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Vol. 32 No. 5 (2020): Vol 32 Issue 5

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Concentration of Sulfuric Acid from Spent Acidic Liquor by Cascaded Electrodialysis Using an Interpolymer Anion Exchange Membrane

Beena Sheth
Department of Chemical Engineering, Vishwakarma Government Engineering College (Affiliated to Gujarat Technological University), Chandkheda-382424, India
Kaushik Nath
Department of Chemical Engineering, G.H. Patel College of Engineering & Technology (Affiliated to Gujarat Technological University), Vallabh Vidyanagar-388120, India

Corresponding Author(s) : Beena Sheth

krishna2406@yahoo.com

Asian Journal of Chemistry, Vol. 32 No. 5 (2020): Vol 32 Issue 5

Abstract

Cascaded electrodialysis system has been developed for increasing the concentration of sulfuric acid from aqueous solution using an interpolymer anion exchange (IPA) membrane. Enrichment process was carried out in a cascade of six electrodialyzers at 20.2 mA/cm2 current density. The performance of the process was evaluated rigorously in terms of current efficiency, voltage requirements and processability to enrich the acid concentration. The bench-scale experimental results exhibited the ability of membrane to perform as a low proton leakage membrane and to enrich the sulfuric acid concentration up to 27.93 wt. %. The higher values of current efficiencies were reported to be in the range of 50 to 60 %. Proton leakage through the membrane, acid back diffusion, concentration polarization and solution conductivity were considered to be the limiting factors for acid enrichment and their effects were found significant on current efficiency and voltage requirement.

Keywords

Cascaded electrodialysis Concentration enrichment Interpolymer anion exchange membrane Sulfuric acid
Sheth, B., & Nath, K. (2020). Concentration of Sulfuric Acid from Spent Acidic Liquor by Cascaded Electrodialysis Using an Interpolymer Anion Exchange Membrane. Asian Journal of Chemistry, 32(5), 1169–1176. Retrieved from https://asianpubs.org/index.php/ajchem/article/view/2477
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