III. Co-electrodeposition/removal of copper and nickel in a spouted electrochemical reactor / Pengpeng Grimshaw in Industrial & engineering chemistry research, Vol. 50 N° 16 (Août 2011)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 50 N° 16 (Août 2011) . - pp. 9532–9538 Titre : III. Co-electrodeposition/removal of copper and nickel in a spouted electrochemical reactor Type de document : texte imprimé Auteurs : Pengpeng Grimshaw, Auteur ; Joseph M. Calo, Auteur ; George Hradil, Auteur Année de publication : 2011 Article en page(s) : pp. 9532–9538 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Copper Nickel Electrochemical reactor Résumé : Results are presented of an investigation of the co-electrodeposition of copper and nickel from acidic solution mixtures in a cylindrical spouted electrochemical reactor. The effects of solution pH, temperature, and applied current on the metal removal/recovery rate, current efficiency, and corrosion of the deposited metals from the cathodic particles were examined under galvanostatic operation. The quantitative and qualitative behavior of co-electrodeposition of the two metals from their mixtures differs significantly from that of the individual single-metal solutions. This is primarily attributed to the metal displacement reaction between Ni0 and Cu2+. This reaction effectively reduces the corrosion of copper and amplifies that of nickel (at least at high concentrations). It also amplifies the separation of the deposition regimes of the two metals in time, which indicates that the recovery of each metal as a relatively pure deposit from the mixture is possible. It was also shown that nitrogen sparging considerably increases the observed net electrodeposition rates for both metals, considerably more so than from solutions with just the single metals alone. A numerical model of co-electrodeposition, corrosion, metal displacement, and mass transfer in the cylindrical spouted electrochemical reactor is presented that describes the behavior of the experimental copper and nickel removal data quite well. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie200670g [article] III. Co-electrodeposition/removal of copper and nickel in a spouted electrochemical reactor [texte imprimé] / Pengpeng Grimshaw, Auteur ; Joseph M. Calo, Auteur ; George Hradil, Auteur . - 2011 . - pp. 9532–9538. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 16 (Août 2011) . - pp. 9532–9538 Mots-clés : Copper Nickel Electrochemical reactor Résumé : Results are presented of an investigation of the co-electrodeposition of copper and nickel from acidic solution mixtures in a cylindrical spouted electrochemical reactor. The effects of solution pH, temperature, and applied current on the metal removal/recovery rate, current efficiency, and corrosion of the deposited metals from the cathodic particles were examined under galvanostatic operation. The quantitative and qualitative behavior of co-electrodeposition of the two metals from their mixtures differs significantly from that of the individual single-metal solutions. This is primarily attributed to the metal displacement reaction between Ni0 and Cu2+. This reaction effectively reduces the corrosion of copper and amplifies that of nickel (at least at high concentrations). It also amplifies the separation of the deposition regimes of the two metals in time, which indicates that the recovery of each metal as a relatively pure deposit from the mixture is possible. It was also shown that nitrogen sparging considerably increases the observed net electrodeposition rates for both metals, considerably more so than from solutions with just the single metals alone. A numerical model of co-electrodeposition, corrosion, metal displacement, and mass transfer in the cylindrical spouted electrochemical reactor is presented that describes the behavior of the experimental copper and nickel removal data quite well. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie200670g

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