Electrochemical recovery of zinc from the spent pickling baths coming from the hot dip galvanizing industry. Potentiostatic operation

An electrochemical reactor was developed to recover zinc from the spent pickling solutions coming from the hot dip galvanizing industry. These solutions mainly contain ZnCl2 and FeCl2 in aqueous HCl media. The effect of the applied potential on the figures of merit (fractional conversion, current ef...

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Autores: Carrillo Abad, Jorge, García Gabaldón, Montserrat|||0000-0003-4254-6733, Ortega Navarro, Emma María|||0000-0001-6902-018X, Pérez-Herranz, Valentín|||0000-0002-4010-0888
Tipo de recurso: artículo
Fecha de publicación:2011
País:España
Institución:Universitat Politècnica de València (UPV)
Repositorio:RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
Idioma:inglés
OAI Identifier:oai:riunet.upv.es:10251/56920
Acceso en línea:https://riunet.upv.es/handle/10251/56920
Access Level:acceso abierto
Palabra clave:Electrochemical deposition
Hydrogen evolution reaction
Iron
Pickling solutions
Zinc electrodeposition
Adverse effect
Applied potentials
Cathodic peak
Cathodic potentials
Conversion rates
Current efficiency
Electrochemical reactor
Electrochemical recovery
Electrode potentials
Figures of merits
Fractional conversion
Hot-dip galvanizing
Hydrogen evolution reactions
Hydrogen generations
I - V curve
Iron deposition
Negative values
Optimum conditions
Pickling baths
Potential values
Potentiostatic operations
Re-dissolution
Space time yield
Specific energy consumption
Synthetic solutions
Voltammetric experiments
Electric reactors
Electrodeposition
Electrolysis
Energy efficiency
Energy utilization
Experiments
Galvanizing
Hydrochloric acid
Hydrogen
Hydrogen production
Pickling
Reduction
Value engineering
Zinc deposits
Zinc
INGENIERIA QUIMICA
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dc.title.none.fl_str_mv Electrochemical recovery of zinc from the spent pickling baths coming from the hot dip galvanizing industry. Potentiostatic operation
title Electrochemical recovery of zinc from the spent pickling baths coming from the hot dip galvanizing industry. Potentiostatic operation
spellingShingle Electrochemical recovery of zinc from the spent pickling baths coming from the hot dip galvanizing industry. Potentiostatic operation
Carrillo Abad, Jorge
Electrochemical deposition
Hydrogen evolution reaction
Iron
Pickling solutions
Zinc electrodeposition
Adverse effect
Applied potentials
Cathodic peak
Cathodic potentials
Conversion rates
Current efficiency
Electrochemical reactor
Electrochemical recovery
Electrode potentials
Figures of merits
Fractional conversion
Hot-dip galvanizing
Hydrogen evolution reactions
Hydrogen generations
I - V curve
Iron deposition
Negative values
Optimum conditions
Pickling baths
Potential values
Potentiostatic operations
Re-dissolution
Space time yield
Specific energy consumption
Synthetic solutions
Voltammetric experiments
Electric reactors
Electrodeposition
Electrolysis
Energy efficiency
Energy utilization
Experiments
Galvanizing
Hydrochloric acid
Hydrogen
Hydrogen production
Pickling
Reduction
Value engineering
Zinc deposits
Zinc
INGENIERIA QUIMICA
title_short Electrochemical recovery of zinc from the spent pickling baths coming from the hot dip galvanizing industry. Potentiostatic operation
title_full Electrochemical recovery of zinc from the spent pickling baths coming from the hot dip galvanizing industry. Potentiostatic operation
title_fullStr Electrochemical recovery of zinc from the spent pickling baths coming from the hot dip galvanizing industry. Potentiostatic operation
title_full_unstemmed Electrochemical recovery of zinc from the spent pickling baths coming from the hot dip galvanizing industry. Potentiostatic operation
title_sort Electrochemical recovery of zinc from the spent pickling baths coming from the hot dip galvanizing industry. Potentiostatic operation
dc.creator.none.fl_str_mv Carrillo Abad, Jorge
García Gabaldón, Montserrat|||0000-0003-4254-6733
Ortega Navarro, Emma María|||0000-0001-6902-018X
Pérez-Herranz, Valentín|||0000-0002-4010-0888
author Carrillo Abad, Jorge
author_facet Carrillo Abad, Jorge
García Gabaldón, Montserrat|||0000-0003-4254-6733
Ortega Navarro, Emma María|||0000-0001-6902-018X
Pérez-Herranz, Valentín|||0000-0002-4010-0888
author_role author
author2 García Gabaldón, Montserrat|||0000-0003-4254-6733
