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EnglishBipolar Membrane Reverse Electrodialysis (BMRED) can be used to produce electricity exploiting acid-base neutralization, thus representing a valuable route in reusing waste streams. The present work investigates the performance of a lab-scale BMRED module under several operating conditions. By feeding the stack with 1 M HCl and NaOH streams, a maximum power density of ∼17Wm-2 was obtained at 100 A m-2 with a 10-triplet stack with a flow velocity of 1 cm s-1, while an energy density of ∼10 kWh m-3 acid could be extracted by a complete neutralization. Parasitic currents along feed and drain manifolds significantly affected the performance of the stack when equipped with a higher number of triplets. The apparent permselectivity at 1 M acid and base decreased from 93% with the five-triplet stack to 54% with the 38-triplet stack, which exhibited lower values (∼35% less) of power density. An important role may be played also by the presence of NaCl in the acidic and alkaline solutions. With a low number of triplets, the added salt had almost negligible effects. However, with a higher number of triplets it led to a reduction of 23.4-45.7% in power density. The risk of membrane delamination is another aspect that can limit the process performance. However, overall, the present results highlight the high potential of BMRED systems as a productive way of neutralizing waste solutions for energy harvesting.
Zaffora A., Culcasi A., Gurreri L., Cosenza A., Tamburini A., Santamaria M., et al. (2020). Energy harvesting by waste acid/base neutralization via bipolar membrane reverse electrodialysis. ENERGIES, 13(20), 5510.
| Data di pubblicazione: | 2020 |
| Titolo: | Energy harvesting by waste acid/base neutralization via bipolar membrane reverse electrodialysis |
| Autori: | |
| Citazione: | Zaffora A., Culcasi A., Gurreri L., Cosenza A., Tamburini A., Santamaria M., et al. (2020). Energy harvesting by waste acid/base neutralization via bipolar membrane reverse electrodialysis. ENERGIES, 13(20), 5510. |
| Rivista: | |
| Digital Object Identifier (DOI): | http://dx.doi.org/10.3390/en13205510 |
| Abstract: | Bipolar Membrane Reverse Electrodialysis (BMRED) can be used to produce electricity exploiting acid-base neutralization, thus representing a valuable route in reusing waste streams. The present work investigates the performance of a lab-scale BMRED module under several operating conditions. By feeding the stack with 1 M HCl and NaOH streams, a maximum power density of ∼17Wm-2 was obtained at 100 A m-2 with a 10-triplet stack with a flow velocity of 1 cm s-1, while an energy density of ∼10 kWh m-3 acid could be extracted by a complete neutralization. Parasitic currents along feed and drain manifolds significantly affected the performance of the stack when equipped with a higher number of triplets. The apparent permselectivity at 1 M acid and base decreased from 93% with the five-triplet stack to 54% with the 38-triplet stack, which exhibited lower values (∼35% less) of power density. An important role may be played also by the presence of NaCl in the acidic and alkaline solutions. With a low number of triplets, the added salt had almost negligible effects. However, with a higher number of triplets it led to a reduction of 23.4-45.7% in power density. The risk of membrane delamination is another aspect that can limit the process performance. However, overall, the present results highlight the high potential of BMRED systems as a productive way of neutralizing waste solutions for energy harvesting. |
| URL: | https://www.mdpi.com/1996-1073/13/20/5510 |
| Settore Scientifico Disciplinare: | Settore ING-IND/26 - Teoria Dello Sviluppo Dei Processi Chimici Settore ING-IND/23 - Chimica Fisica Applicata |
| Appare nelle tipologie: | 1.01 Articolo in rivista |
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