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The Role of Membrane, Feed Characteristic and Process Parameters on RED Power Generation

1Membrane Research Center (MeR-C), Diponegoro University, Indonesia

2Department of Chemical Engineering, Faculty of Engineering, Diponegoro University, Indonesia

3Department of Environmental Engineering, Faculty of Engineering, Diponegoro University, Indonesia

4 Departement of Chemical Engineering, Institut Teknologi Sumatera, Indonesia

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Received: 20 Oct 2022; Revised: 5 Dec 2022; Accepted: 20 Dec 2022; Available online: 31 Dec 2022; Published: 1 Jan 2023.
Editor(s): H Hadiyanto
Open Access Copyright (c) 2023 The Author(s). Published by Centre of Biomass and Renewable Energy (CBIORE)
Creative Commons License This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.

Citation Format:
Reverse electrodialysis (RED) is a renewable energy-generating SGE technique using energy from salinity gradients. This research investigates the effect of membrane and feed characteristics on reverse electrodialysis (RED) power generation. Some investigations on the process parameters effect for the complement of the main study were also conducted. The generated power of RED was measured using power density analysis. The experiments were performed using artificial seawater varied from 0 to 1 g/L NaCl for diluted salt water and from 0 to 40 g/L NaCl for concentrated salt water. In a study of ions type, NaCl non-pa is used to represent monovalent ions, and MgSO4 represents divalent ions. The results showed that the highest voltage generation is 2.004 volts by 14 cells number of the RED membrane utilizing a RED self-made laboratory scale. The power density was enhanced by raising the flow rate (0.10 L/min), concentration difference (40 g/L), and the presence of electrode rinse solution. Further, the ion type (monovalent, divalent, and multivalent) influenced the resulting RED power density, where the divalent ion (MgSO4) 's power density was greater than that of the monovalent ion (NaCl). The resistance and selectivity of the membrane were the major keys for the power generation of RED
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Keywords: Reverse electrodialysis; power density; salinity gradient energy; Gibb free energy

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