SEArcularMINE project aims to recover critical raw materials (CRMs) from brines from saltworks, thus facing the CRM shortage within Europe. To promote a fully circular scheme, the project valorises concentrated brines using Electrodialysis with Bipolar Membranes (EDBM) to generate the required amounts of reactants (i.e., acids and bases). The performance of new non-woven cloth ion exchange membranes (Suez): i) an ultra-thin non-woven polyester cloth, and ii) a thin poly-propylene cloth acting as their support structure was assessed. Additionally, the anion layer in-cludes a catalyst to promote the water dissociation reaction. The effect of current density (100, 200 and 300 A m-2) on the performance of two combinations of membranes in an inter-laboratory exercise using 2 M NaCl was evaluated. According to statistical analysis ANOVA, there was an agreement on the results obtained in both laboratories. NaOH/HCl solutions up to 0.8 M were generated working at 300 A m-2 using both combinations of membranes. Regarding performance parameters, stack set-ups incorporating ultra-thin polypropylene membranes showed lower Specific Energy Consumption (SEC) and higher Specific Productivity (SP) than thin polypropylene ones. Hence, ultra-thin polypropylene membranes reported SEC between 2.18 and 1.69 kWh kg-1NaOH and SP between 974 and 314 kg m-2 y-1.

Tamara León, Syed Abdullah Shah, Julio López, Andrea Culcasi, Lluis Jofre, Andrea Cipollina, et al. (2022). Electrodialysis with Bipolar Membranes for the Generation of NaOH and HCl Solutions from Brines: An Inter-Laboratory Evaluation of Thin and Ultrathin Non-Woven Cloth-Based Ion-Exchange Membranes. MEMBRANES, 12(12) [10.3390/membranes12121204].

Electrodialysis with Bipolar Membranes for the Generation of NaOH and HCl Solutions from Brines: An Inter-Laboratory Evaluation of Thin and Ultrathin Non-Woven Cloth-Based Ion-Exchange Membranes

Syed Abdullah Shah;Andrea Culcasi
;
Andrea Cipollina;Alessandro Tamburini;Giorgio Micale
2022-12-01

Abstract

SEArcularMINE project aims to recover critical raw materials (CRMs) from brines from saltworks, thus facing the CRM shortage within Europe. To promote a fully circular scheme, the project valorises concentrated brines using Electrodialysis with Bipolar Membranes (EDBM) to generate the required amounts of reactants (i.e., acids and bases). The performance of new non-woven cloth ion exchange membranes (Suez): i) an ultra-thin non-woven polyester cloth, and ii) a thin poly-propylene cloth acting as their support structure was assessed. Additionally, the anion layer in-cludes a catalyst to promote the water dissociation reaction. The effect of current density (100, 200 and 300 A m-2) on the performance of two combinations of membranes in an inter-laboratory exercise using 2 M NaCl was evaluated. According to statistical analysis ANOVA, there was an agreement on the results obtained in both laboratories. NaOH/HCl solutions up to 0.8 M were generated working at 300 A m-2 using both combinations of membranes. Regarding performance parameters, stack set-ups incorporating ultra-thin polypropylene membranes showed lower Specific Energy Consumption (SEC) and higher Specific Productivity (SP) than thin polypropylene ones. Hence, ultra-thin polypropylene membranes reported SEC between 2.18 and 1.69 kWh kg-1NaOH and SP between 974 and 314 kg m-2 y-1.
dic-2022
Settore ING-IND/26 - Teoria Dello Sviluppo Dei Processi Chimici
Tamara León, Syed Abdullah Shah, Julio López, Andrea Culcasi, Lluis Jofre, Andrea Cipollina, et al. (2022). Electrodialysis with Bipolar Membranes for the Generation of NaOH and HCl Solutions from Brines: An Inter-Laboratory Evaluation of Thin and Ultrathin Non-Woven Cloth-Based Ion-Exchange Membranes. MEMBRANES, 12(12) [10.3390/membranes12121204].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10447/585219
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