990, vol. 20, p. 740.