SOLID POLYMER ELECTROLYTE FUEL BATTERY SYSTEM AND OPERATION METHOD FOR THE SAME
PROBLEM TO BE SOLVED: To suppress deterioration of an electrode when ammonia contained in fuel gas is removed in a solid polymer electrolyte fuel battery.SOLUTION: In a solid polymer electrolyte fuel battery system including a fuel battery 4 having a fuel electrode 2a to be supplied with fuel gas co...
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Zusammenfassung: | PROBLEM TO BE SOLVED: To suppress deterioration of an electrode when ammonia contained in fuel gas is removed in a solid polymer electrolyte fuel battery.SOLUTION: In a solid polymer electrolyte fuel battery system including a fuel battery 4 having a fuel electrode 2a to be supplied with fuel gas containing hydrogen, an oxidant electrode 2b to be supplied with oxygen-containing oxidant gas, and a polymer electrolyte membrane 1 sandwiched between the fuel electrode and the oxidant electrode, and a controller 7, the controller 7 sets the fuel electrode 2a to a predetermined potential so as to promote a reaction of generating dinitrogen monoxide from ammonia and water contained in fuel gas, whereby ammonia and water contained in the fuel gas make an electrochemical oxidation reaction to generate dinitrogen monoxide, and reduction of the three-phase interface of the electrode can be suppressed. Accordingly, it is possible to improve the power generation efficiency and durability of the fuel battery system.SELECTED DRAWING: Figure 1
【課題】固体高分子電解質形燃料電池において、燃料ガスに含まれるアンモニアを除去する際に、電極の劣化を抑える。【解決手段】水素を含む燃料ガスが供給される燃料極2aと、酸素を含む酸化剤ガスが供給される酸化剤極2bと、燃料極及び酸化剤極の間に挟まれた高分子電解質膜1とを備える、燃料電池4と、制御部7とを備え、制御部7は、燃料ガスに含まれるアンモニアと水から一酸化二窒素が生成される反応が促進されるように、燃料極2aを所定の電位とする固体高分子電解質形燃料電池システムとすることにより、燃料ガスに含まれるアンモニアと水が電気化学的な酸化反応を起こし一酸化二窒素が生成され、電極の三相界面の減少を抑制することができる。これにより、燃料電池システムの発電効率と耐久性の向上を図ることができる。【選択図】図1 |
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