Ortega Navarro, Emma María|||0000-0001-6902-018X
Pérez-Herranz, Valentín|||0000-0002-4010-0888
author2_role author
author
author
dc.contributor.none.fl_str_mv Departamento de Ingeniería Química y Nuclear
Escuela Técnica Superior de Ingeniería Industrial
Instituto Universitario de Seguridad Industrial, Radiofísica y Medioambiental
Generalitat Valenciana
Universitat Politècnica de València
Repositorio Institucional de la Universitat Politècnica de València Riunet
dc.subject.none.fl_str_mv Electrochemical deposition
Hydrogen evolution reaction
Iron
Pickling solutions
Zinc electrodeposition
Adverse effect
Applied potentials
Cathodic peak
Cathodic potentials
Conversion rates
Current efficiency
Electrochemical reactor
Electrochemical recovery
Electrode potentials
Figures of merits
Fractional conversion
Hot-dip galvanizing
Hydrogen evolution reactions
Hydrogen generations
I - V curve
Iron deposition
Negative values
Optimum conditions
Pickling baths
Potential values
Potentiostatic operations
Re-dissolution
Space time yield
Specific energy consumption
Synthetic solutions
Voltammetric experiments
Electric reactors
Electrodeposition
Electrolysis
Energy efficiency
Energy utilization
Experiments
Galvanizing
Hydrochloric acid
Hydrogen
Hydrogen production
Pickling
Reduction
Value engineering
Zinc deposits
Zinc
INGENIERIA QUIMICA
topic Electrochemical deposition
Hydrogen evolution reaction
Iron
Pickling solutions
Zinc electrodeposition
Adverse effect
Applied potentials
Cathodic peak
Cathodic potentials
Conversion rates
Current efficiency
Electrochemical reactor
Electrochemical recovery
Electrode potentials
Figures of merits
Fractional conversion
Hot-dip galvanizing
Hydrogen evolution reactions
Hydrogen generations
I - V curve
Iron deposition
Negative values
Optimum conditions
Pickling baths
Potential values
Potentiostatic operations
Re-dissolution
Space time yield
Specific energy consumption
Synthetic solutions
Voltammetric experiments
Electric reactors
Electrodeposition
Electrolysis
Energy efficiency
Energy utilization
Experiments
Galvanizing
Hydrochloric acid
Hydrogen
Hydrogen production
Pickling
Reduction
Value engineering
Zinc deposits
Zinc
INGENIERIA QUIMICA
description An electrochemical reactor was developed to recover zinc from the spent pickling solutions coming from the hot dip galvanizing industry. These solutions mainly contain ZnCl2 and FeCl2 in aqueous HCl media. The effect of the applied potential on the figures of merit (fractional conversion, current efficiency, space-time yield and specific energy consumption) of the electrochemical reactor was analysed. Voltammetric experiments were performed previously in order to select the optimum conditions to be applied in the electrolysis experiments. From the I-V curves it was inferred that bulk zinc deposition started from potential values more cathodic than -0.99 V. The hydrogen evolution reaction (HER) appeared from -0.45 V and masked the zinc cathodic peak C1, related to bulk zinc deposition, at high HCl concentrations. The presence of HCl inhibited iron deposition in synthetic samples. The additives present in the real baths, which diminish the massive hydrogen generation, allowed the observation of peak C1. The potential values to be applied in the electrolysis experiments were chosen from the voltammetric experiments and ranged between -1 V and -1.75 V. In the absence of iron in solution, as the electrode potential was shifted towards more negative values, the space-time yield of zinc and its fractional conversion increased because of the increase in the electrode roughness and the hydrogen turbulence-promoting action. Simultaneously, the specific energy consumption decreased initially due to the increase in the zinc conversion rate but decreased for the most cathodic potential value due to HER. The presence of iron in synthetic solutions led to a decrease in current efficiency associated with the reverse redox Fe 2+/Fe3+ system and to the enhancement of the HER, which also induced increments in the local pH and the subsequent zinc redissolution for the most cathodic potential values. On the contrary, the additives present in the real spent pickling baths avoided the adverse effects of iron, and zinc electrodeposition was possible even at high cathodic potential values. In fact, a potential value of -1.75 V was selected as the optimum since the conversion, the current efficiency and the space time yield obtained in the real baths were relatively high.
