Metal Foam Electrode as a Cathode for Copper Electrowinning

Vainoris, Modestas; Cesiulis, H.; Цынцару, Н.

doi:10.3390/coatings10090822

Cited by 20 publications

(13 citation statements)

References 50 publications

(75 reference statements)

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“…The specific surface area of Ni foam is about five times that of Cu foam (Table S2). The electrode with a larger specific surface area has a larger active area and a lower charge transfer resistance, which effectively improve the electrodeposition of Cu 2+ . The cathode current efficiency of a Ni plate with the same specific surface area is less than that of a Cu plate.…”

Section: Resultsmentioning

confidence: 99%

Cu(II)-Assisted CO₂Absorption and Desorption Performances of the MMEA–H₂O System

et al. 2021

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The complexation of metal ions and amines can mediate the chemical equilibrium and the thermal effect between amines and CO 2 , thus promoting the absorption and desorption of CO 2 in amine absorbents. In this work, the effects of Cu(II) on the performances of CO 2 absorption and desorption in the Cu(II)− MMEA (2-(methylamino)ethanol)−H 2 O system were studied. The thermal desorption results show that the temperature increase during CO 2 absorption can be mitigated in the presence of Cu(II), and the desorption performance of CO 2 can be obviously improved at 75−95 °C. Using the thermal desorption at 85 °C, the CO 2 desorption efficiency of MMEA solution containing 0.1 M [Cu] is 16.4% higher than that without cupric ions, and the regeneration energy consumption is reduced by 25%. The electrochemical research results indicate that the electrode structure and temperature affect the electrolysis rate of anodic copper, and the temperature is the key factor to enhance the CO 2 desorption rate. Only considering the decomposition voltage, the energy consumption of the absorbent regeneration is 0.5 GJ/t CO 2 at 50 °C, which is much lower than that of the thermal desorption method. The anode current efficiency is always about 100%. Increasing the temperature can increase the cathode current efficiency. When nickel foam with a large specific surface area is used as the cathode, the current efficiency can be increased to 100% at 50 °C. The CO 2 desorption is significantly improved in a Cu(II)-assisted MMEA−H 2 O system. The electrochemical method can achieve a desired desorption at a relatively low temperature and greatly reduce the energy consumption of amine absorbent regeneration.

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Section: Resultsmentioning

confidence: 99%

Cu(II)-Assisted CO₂Absorption and Desorption Performances of the MMEA–H₂O System

et al. 2021

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“…Four individual samples with similar characteristics were manufactured and stacked to assemble the compact heat exchanger setup shown in Figure 1c. ZA27 foams exhibit a macroscopic density of 1.28-1.36 g/cm 3 and an interconnected porosity of 72-74 vol.% [15]. To contain the external mass flow through the foam, the assembly was enclosed by a plexiglass tube.…”

Section: Methodsmentioning

confidence: 99%

“…Open-cell metallic foams combine a highly conductive metallic matrix with a large volumetric surface area. This combination suggests their use for functional applications such as heat exchangers [2], electrodes [3] or sound absorbers [4].…”

Section: Introductionmentioning

confidence: 99%

Manufacturing and Characterization of Tube-Filled ZA27 Metal Foam Heat Exchangers

Fiedler

Moore

Movahedi

2021

Metals

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This study investigates the heat transfer performance of a novel ZA27 metal foam heat exchanger. An open-celled metal foam is combined with a thin-walled copper tube in a single-step casting process. The heat transfer between two separated water streams flowing through the copper tube and foam, respectively, is measured and compared to an equivalent shell tube heat exchanger arrangement. Heat transfer enhancement of up to 71% and a heat transfer rate exceeding 30 kW are observed and attributed to the increased surface area of the metallic foam. However, overall performance was limited by the inefficient heat transfer between the internal mass stream and the copper tube.

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“…DEL is thin enough in the moderately concentrated solutions (tens of nanometers), and replicates all surface irregularities that are higher than the thickness of DEL. The peculiarities of mass-transport, charge transfer and charging of DEL on the foam electrode were described in ( Vainoris et al, 2020 ). The fabricated Fe/Cu-foam catalyst seems an attractive substrate for catalysts as the effective surface area of the foam is from 7 to 14 times bigger than the geometrical area of the smooth surface ( Vainoris et al, 2020 ).…”

Section: Introductionmentioning

confidence: 99%

Electrodeposited Fe on Cu foam as advanced fenton reagent for catalytic mineralization of methyl orange

Vainoris

Nicolenco²,

Цынцару³

et al. 2022

Front. Chem.

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In many countries, the textile industry remains the major contributor to environmental pollution. Untreated textile dyes discharged into water negatively impact the performance of aquatic organisms and may cause a variety of serious problems to their predators. Effective wastewater treatment is a key to reducing environmental and human health risks. In this work, the Fe/Cu catalysts were used in heterogeneous Fenton’s reaction for the degradation of high concentrations of methyl orange (model azo dye) in aqueous solutions. For the first time, the catalysts were prepared onto commercial copper foams by potentiostatic electrodeposition of iron using an environmentally friendly electrolyte. The influence of electrodeposition conditions, H2O2 concentration, dye concentration and temperature on the model dye degradation was investigated. It was revealed that both the surface area and the catalyst loading play the major role in the effective dye degradation. The experimental results involving spectrophotometric measurements coupled with total carbon and nitrogen quantification suggest that a solution containing up to 100 mg/L of methyl orange can be successfully decolorized within 90 s at 50°C using porous Fe/Cu catalyst in the presence of hydrogen peroxide that largely surpasses the current state-of-the-art performance. Already within the first 10°min, ∼ 30% of total methyl orange concentration is fully mineralized. The described process represents a cost-efficient and environmentally friendly way to treat azo dyes in aqueous solutions.

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Metal Foam Electrode as a Cathode for Copper Electrowinning

Cited by 20 publications

References 50 publications

Cu(II)-Assisted CO₂Absorption and Desorption Performances of the MMEA–H₂O System

Cu(II)-Assisted CO₂Absorption and Desorption Performances of the MMEA–H₂O System

Manufacturing and Characterization of Tube-Filled ZA27 Metal Foam Heat Exchangers

Electrodeposited Fe on Cu foam as advanced fenton reagent for catalytic mineralization of methyl orange

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Metal Foam Electrode as a Cathode for Copper Electrowinning

Cited by 20 publications

References 50 publications

Cu(II)-Assisted CO2Absorption and Desorption Performances of the MMEA–H2O System

Cu(II)-Assisted CO2Absorption and Desorption Performances of the MMEA–H2O System

Manufacturing and Characterization of Tube-Filled ZA27 Metal Foam Heat Exchangers

Electrodeposited Fe on Cu foam as advanced fenton reagent for catalytic mineralization of methyl orange

Contact Info

Product

Resources

About

Cu(II)-Assisted CO₂Absorption and Desorption Performances of the MMEA–H₂O System

Cu(II)-Assisted CO₂Absorption and Desorption Performances of the MMEA–H₂O System