Acid leaching of LiCoO2 enhanced by reducing agent. Model formulation and validation
| Autor: | Maria Villen-Guzman, Maria del Mar Cerrillo-Gonzalez, Carlos Vereda-Alonso, Jose Miguel Rodriguez-Maroto, Juan Manuel Paz-Garcia |
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| Rok vydání: | 2022 |
| Předmět: |
Environmental Engineering
Materials science Reducing agent H2O2 Health Toxicology and Mutagenesis Extraction (chemistry) Baterias de Litio Public Health Environmental and Occupational Health Context (language use) Hydrochloric acid General Medicine General Chemistry Shrinking core Pollution Peroxide Lithium-ion batteries recycling chemistry.chemical_compound chemistry Reductive leaching Environmental Chemistry Leaching (metallurgy) Diffusion (business) Hydrogen peroxide Biological system |
| Zdroj: | RIUMA. Repositorio Institucional de la Universidad de Málaga instname |
| ISSN: | 0045-6535 |
| DOI: | 10.1016/j.chemosphere.2021.132020 |
| Popis: | In this work, a model has been formulated to describe the complex process of LiCoO2 leaching through the participation of competing reactions in acid media including the effect of H2O2 as reducing agent. The model presented here describes the extraction of Li and Co in the presence and absence of H2O2, and it takes into account the different phenomena affecting the controlling mechanisms. In this context, the model predicts the swift from kinetic control to diffusion control. The model has been implemented and solved to simulate the leaching process. To validate the model and to estimate the model parameters, a set of 12 (in triplicate) extraction experiments were carried out varying the concentration of hydrochloric acid (within the range of 0.5–2.5 M) and hydrogen peroxide (range 0–0.6%v/v). The simulation results match fairly well with the experimental data for a wide range of conditions. Furthermore, the model can be used to predict results with different solid-liquid ratios as well as different acid and oxygen peroxide concentrations. This model could be used to design or optimize a LiCoO2 extraction process facilitating the corresponding economical balance of the treatment. This work has received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska- Curie grant agreement No. 778045 and the “Proyectos I+D+i en el marco del Programa Operativo FEDER Andalucía 2014–2020”, Project no. UMA18-FEDERJA-279. Cerrillo-Gonzalez acknowledges the FPU grant (FPU18/04295) obtained from the Spanish Ministry of Education. Funding for open access charge: Universidad de Málaga / CBUA. |
| Databáze: | OpenAIRE |
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