About this Abstract |
Meeting |
MS&T23: Materials Science & Technology
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Symposium
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Synthesis, Characterization, Modeling and Applications of Functional Porous Materials
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Presentation Title |
Selective Lithium Extraction from Brines and Production Of Battery-Grade LiOH Using Porous H2TiO3 Ion Sieve Adsorbents Integrated with Electrodialysis |
Author(s) |
Greeshma Gadikota, Rajashekhar Marthi, Hassnain Asgar, Akanksh Mamidala, John McLennan, Michael McKibben |
On-Site Speaker (Planned) |
Rajashekhar Marthi |
Abstract Scope |
Lithium demand is projected to increase due to the increasing demand for lithium-ion batteries. To meet this increasing demand, it has become important to directly produce battery-grade LiOH from brine resources. We recently designed an integrated technology that selectively adsorbs lithium from the geothermal brines, at operating temperatures > 100 oC, using porous H2TiO3 ion sieve beads and producing LiOH directly. We showed that H2TiO3 ion sieves, are thermally and chemically stable, and can adsorb over 85% of lithium from the geothermal brines with high lithium selectivity (separation factors > 300). The adsorbed lithium is eluted and concentrated up to 2,000 ppm using dilute acids (pH ~ 1.0). The lithium-rich eluent is further concentrated up to 4,000 ppm and simultaneously converted into LiOH in an electrodialysis unit along with the removal of minor carryover impurities and H2 generation. The obtained pure LiOH solution is evaporated to obtain battery-grade LiOH. |