膜科学与技术

Position：Home >> Abstract

Study on the production of high-concerntration inorganic alkali by bipolar membrane electrodialysis

Authors： SUN Xu, LIANG Xian, WU Liang

Units： University of Science and Technology of China

KeyWords： bipolar membrane electrodialysis; bipolar membrane; acid and alkali production from salt; current density

ClassificationCode：TQ31

year,volume(issue):pagination： 2024,44(6):96-106

Abstract：

Bipolar membrane electrodialysis (BPMED) is a promising method for producing acids and alkalis. However, the process is often hindered by co-ion leakage and water molecule migration, which complicates the attainment of high-concentration acid and alkali products. This study explored the optimization of operational parameters in a three-compartment BPMED reactor, using sodium chloride solution as the raw feed, without altering membrane performance. The research investigated the effects of current density, solution flow rate, and initial salt solution concentration on the BPMED process to identify optimal operating conditions. Key performance metrics such as current efficiency, energy consumption, and product yields were calculated at the highest achieved concentrations of acid and alkali. Under typical industrial conditions - specifically, a current density of 50 mA/cm2, a flow rate of 2.0 cm/s, and an initial salt concentration of 1.5 mol/L - the BPMED process demonstrated enhanced performance. The process achieved a current efficiency of 50%, an energy consumption of 1.68 kWh/kg NaOH, a yield of 0.41, a productivity of 0.19 g/(cm2·h), and a maximum alkali concentration of 1.68 mol/L. To further increase the alkali concentration, experimentation with a higher current density of 100 mA/cm2 was conducted, alongside an increase in the initial volume ratio between the raw feed chamber and the acid/alkali chambers. Under conditions ensuring stable BPMED operation, an alkali concentration of up to 3.84 mol/L was achieved. Subsequently, the alkali concentration was further augmented by integrating overflow-saturated solution injection and increasing the initial liquid volume of the acid chamber. Under conditions of 80 mA/cm2 current density, the maximum alkali concentration reached 7.32 mol/L. These findings highlight the potential for optimizing BPMED processes to achieve high-concentration acid and alkali production, providing valuable insights for industrial applications.

Funds：

国家自然科学基金项目（22261132518）

AuthorIntro：

孙旭（1999-），男，山东青岛人，硕士研究生，研究方向为双极膜过程

Reference：

[1]马洪运, 吴旭冉, 王保国. 双极膜分离技术及应用进展[J]. 化工进展, 2013, 32(10): 2274-2278.
[2] Miesiac I, Rukowicz B. Bipolar membrane and water splitting in electrodialysis[J]. Electrocatalysis, 2022, 13: 101-107.
[3]李海宇, 宋卫锋. 膜处理技术在废酸回收中的应用[J]. 膜科学与技术, 2016, 36(3): 136-141.
[4]孙哲, 徐春艳, 韩洪军,等．双极膜电渗析煤化工浓盐水资源化利用试验研究[J]．给水排水， 2020, 56(S2): 225-230,236.
[5]夏敏, 操容, 叶春松,等. 双极膜电渗析技术在工业高含盐废水中的应用[J]. 化工进展, 2018, 37(7): 2820-2829.
[6]Melnikov S S, Mugtamov O A, Zabolotsky V I. Study of electrodialysis concentration process of inorganic acids and salts for the two-stage conversion of salts into acids utilizing bipolar electrodialysis[J]. Sep Purif Technol, 2020, 235: 116198.
[7]Prname R, Mareev S, Nikonenko V, et al. Bipolar membranes: A review on principles, latest develop ments, and applications [J]. J Membr Sci, 2021, 617: 118538.
[8]夏子君. 电渗析技术在零排放中的应用[J]. 膜科学与技术, 2021, 41(4): 129-137.
[9]高艳荣, 王建友, 刘红斌. 双极膜电渗析解离NaCl清洁制备酸碱的实验研究[J]. 膜科学与技术, 2014, 34(3): 96-103.
[10]Jiang G, Li H, Xu M, et al. Sustainable reverse osmosis, electrodialysis and bipolar membrane electrodialysis application for cold-rolling wastewater treatment in the steel industry[J]. J Water Process Eng, 2021, 40: 101968.
[11]Sun X, Lu H, Wang J. Recovery of citric acid from fermented liquid by bipolar membrane electrodialysis[J]. J Clean Prod, 2017, 143: 250-256.
[12]Hung W C, Horng R S, Tsai C H. Effects of process conditions on simultaneous removal and recovery of boron from boronladen wastewater using improved bipolar membrane electrodialysis (BMED) [J]. J Water Process Eng, 2022, 47：102650.
[13]Faucher M, Henaux L, Chaudron C, et al. Electromembrane approach to substantially improve the ecoefficiency of deacidified cranberry juice production: Physicochemical properties, life cycle assessment and ecoefficiency score[J]. J Food Eng, 2020, 273： 109802.
[14]Fu R, Wang H, Yan J, et al. Asymmetric bipolar membrane electrodialysis for acid and base production [J] . AIChE ， 2023, 69(3): e17957.
[15]杨建鑫, 王建友, 张振辉,等. 双极膜电渗析处理精制浓海水制备酸碱[J]. 水处理技术, 2016, 42(5): 17-22.
[16]董隽, 刘春红, 薛上峰,等. 双极膜电渗析应用于高盐废水再生酸碱的影响因素[J]. 膜科学与技术, 2023, 43(1): 116-126.
[17]Abdu S, Sricharoen K, Wong J E,et al. Catalytic polyelectrolyte multilayers at the bipolar membrane interface[J]. ACS Appl Mater Interfaces, 2013, 5(21): 10445-10455.
[18]Zheng Y, Jin Y, Zhang N. Recovery of N, N-dimethylglycine (DMG) from dimethylglycine hydrochloride by bipolar membrane electrodialysis[J]. Chem Eng Process, 2022, 176: 108943.

Service：

【Download】【Collect】

《膜科学与技术》编辑部 Address: Bluestar building, 19 east beisanhuan road, chaoyang district, Beijing; 100029 Postal code; Telephone：010-80492417/010-80485372; Fax：010-80485372 ; Email：mkxyjs@163.com