SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2024, Vol. 73 ›› Issue (9): 27-33.DOI: 10.1016/j.cjche.2024.03.031

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Pervaporation performance and characterization of hydrophilic ZSM-5 zeolite membranes for high inorganic acid and inorganic salts

Huanxu Teng1, Ronghui You1, Huanyi Li1, Siqi Shao1, Qi Zhou1, Ying Yang1, Ting Wu1, Meihua Zhu1, Xiangshu Chen1, Hidetoshi Kita2   

  1. 1. State-Province Joint Engineering Laboratory of Zeolite Membrane Materials, Institute of Advanced Materials, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, China;
    2. Graduate School of Science and Technology for Innovation, Graduate School Science and Engineering, Yamaguchi University, Ube 755-8611, Japan
  • Received:2023-12-12 Revised:2024-02-29 Accepted:2024-03-17 Online:2024-05-24 Published:2024-11-21
  • Contact: Meihua Zhu,E-mail:zhumeihua@jxnu.edu.cn;Xiangshu Chen,E-mail:cxs66cn@jxnu.edu.cn
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (21868012 and 22368025), Jiangxi Provincial Department of Science and Technology (20171BCB24005 and 20202BAB203011).

Pervaporation performance and characterization of hydrophilic ZSM-5 zeolite membranes for high inorganic acid and inorganic salts

Huanxu Teng1, Ronghui You1, Huanyi Li1, Siqi Shao1, Qi Zhou1, Ying Yang1, Ting Wu1, Meihua Zhu1, Xiangshu Chen1, Hidetoshi Kita2   

  1. 1. State-Province Joint Engineering Laboratory of Zeolite Membrane Materials, Institute of Advanced Materials, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, China;
    2. Graduate School of Science and Technology for Innovation, Graduate School Science and Engineering, Yamaguchi University, Ube 755-8611, Japan
  • 通讯作者: Meihua Zhu,E-mail:zhumeihua@jxnu.edu.cn;Xiangshu Chen,E-mail:cxs66cn@jxnu.edu.cn
  • 基金资助:
    This work was supported by the National Natural Science Foundation of China (21868012 and 22368025), Jiangxi Provincial Department of Science and Technology (20171BCB24005 and 20202BAB203011).

Abstract: The hydrophilic ZSM-5 zeolite membranes are applied to separate the inorganic acid solutions and inorganic acid/inorganic salt mixtures by pervaporation, and the membrane presents good stability, dehydration, and desalination performance. Influences of inorganic acid type (H2SO4, H3PO4, HNO3, and HCl), H2SO4 concentration (1-6 mol·L-1), test temperature (60-90 ℃) and inorganic acid/inorganic salt type (2 mol·L-1 H2SO4 and sulfate, 2 mol·L-1 H3PO4 and phosphate) on the pervaporation performance are investigated in this work. Either for concentrating 3% (mass) H2SO4 solution or consecutive dehydrating 20% (mass) H2SO4 solution, the hydrophilic ZSM-5 zeolite membrane has a good dehydration performance and stability. Even though the H2SO4 concentration and test temperature are increased to 6 M and 90 ℃, only H2O molecules could pass through the membrane and pH value of the permeation is kept neutral. Besides, the membrane has good dehydration and desalination performance for H2SO4/sulfates and H3PO4/phosphate mixtures, and the rejection of natrium salt, molysite, and magnesium is almost 100%.

Key words: Hydrophilic ZSM-5 zeolite membranes, Inorganic acid, Inorganic salt pervaporation, Desalination

摘要: The hydrophilic ZSM-5 zeolite membranes are applied to separate the inorganic acid solutions and inorganic acid/inorganic salt mixtures by pervaporation, and the membrane presents good stability, dehydration, and desalination performance. Influences of inorganic acid type (H2SO4, H3PO4, HNO3, and HCl), H2SO4 concentration (1-6 mol·L-1), test temperature (60-90 ℃) and inorganic acid/inorganic salt type (2 mol·L-1 H2SO4 and sulfate, 2 mol·L-1 H3PO4 and phosphate) on the pervaporation performance are investigated in this work. Either for concentrating 3% (mass) H2SO4 solution or consecutive dehydrating 20% (mass) H2SO4 solution, the hydrophilic ZSM-5 zeolite membrane has a good dehydration performance and stability. Even though the H2SO4 concentration and test temperature are increased to 6 M and 90 ℃, only H2O molecules could pass through the membrane and pH value of the permeation is kept neutral. Besides, the membrane has good dehydration and desalination performance for H2SO4/sulfates and H3PO4/phosphate mixtures, and the rejection of natrium salt, molysite, and magnesium is almost 100%.

关键词: Hydrophilic ZSM-5 zeolite membranes, Inorganic acid, Inorganic salt pervaporation, Desalination