Kinetic pathways of iron electrode transformations in Galvano-Fenton process: A mechanistic investigation of in-situ catalyst formation and regeneration - Université Claude Bernard Lyon 1 Accéder directement au contenu
Article Dans Une Revue Journal of the Taiwan Institute of Chemical Engineers Année : 2020

Kinetic pathways of iron electrode transformations in Galvano-Fenton process: A mechanistic investigation of in-situ catalyst formation and regeneration

Résumé

The present paper constitutes a conjugate numerical and experimental study of a novel process patented as Galvano-Fenton, based on the association of galvanic corrosion and Fenton reaction. The study investigates the pathways of the in-situ formation and regeneration of iron species involved in electrochemical and chemical mechanisms of the Galvano-Fenton process, with the objective of understanding the kinetics mechanism and identifying the predominant reaction paths. The kinetics of Fe(III) was assessed experimentally using Fricke dosimetry, while the chemical schema evolving in the electrolyte was examined using numerical modeling, and assuming four incremental mechanistic scenarios. The mechanistic scenario accounting for sulfate ions reactivity and iron complex formation showed the highest correlation with experimental results i.e. 93.5%. It demonstrated that the +3 oxidation state iron represents 85% of iron forms, mainly as FeOH2+ complex, but also proved that predominant regeneration pathways of Fe2 + are radical, activated by HO2• and O2•−.
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Dates et versions

hal-03327547 , version 1 (27-08-2021)

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Intissar Gasmi, Kaouther Kerboua, Naoufel Haddour, Oualid Hamdaoui, Abdulaziz Alghyamah, et al.. Kinetic pathways of iron electrode transformations in Galvano-Fenton process: A mechanistic investigation of in-situ catalyst formation and regeneration. Journal of the Taiwan Institute of Chemical Engineers, 2020, 116, pp.81-91. ⟨10.1016/j.jtice.2020.10.026⟩. ⟨hal-03327547⟩
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