釩液流電池為一種新興的再生能源儲能系統，在充放電的過程中，電池組中質子交換膜會因釩離子堵塞而導致廢棄，為了達到永續經營及循環經濟的目的，本研究將針對該廢棄質子交換膜提出一可行的資源化方式。本研究分為兩部分，第一為使用離子交換法提取廢棄薄膜中釩離子，解決堵塞問題以及回收釩金屬資源；第二部分為以注形成膜方式製備再生薄膜，並分析其基本特性。
第一部分離子交換法階段，本研究首先將廢棄薄膜溶解於50%乙醇水溶液中，測定溶液中釩離子濃度為74 mg/L後，以硫酸氧釩及市售薄膜分散液配置模擬液。在離子交換法批次實驗中，Dowex G26、IRA-200為兩種適合在薄膜溶液中吸附釩的陽離子交換樹脂，兩種樹脂的等溫吸附模型顯示吸附行為符合Langmuir單層吸附模型，且飽和吸附量為94.34mg/g與58.65mg/g，熱力學分析結果得到Dowex G26吸附釩的反應為自發性的吸熱反應。在離子交換管柱實驗中，測得Dowex G26吸附釩在進料流速1 ml/min、操作體積10ml、總操作體積140BV，有飽和吸附量81.855 mg/g，脫附部分使用1 mol/L的HCl進行脫附，總操作體積5BV下有最佳脫附率97.5%，富集液濃度為1596.72ppm，富集比為21.29。金屬沉澱析出使用銨鹽沉釩法，在pH=5、nNH4Cl：nV=2:1條件下，有最佳沉澱率97.8%。
第二部分為再生薄膜成膜及特性分析，首先將經過離子交換後的薄膜溶液，以DMSO置換製備成膜前驅液，接著以注形成膜方式製成再生薄膜，分析該薄膜的基本特性，得到再生薄膜平均膜厚度為209.2μm；薄膜含水率為25.98%；FTIR分析符合售薄膜圖譜但部分峰值不明顯；薄膜離子交換容積為0.565 meq/g；離子導電度為3.62×10-3 S/cm，較於廢棄的膜提升了數倍性能，但尚無法達到與市售薄膜相同的表現。

This study aims to provide a sufficiency and simple method to recycle vanadium resource and recover membrane from waste proton exchange membrane of vanadium flow battery. This study is divided into two parts, which is recovery vanadium by ion exchange and recast of proton exchange membrane. In the first part, the waste membrane was dissolved in 50% ethanol solution to obtain membrane dispersion which concentration of vanadium was 74 mg/L. In the ion exchange batch experiment, the adsorptive behavior of the cation exchange resin Dowex G26 was correspond to Langmuir model and the maximum adsorb capacity were 94.34. The adsorption and elution column experiment was carried out by Dowex G26 resin. The optimal parameter of adsorption part was flow rate 1ml/min, BV=10ml and total 140BV, and the saturated adsorption capacity reach 81.855 mg/g. In elution part, 1 mol/L HCl, total 5BV was used to elute vanadium from resin, and the concentration of enrichment solution was 1596.72 ppm which elution efficiency was 97.5%. The vanadium was precipitated by adjusting pH value to 5 and adding NH4Cl to obtain the solid ammonium metavanadate. The ammonium metavanadate was calcined in 450oC and 12 hours to get vanadium(V) oxide. In the second part, the dispersion was recast to obtain recycled membrane. The recycle membrane has average thickness 209.2μm, moisture 25.98%, ion exchange capacity 0.565 meq/g and ion conductivity 3.62×10-3 S/cm.

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