publishDate 2011
dc.date.none.fl_str_mv 2011
2011-09-01
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://riunet.upv.es/handle/10251/56920
url https://riunet.upv.es/handle/10251/56920
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.relation.none.fl_str_mv Universitat Politècnica de València https://doi.org/10.13039/501100004233 PAID-06-08
Generalitat Valenciana https://doi.org/10.13039/501100003359 GV%2F2010%2F029
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Reserva de todos los derechos
http://rightsstatements.org/vocab/InC/1.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Reserva de todos los derechos
http://rightsstatements.org/vocab/InC/1.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
instname:Universitat Politècnica de València (UPV)
instname_str Universitat Politècnica de València (UPV)
reponame_str RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
collection RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
repository.name.fl_str_mv
repository.mail.fl_str_mv
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spelling Electrochemical recovery of zinc from the spent pickling baths coming from the hot dip galvanizing industry. Potentiostatic operationCarrillo Abad, JorgeGarcía Gabaldón, Montserrat|||0000-0003-4254-6733Ortega Navarro, Emma María|||0000-0001-6902-018XPérez-Herranz, Valentín|||0000-0002-4010-0888Electrochemical depositionHydrogen evolution reactionIronPickling solutionsZinc electrodepositionAdverse effectApplied potentialsCathodic peakCathodic potentialsConversion ratesCurrent efficiencyElectrochemical reactorElectrochemical recoveryElectrode potentialsFigures of meritsFractional conversionHot-dip galvanizingHydrogen evolution reactionsHydrogen generationsI - V curveIron depositionNegative valuesOptimum conditionsPickling bathsPotential valuesPotentiostatic operationsRe-dissolutionSpace time yieldSpecific energy consumptionSynthetic solutionsVoltammetric experimentsElectric reactorsElectrodepositionElectrolysisEnergy efficiencyEnergy utilizationExperimentsGalvanizingHydrochloric acidHydrogenHydrogen productionPicklingReductionValue engineeringZinc depositsZincINGENIERIA QUIMICAAn electrochemical reactor was developed to recover zinc from the spent pickling solutions coming from the hot dip galvanizing industry. These solutions mainly contain ZnCl2 and FeCl2 in aqueous HCl media. The effect of the applied potential on the figures of merit (fractional conversion, current efficiency, space-time yield and specific energy consumption) of the electrochemical reactor was analysed. Voltammetric experiments were performed previously in order to select the optimum conditions to be applied in the electrolysis experiments. From the I-V curves it was inferred that bulk zinc deposition started from potential values more cathodic than -0.99 V. The hydrogen evolution reaction (HER) appeared from -0.45 V and masked the zinc cathodic peak C1, related to bulk zinc deposition, at high HCl concentrations. The presence of HCl inhibited iron deposition in synthetic samples. The additives present in the real baths, which diminish the massive hydrogen generation, allowed the observation of peak C1. The potential values to be applied in the electrolysis experiments were chosen from the voltammetric experiments and ranged between -1 V and -1.75 V. In the absence of iron in solution, as the electrode potential was shifted towards more negative values, the space-time yield of zinc and its fractional conversion increased because of the increase in the electrode roughness and the hydrogen turbulence-promoting action. Simultaneously, the specific energy consumption decreased initially due to the increase in the zinc conversion rate but decreased for the most cathodic potential value due to HER. The presence of iron in synthetic solutions led to a decrease in current efficiency associated with the reverse redox Fe 2+/Fe3+ system and to the enhancement of the HER, which also induced increments in the local pH and the subsequent zinc redissolution for the most cathodic potential values. On the contrary, the additives present in the real spent pickling baths avoided the adverse effects of iron, and zinc electrodeposition was possible even at high cathodic potential values. In fact, a potential value of -1.75 V was selected as the optimum since the conversion, the current efficiency and the space time yield obtained in the real baths were relatively high.Authors want to express their gratitude to the Universidad Politecnica de Valencia for the economical support in the project reference PAID-06-08, and to the Generalitat Valenciana for the financing of the project reference GV/2010/029.ElsevierDepartamento de Ingeniería Química y NuclearEscuela Técnica Superior de Ingeniería IndustrialInstituto Universitario de Seguridad Industrial, Radiofísica y MedioambientalGeneralitat ValencianaUniversitat Politècnica de ValènciaRepositorio Institucional de la Universitat Politècnica de València Riunet20112011-09-01journal articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfapplication/pdfhttps://riunet.upv.es/handle/10251/56920reponame:RiuNet. Repositorio Institucional de la Universitat Politécnica de Valénciainstname:Universitat Politècnica de València (UPV)InglésengUniversitat Politècnica de València https://doi.org/10.13039/501100004233 PAID-06-08Generalitat Valenciana https://doi.org/10.13039/501100003359 GV%2F2010%2F029open accesshttp://purl.org/coar/access_right/c_abf2Reserva de todos los derechoshttp://rightsstatements.org/vocab/InC/1.0/info:eu-repo/semantics/openAccessoai:riunet.upv.es:10251/569202026-06-13T07:49:27Z
score 15,301603

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