Simultaneous Galvanic Generation of Fe2+ Catalyst and Spontaneous Energy Release in the Galvano-Fenton Technique: A Numerical Investigation of Phenol’s Oxidation and Energy Production and Saving

Catalysts

Oualid Hamdaoui¹  Abdulaziz Alghyamah¹  Kaouther Kerboua²  Naoufel Haddour³ 

[1] Chemical Engineering Department, College of Engineering, King Saud University, P.O. Box 800, Riyadh 11421, Saudi Arabia;Higher School of Industrial Technologies, Department of Second Cycle, P.O. Box 218, Annaba 23000, Algeria;Laboratoire Ampère, École Centrale de Lyon, 36 Avenue Guy de Collongue, 69134 Écully, France;

关键词: Galvano-Fenton;    pre-immersion;    electro-Fenton;    hydroxyl radical;    energy;    degradation;   

DOI  :  10.3390/catal11080943

来源: DOAJ

【 摘 要 】

The present paper investigates the potential of the Galvano-Fenton process as an advanced technique in terms of the simultaneous oxidation of a model pollutant, phenol, and the energy release and saving as compared to conventional electrochemical techniques, namely, Fenton, Fenton-like, and Electro-Fenton. A numerical model describing the electrochemical, electrolytic, and phenol’s mineralization reactions is presented. Simulations are conducted to predict the kinetics of ferrous and ferric ions, radicals’ formation, and phenol degradation along with released power. Parametric analysis and comparisons are also performed between the basic configuration of the Galvano-Fenton process and its upgraded version integrating a pre-immersion stage of the electrodes in the electrolyte equivalent to 25% of the total experiment’s duration. The ratio of the initial concentration of $H_2{O}_2$ to the concentration of the released/added $F{e}^{2+}$ catalyst is varied from 10 to 30. The effect of phenol concentration is inspected over the range of 0.188 to 10 mg/L as well. Compared to conventional Fenton-based techniques, the Galvano-Fenton process demonstrated a higher performance by reaching 1.34% of degradation efficiency per released J. This is associated with the generation of hydroxyl radicals of 0.047 nM/released J with initial concentrations of hydrogen peroxide and phenol of 0.187 mM and 2 µM, respectively. Moreover, the integration of the pre-immersion stage allowed the overcoming the barrier of the null degradation rate at the initial instant.

【 授权许可】

Unknown