Power-free bipolar membrane electrodialysis for acid-alkali production in river estuaries

被引:11
作者
Zhang, Zirui [1 ]
Luo, Fabao [1 ,2 ]
Jiang, Chenxiao [1 ]
Xu, Tongwen [1 ]
机构
[1] Univ Sci & Technol China, Sch Chem & Mat Sci, Anhui Prov Engn Lab Funct Membrane Mat, Hefei 230026, Anhui, Peoples R China
[2] Hefei Normal Univ, Sch Chem & Chem Engn, Hefei 230061, Peoples R China
关键词
Salinity gradient energy; Bipolar membrane electrodialysis; Membrane module; Bulk video imaging; Process optimization; WATER-DISSOCIATION; ENERGY-CONVERSION; TRANSPORT; ELECTROLYSIS;
D O I
10.1016/j.ces.2023.118643
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
Recent studies suggest that 2-2.6 TW blue energy can be harvested by mixing coastal seawater with freshwater world widely, but the extractable part was limited due to undesired development of conver-sion techniques. In this study, a novel power-free bipolar membrane electrodialysis process is proposed for the closed-loop utilization of salinity gradient energy and the salt resources in seawater. The system was evaluated using theoretical and experimental methods. Significance of the various membrane mod-ules and operational conditions was evaluated. Based on fluid dynamics simulations and fluid online imaging technologies, a prototype electro-membrane reactor was fabricated to maximize the achievable energy and acid/base products. The acid production rate reached 6.9 mmol h-1 when feeding simulated seawater (30 g/L NaCl) and river water (1 g/L NaCl). The protocols provided in this work offer an effective route for developing advanced membrane processes for the harvesting of salinity gradient energy and acid-alkali production.@2023 Elsevier Ltd. All rights reserved.
引用
收藏
页数:9
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