Proton Blockage Pvdf-Co-Hfp-Based Anion Exchange Membrane for Sulfuric Acid Enrichment
Recovery of sulfuric acid from industrial wastewater by electrodialysis (ED) has become a hot topic recently. In practical, the traditional anion exchange membranes (AEM) generally lead to the severe proton leakage during ED process. As a result, the efficiency of the acid concentration was seriously affected. In this work, a kind of proton blockage AEM has been prepared via modifying the poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF- co -HFP) with 1-vinylimidazole and 1,4-dibromobutane. In particular, the as-prepared AEM had an asymmetric structure. It was attributed to the different volatility of the solvent. Furthermore, different morphologies were observed on the two sides of the AEM with a smooth and dense surface and a rough and porous surface. The results indicate that this asymmetric structure of the AEM and the fluorinated hydrophobicity of the backbone show the ability of proton leakage. This increases the current efficiency of acid concentration and reduces energy consumption. In ED process, AEM-0.5 exhibits acid enrichment performance ( = 2.04 M) and low energy consumption (1.75 kw·h·kg –1 ) relative to the standard AEM of AHA and proton blockage commercial ACM. This study facilitated the preparation of an acid-blocked AEM
Year of publication: |
[2022]
|
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Authors: | Yu, Shuaijun ; Qian, Hao ; Liao, Junbin ; Dong, Jun ; Yu, Lu ; Liu, Chunhong ; Shen, Jiangnan |
Publisher: |
[S.l.] : SSRN |
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