Abstract of Contribution 192029

ID: 192029

W) Materials Life Cycle and Sustainability

Oral

Topics: advanced dissolution and separation processes, hydrometallurgy and extractive metallurgy

Keywords: membrane, pertraction, simulation, kinetics, diffusion

Modelling of Membrane and Comparison in the Case of Pertraction Experiments

Jean DUHAMET¹, Johannes THEISEN¹, Helmuth MOEHWALD², Maximilian PLEINES¹, Christophe PENISSON¹, Jean-Christophe P. GABRIEL¹, Thomas ZEMB¹

¹CEA, France; ²Max Planck Inst Colloids & Interfaces, Germany

Porous media in extraction and especially pertraction are often suspected to add unnecessary diffusive resistance and considerably slow down extraction kinetics. In the practical case of the separation of rare earth compounds from water into an organic phase, the use of specific ion binding ligands in high concentrations is required. These tend to form complex liquid crystalline phases preferentially at ion-rich locations inside a pertraction membrane. We will report on the modeling of the behavior of such fluids in the case of pertraction [1] as well as in the case of a miniaturized pertraction device [2]. We will show that diffusive and reactive solute transport can be accurately simulated without any free parameters. Overall, this work can be generalize as enabling the measurement of solute transfer rates at the liquid-liquid interface, a key parameter in pertraction and membrane separation which is difficult to measure using classic methods of extraction.

[1] J. Duhamet, H. Mohwald, M. Pleines, T. Zemb, Self-Regulated Ion Permeation through Extraction Membranes, Langmuir, 33 (2017) 9873-9879.

[2] J. Theisen, C. Penisson, J. Rey, T. Zemb, J. Duhamet, J.C.P. Gabriel, Submitted.