SciELO - Scientific Electronic Library Online

 
vol.36 número5Corrosion Inhibition of Zn in a 0.5 M HCl Solution by Ailanthus Altissima ExtractThymus Sahraouian Essential Oil as Corrosion Eco-friendly Inhibitor for Mild Steel in a Molar Hydrochloric Acid Solution índice de autoresíndice de materiabúsqueda de artículos
Home Pagelista alfabética de revistas  

Servicios Personalizados

Revista

Articulo

Indicadores

Links relacionados

  • No hay articulos similaresSimilares en SciELO

Compartir


Portugaliae Electrochimica Acta

versión impresa ISSN 0872-1904

Resumen

ABBAR, Ali H.  y  ABBAS, Ammar S.. A Kinetic Study of Oxalic Acid Electrochemical Oxidation on a Manganese Dioxide Rotating Cylinder Anode. Port. Electrochim. Acta [online]. 2018, vol.36, n.5, pp.325-337. ISSN 0872-1904.  https://doi.org/10.4152/pea.201805325.

This paper deals with the theory and kinetics of oxalic acid electrochemical oxidation, in an acidic solution containing sodium chloride, using a manganese dioxide rotating cylinder anode. Voltammetric and galvanostatic electrolysis techniques were used. The voltametric study shows a higher anodic wave corresponding to chlorine oxidation on the MnO2 electrode, prevailing oxalic acid indirect oxidation. Galvanostatic electrolysis studies confirmed that the rate constant is affected by chloride concentration, current density, agitation and temperature. Electrochemical oxidation rate was found to be a pseudo-first order kinetic process. A strongly linear relationship between the rate constant and chloride concentration was observed, while polynomial relations, with respect to current density and temperature, were found. The activation energy was found to be 14.541 kJ/mol, which suggests a diffusion control kinetic step in oxalic acid degradation. The findings of the present research validate that oxalic acid incineration can be successfully carried out on a MnO2 anode, in NaCl presence.

Palabras clave : electrochemical incineration; oxalic acid; manganese dioxide; sodium chloride; pseudo-kinetics; activation energy.

        · texto en Inglés     · Inglés ( pdf )

 

Creative Commons License Todo el contenido de esta revista, excepto dónde está identificado, está bajo una Licencia Creative Commons