Proton blockage PVDF-co-HFP-based anion exchange membrane for sulfuric acid recovery in electrodialysis

Techno-Economic Analysis of Bipolar Membranes Electrodialysis for the Hexacyanocobalic Acid Green Conversion

“…Consequently, the migration rate of K + into the base compartment decreased, resulting in a reduced acid production rate. Although the concentration of KOH in the base compartment slightly increased, it was not significantly enhanced due to the leakage of H + ions. , …”

“…Although the concentration of KOH in the base compartment slightly increased, it was not significantly enhanced due to the leakage of H + ions. 38,39 The influence of different volume ratios on the current efficiency and SEC is shown in Figure 10. As the volume ratio of the acid−base compartment increased from 1:2 to 2:1, the current efficiency increased from 54.9 to 68.1%.…”

Bifunctional Crosslinker Enables Antifouling PVA-Based Anion Exchange Membranes with Enhanced Dimensional Stability for Electrodialysis Applications

“…Three typical characteristic regions are observed in Figure a. The first stage is the ohmic region, where the current is proportional to the voltage; the second stage is the plateau zone, where the current approaches the limit; the third stage is the overlimit region, where the current rises sharply and the phenomenon of concentration polarization occurs. , As displayed in Figure b, with the increased amount of Bpy-CHO introduced, the limiting current density of PVA-Bpy-CHO- X AEMs is enhanced from 11.45 to 20.96 mA·cm –2 . In conclusion, the as-prepared AEMs present high limited current density, indicating their potential to be applied in ED desalination.…”

Remediation and recycling of inorganic acids and their green alternatives for sustainable industrial chemical processes

“…Yu et al modified poly(vinylidene fluoride- co -hexafluoropropylene) (PVDF- co -HFP) with 1-vinylimidazole before crosslinking with 1,4-dibromobutane to create a sequence of proton blockage cross-linking in an AEM. 356 The PVDF- co -HFP-based AEM was reported to have an apparent asymmetric structure on its two sides, with a smooth and dense surface and a rough and porous surface. The fluorinated backbone of AEM's asymmetric structure and hydrophobicity result in greater proton blocking performance, higher electrical efficiency, and less energy-intensive acid recovery.…”