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Journal article
Production of LiOH·H2O from lithium chloride by electrodialysis and crystallisation
Desalination and water treatment, Vol.320, 100778
2024
Abstract
Laboratory bench scale experiments were performed to develop a process for electrodialysis (ED) of LiCl liquor from spodumene leaching and purification to produce LiOH solution, for subsequent conversion by evaporative crystallisation to LiOH·H2O crystals as the end-product. Nafion® 117 cation-selective membranes were used in all experiments. The small electrolytic test cell achieved an average LiOH production rate of 7.5g/h with 83% coulombic efficiency and specific electrical consumption of 6.5 kWh/kg LiOH. In the large electrolytic test cell, a higher average LiOH production rate of 11.2g/h was attained but at lower coulombic efficiency (62%) and greater specific electrical consumption (8.8 kWh/kg LiOH). In a longer period ED process, there was a further decrease in coulombic efficiency and an increase in the specific electrical consumption. Also, the cation-selective membranes were found susceptible to the deportment of cation and anion impurities (i.e., Na+, K+, and Cl-), which impacted the LiOH·H2O product purity. Higher purity LiOH·H2O was obtained from the LiOH liquor produced in the ED testwork by subjecting the liquor to partial evaporation under a nitrogen gas blanket. Further optimisation of the process parameters is expected to enhance the yield and purity of the LiOH·H2O product and reduce operating costs.
Details
- Title
- Production of LiOH·H2O from lithium chloride by electrodialysis and crystallisation
- Authors/Creators
- Kwang Loon Ang - Engineering and Energy, College of Science, Health, Engineering and Education, Murdoch University, Murdoch, WA 6150, Western Australia, AustraliaMaryam Barmi - Engineering and Energy, College of Science, Health, Engineering and Education, Murdoch University, Murdoch, WA 6150, Western Australia, AustraliaYasaman Boroumand - School of Engineering, Edith Cowan University, Joondalup, WA 6027, AustraliaAmir Razmjou - School of Engineering, Edith Cowan University, Joondalup, WA 6027, AustraliaAleksandar N. Nikoloski - Murdoch University, Centre for Water, Energy and Waste
- Publication Details
- Desalination and water treatment, Vol.320, 100778
- Publisher
- Elsevier Inc
- Identifiers
- 991005703763207891
- Copyright
- © 2024 The Authors.
- Murdoch Affiliation
- School of Engineering and Energy
- Language
- English
- Resource Type
- Journal article
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