Bipolar Membrane Electrodialysis Metathesis System For ...

Skip to main content Not Available for Download Add Paper to My Library Share: Permalink Using these links will ensure access to this page indefinitely Copy URL Bipolar Membrane Electrodialysis Metathesis System for Simultaneous Production of (Nh4)2so4, Naoh, and Hcl from Waste Na2so4

Posted: 23 Mar 2022

See all articles by Ming Zhu

Ming Zhu

Chinese Academy of Sciences (CAS)

Binghui Tian

Chinese Academy of Sciences (CAS)

Sheng Luo

Chinese Academy of Sciences (CAS)

Yongzhi Chi

Tianjin Chengjian University

Aishajiang Dierxiati

Chinese Academy of Sciences (CAS)

Yu Zhang

Chinese Academy of Sciences (CAS)

Min Yang

Chinese Academy of Sciences (CAS)

Abstract

Na 2 SO 4 is generated during zero-liquid discharge treatment of high-salinity wastewater and is of limited industrial use. In this study, a five-compartment bipolar membrane electrodialysis metathesis (BMEDM) system was established to produce (NH 4 ) 2 SO 4 , HCl, and NaOH simultaneously from waste Na 2 SO 4 by adding an equivalent amount of NH 4 Cl. The conditions for optimizing the performance of the BMEDM system in terms of its energy efficiency and conversion ratio were investigated. The inflection point of the stack voltage occurred at a final Na 2 SO 4 concentration of 0.03 mol/L, corresponding to a conductivity of approximately 6 mS/cm in the Na 2 SO 4 compartment, which could be considered the end point of the reaction. In comparison with the widely used bipolar membrane electrodialysis (BMED) system, which could transform the waste salts into an acid and a base, the BMEDM system only consumed a little higher energy to produce three products. The highest (NH 4 ) 2 SO 4 (0.44 mol/L), HCl (1.03 mol/L), and NaOH (1.35 mol/L) concentrations were obtained with an initial Na 2 SO 4 concentration of 0.8 mol/L and a current density of 40 mA/cm 2 , yielding a conversion ratio of up to 96% and energy consumption of 2.961 kWh/kg of Na 2 SO 4 . Without considering the investment cost, the potential product revenue and profit were estimated to be 579.9 USD/t and 178.4 USD/t, respectively. Therefore, the BMEDM system is promising for transforming waste Na 2 SO 4 into widely used products.

Keywords: Waste Na2SO4, Bipolar membrane electrodialysis metathesis (BMEDM), Bipolar membrane electrodialysis (BMED), High-salinity wastewater treatment, Zero-liquid discharge treatment

Suggested Citation: Suggested Citation

Zhu, Ming and Tian, Binghui and Luo, Sheng and Chi, Yongzhi and Dierxiati, Aishajiang and Zhang, Yu and Yang, Min, Bipolar Membrane Electrodialysis Metathesis System for Simultaneous Production of (Nh4)2so4, Naoh, and Hcl from Waste Na2so4. Available at SSRN: https://ssrn.com/abstract=4043611

Ming Zhu

Chinese Academy of Sciences (CAS) ( email )

Chinese Academy of SciencesBeijing, 100190China

Binghui Tian (Contact Author)

Chinese Academy of Sciences (CAS) ( email )

Chinese Academy of SciencesBeijing, 100190China

Sheng Luo

Chinese Academy of Sciences (CAS) ( email )

Chinese Academy of SciencesBeijing, 100190China

Yongzhi Chi

Tianjin Chengjian University ( email )

China

Aishajiang Dierxiati

Chinese Academy of Sciences (CAS) ( email )

Yu Zhang

Chinese Academy of Sciences (CAS) ( email )

Min Yang

Chinese Academy of Sciences (CAS) ( email )

Chinese Academy of SciencesBeijing, 100190China

Not Available for Download

Do you have a job opening that you would like to promote on SSRN?

Place Job Opening

Paper statistics

Abstract Views 398 PlumX Metrics

Related eJournals

• Materials Engineering eJournal

  Follow

  Materials Engineering eJournal

  Subscribe to this fee journal for more curated articles on this topic

  FOLLOWERS 94 PAPERS 44,805

• Chemical Engineering eJournal

  Follow

  Chemical Engineering eJournal

  Subscribe to this fee journal for more curated articles on this topic

  FOLLOWERS 86 PAPERS 30,747

Feedback Feedback to SSRN Feedback (required) Email (required) Submit