本研究利用質子交換膜燃料電池(PEMFC)作為電化學泵(Electrochemical Pump)媒介，進而達到殘餘氫氣回收之目的。一般燃料電池為利用氫氣與氧氣經電化學反應產生電能和水。然而電化學泵的機制乃是利用陽極端的氫氣通過質子交換膜還原成氫離子，此時再由外部電源提供電子，進而在陰極處結合形成氫氣藉由此種方式可以有效的將多餘的氫氣回收再利用並節省陽極端燃料的浪費。然而在本研究中也針對陽極增濕溫度以及電化學泵溫度進行操作參數對燃料電池回收氫氣速率影響之探討。
依據本研究所進行之實驗，吾人發現在陽極增濕溫度與電化學泵操作溫度皆為50 oC下為電化學泵最佳操作參數，且能量回收效率可達47%。並利用實驗結果所得到之電化學泵最佳操作參數於陰極出口端對回收之氣體進行建壓並觀察壓力與時間之變化，此增壓過程之目的為提高氣體壓力足以重新導回燃料入口端，並使用雙級增壓系統再次提升回收氣體壓力。再者，分析不同氫氣濃度經由電化學泵純化之尾氣以及一氧化碳對於電化學泵性能之影響也於本實驗中進行探討。

In this study, a polymer electrolyte membrane (PEM) fuel cell is used as a hydrogen recovery device based on the theory of electrochemical pumps. Contrast to standard fuel cells which generate electricity and water due to the electrochemical reaction, the fuel cell does not generate electricity. Electrochemical pumps consume power to pump ion of hydrogen across the polymer electrolyte membrane to react with electrons and generate hydrogen in the cathode. This way can recovery hydrogen effectively and reduce fuel that the waste while using the anodic water removal method. However, it was treated anodic humidification temperatures and different cell temperatures with different applied voltage to find the better performance when the system connected with the electrochemical pumps.
From the analysis of experimental data it is possible to evaluate the performance of hydrogen recovery effects on different anodic humidification temperatures, different cell temperatures. Results shows that when cell temperature at 50 oC and anode humidification temperature at 50 oC the performance of hydrogen recovery rate is better than others and the energy recovery efficiency of electrochemical pumps in this operation situation can get to 47%. Using electrochemical pumps to enhance the pressure of cathode volume may be pressurize the hydrogen at the different applied voltage so it can pump up or separate hydrogen from the low pressure anode to the high pressure cathode and the method of two stage electrochemical pumps can pressurize the recovery hydrogen from the first electrochemical pump again. On the other hand, gas purity measurements of the nitrogen/hydrogen mixture gas were performed and the effects of the carbon monoxide poisoning on electrochemical pump performance were achieved.

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