近年來，氫能技術的發展與燃料電池的應用逐漸受到產業界關注，而其中氫氣的來源更是此領域中的一項重要議題。電化學泵作為質子交換膜燃料電池的延伸技術，具備將含氫混合氣體純化並加壓為高純氫氣的功能。電化學氫氣回收法主要以質子交換膜作為電解質，促使氫氣中的氫質子由陽極通過膜至陰極，並於陰極端與外部提供的電子結合，生成氫氣。此過程可有效回收工業製程中排放的多餘氫氣。
本研究針對電化學泵在不同操作條件下的性能進行評估，旨在找出最佳操作參數。本實驗使用 Gore M820.15 型號薄膜之電化學泵可在含 25%氫氣濃度之混和氣中，電流密度達 530 mA/cm2，換算為氫氣回收率為 91.88%，能量回收率則為 67.8%，而回收氫氣純度部分，使用 Nafion 117 薄膜之電化學泵可高達 99.92%。而本實驗亦探討不同厚度薄膜之電化學性能、穩定性測試、電化學阻抗分析、薄膜氮氣滲透率及回收氫氣濃度。研究結果顯示，電化學泵搭載厚度較薄之薄膜會有較好的性能表現，然而在回收之氫氣濃度卻低於搭載較厚薄膜之電化學泵，也可在薄膜氮氣滲透率實驗中發現厚度較厚之薄膜展現較好的氣體阻隔性。

This study evaluates the performance of electrochemical hydrogen pumps under various operating conditions, aiming to identify optimal operational parameters. The electrochemical pump employing a Gore M820.15 membrane achieved a current density of 530 mA/cm² when operating with a 25% hydrogen gas mixture, corresponding to a hydrogen recovery rate of 91.88% and an energy recovery efficiency of 67.8%. In terms of recovered hydrogen purity, the electrochemical pump with a NafionTM N117 membrane achieved a purity as high as 99.92%. Furthermore, this study explores the electrochemical performance and stability of membranes with different thicknesses, electrochemical impedance spectroscopy (EIS), nitrogen gas permeability, and the concentration of recovered hydrogen. The results indicate that electrochemical pumps equipped with thinner membranes demonstrate superior performance; however, the recovered hydrogen concentration is lower than that achieved using thicker membranes. This trend is also reflected in nitrogen permeability tests, where thicker membranes exhibit better gas barrier properties.

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