NaBH4 가수분해용 Co-P-B/Cu 촉매의 내구성 (Durability of Co-P-B/Cu Catalyst for NaBH4 Hydrolysis Reaction)

서지정보

· 발행기관 : 한국화학공학회
· 수록지 정보 : Korean Chemical Engineering Research(HWAHAK KONGHAK) / 50권 / 4호 / 627 ~ 631페이지
· 저자명 : 황병찬, 조아라, 신석재, 최대기, 남석우, 박권필

초록

휴대용 고분자전해질 연료전지의 수소발생용으로써 NaBH4는 많은 장점을 갖고 있다. 본 연구에서는 NaBH4 가수분해 반응용 Co-P-B/Cu 촉매의 내구성에 대해 연구하였다. Co-P-B/Cu 촉매의 내구성 미치는 반응 온도, NaBH4 농도,NaOH 농도, 촉매 소성온도 등의 영향에 대해 실험하였다. 촉매의 내구성은 가수분해 반응 중에 발생하는 gel 형성에영향을 받았다. 즉 gel 형성에 의해 촉매 손실률이 증가하였다. NaBH4 농도가 고농도일 때는 60 oC 이상에서는 gel 형성이 안 되어 촉매 손실률이 낮았다. 그러나 40 oC 이하에서는 gel이 형성되어 촉매 손실률이 증가했다. NaBH4 20 wt%,40 oC에서 NaOH 농도증가에 따라 겔이 형성되어 촉매 손실률이 증가함을 보였다. Co-P-B/Cu 촉매의 높은 온도에서소성은 내구성을 향상시켰지만 촉매 활성을 감소시켰다.

영어초록

Sodium borohydride, NaBH4, shows a number of advantages as hydrogen source for portable proton exchange membrane fuel cells (PEMFCs). The durability of Co-P-B/Cu catalyst for sodium borohydride hydrolysis reaction was studied. The effect of reaction temperature, NaBH4 concentration, NaOH concentration and calcination temperature of catalyst on the durability of Co-P-B/Cu catalyst were measured. The gel formed during hydrolysis reaction affected the durability of catalyst (loss of catalyst). Formation of gel increased the loss of the catalyst. When NaBH4concentration was high and reaction temperature was higher than 60 oC, loss of catalyst was low because gel was not formed. But under the temperature of 40 oC, loss of catalyst increased due to gel formation When NaBH4 concentration was 40 weight % and the reaction temperature was 40 oC, the loss of catalyst increased as the NaOH concentration increased. As the calcination temperature of catalyst decreased, the loss of catalyst decreased and the activity of catalyst decreased. Calcination of the catalyst at high temperature enhanced the durability of catalyst but diminished the activity of catalyst.

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