Electrowinning of iron from sulphate solutions

Mostad, Elise; Rolseth, Sverre; Thonstad, J.

doi:10.1016/j.hydromet.2007.07.014

Cited by 32 publications

(30 citation statements)

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“…For iron recovery, however, with its lower intrinsic value, these factors significantly reduce the profitability and feasibility of the EW process. An additional disadvantage during the EW of iron is the oxidation of Fe(II) to Fe(III) due to oxygen evolution occurring at the anode, reducing the efficiency of the EW process even further [8].…”

Section: Introductionmentioning

confidence: 99%

Electrowinning of Iron from Spent Leaching Solutions Using Novel Anion Exchange Membranes

et al. 2019

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In the Pyror process, electrowinning (EW) is used to recover acid and iron from spent leaching solutions (SLS), where a porous Terylene membrane acts as a separator between the cathode and anode. In this study, a novel anion exchange membrane (AEM)-based EW process is benchmarked against a process without and with a porous Terylene membrane by comparing the current efficiency, specific energy consumption (SEC), and sulfuric acid generation using an in-house constructed EW flow cell. Using an FAP-PK-130 commercial AEM, it was shown that the AEM-based process was more efficient than the traditional processes. Subsequently, 11 novel polybenzimidazole (PBI)-based blend AEMs were compared with the commercial AEM. The best performing novel AEM (BM-5), yielded a current efficiency of 95% at an SEC of 3.53 kWh/kg Fe, which is a 10% increase in current efficiency and a 0.72 kWh/kg Fe decrease in SEC when compared to the existing Pyror process. Furthermore, the use of the novel BM-5 AEM resulted in a 0.22 kWh/kg Fe lower SEC than that obtained with the commercial AEM, also showing mechanical stability in the EW flow cell. Finally, it was shown that below 5 g/L Fe, side reactions at the cathode resulted in a decrease in process efficiency, while 40 g/L yielded the highest efficiency and lowest SECs.

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Section: Introductionmentioning

confidence: 99%

Electrowinning of Iron from Spent Leaching Solutions Using Novel Anion Exchange Membranes

et al. 2019

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“…Modified with permission from ref. 8. aqueous iron electrowinning [80][81][82][83], which is hindered by the high thermodynamic potential (E ∘ = 1.28 V) and diminished kinetics at low temperature.…”

Section: Step Ironmentioning

confidence: 99%

High‐Solar‐Efficiency Utilization of CO₂: the STEP (Solar Thermal Electrochemical Production) of Energetic Molecules

Licht¹

2014

Green Carbon Dioxide

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“…[ 76 , 77 ] Other attempts [ 77 ] have focused on iron electrodepostion from molten mixed halide electrolytes, which has not provided a successful route to form iron, [ 78 , 79 ] , or aqueous iron electrowinning [80][81][82][83] that is hindered by the high thermodynamic potential (E ° = 1.28 V) and diminished kinetics at low temperature.…”

Section: Step Of Ironmentioning

confidence: 99%

Efficient Solar‐Driven Synthesis, Carbon Capture, and Desalinization, STEP: Solar Thermal Electrochemical Production of Fuels, Metals, Bleach

2011

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STEP (solar thermal electrochemical production) theory is derived and experimentally verified for the electrosynthesis of energetic molecules at solar energy efficiency greater than any photovoltaic conversion efficiency. In STEP the efficient formation of metals, fuels, chlorine, and carbon capture is driven by solar thermal heated endothermic electrolyses of concentrated reactants occuring at a voltage below that of the room temperature energy stored in the products. One example is CO(2) , which is reduced to either fuels or storable carbon at a solar efficiency of over 50% due to a synergy of efficient solar thermal absorption and electrochemical conversion at high temperature and reactant concentration. CO(2) -free production of iron by STEP, from iron ore, occurs via Fe(III) in molten carbonate. Water is efficiently split to hydrogen by molten hydroxide electrolysis, and chlorine, sodium, and magnesium from molten chlorides. A pathway is provided for the STEP decrease of atmospheric carbon dioxide levels to pre-industial age levels in 10 years.

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Electrowinning of iron from sulphate solutions

Cited by 32 publications

References 1 publication

Electrowinning of Iron from Spent Leaching Solutions Using Novel Anion Exchange Membranes

Electrowinning of Iron from Spent Leaching Solutions Using Novel Anion Exchange Membranes

High‐Solar‐Efficiency Utilization of CO₂: the STEP (Solar Thermal Electrochemical Production) of Energetic Molecules

Efficient Solar‐Driven Synthesis, Carbon Capture, and Desalinization, STEP: Solar Thermal Electrochemical Production of Fuels, Metals, Bleach

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Electrowinning of iron from sulphate solutions

Cited by 32 publications

References 1 publication

Electrowinning of Iron from Spent Leaching Solutions Using Novel Anion Exchange Membranes

Electrowinning of Iron from Spent Leaching Solutions Using Novel Anion Exchange Membranes

High‐Solar‐Efficiency Utilization of CO2: the STEP (Solar Thermal Electrochemical Production) of Energetic Molecules

Efficient Solar‐Driven Synthesis, Carbon Capture, and Desalinization, STEP: Solar Thermal Electrochemical Production of Fuels, Metals, Bleach

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High‐Solar‐Efficiency Utilization of CO₂: the STEP (Solar Thermal Electrochemical Production) of Energetic Molecules