Publicado

2014-09-01

Effect of an electrolyte flow on electrochemical hydrogen permeation

Efecto de un flujo de electrolito en la permeación electroquímica de hidrógeno

DOI:

https://doi.org/10.15446/dyna.v81n187.40960

Palabras clave:

Electrochemical hydrogen permeation, pure iron (en)
ermeación electroquímica de hidrógeno, hierro puro (es)

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Autores/as

  • Ana María Pérez-Ceballos Universidad de Antioquia
  • Jorge Andres Calderón-Gutierrez Universidad de Antioquia
  • Oscar Rosa-Mattos Universidad Federal de Rio de Janeiro
The influence of an electrolyte flux injection over the detection side on pure iron membranes on electrochemical hydrogen permeation test was studied. A modified Devanathan's cell was used in the experiments. This cell allows the injection of an electrolyte flux over the hydrogen exit side during the permeation tests. In the hydrogen generation compartment a NaOH 0.1M + 2mgL-1 As2O3 solution was used applying a constant current of 2.85 mA. The detection side was maintained under potentiostatic control at potential values in the passivity range for iron. The solution used in the exit compartment was a borate buffer (pH=8.4). It was not observed a significant variation of the permeation current when an electrolyte flow was injected on iron samples, however, a slightly raise both of the steady state of permeation current density and the calculated permeation parameters was observed in the tests in which an electrolyte flux was applied.
Se ha estudiado el efecto de la aplicación de un flujo de electrolito sobre la superficie de detección de una membrana de hierro puro en ensayos de permeación electroquímica de hidrógeno. Para la realización de los ensayos se usó una celda del tipo Devanathan modificada, de tal manera que un flujo de electrolito fue inyectado directamente sobre la superficie de salida de hidrógeno. La generación de hidrógeno se realizó aplicando una corriente catódica de 2,85mA y se usó una solución de NaOH 0,1M + 2mgL-1 As2O3. La celda de detección fue mantenida bajo control potenciostático y se usó una solución buffer de borato de sodio (pH=8,4). No se observó una variación significativa de la corriente de permeación en los ensayos realizados aplicando flujo de electrolito.

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Cómo citar

[1]
A. M. Pérez-Ceballos, J. A. Calderón-Gutierrez, y O. Rosa-Mattos, «Efecto de un flujo de electrolito en la permeación electroquímica de hidrógeno», DYNA, vol. 81, n.º 187, pp. 152–157, sep. 2014, doi: 10.15446/dyna.v81n187.40960.

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