화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Chemical Engineering Research, Vol.51, No.1, 35-41, February, 2013
Export Citation
Co-P-B/FeCrAlloy 촉매를 이용한 NaBH4 가수분해 반응
NaBH4 Hydrolysis Reaction Using Co-P-B Catalyst Supported on FeCrAlloy
황병찬, 조아라, 신석재1, 최대기1, 남석우1, 박권필†
  • 순천대학교 화학공학과, 540-742 전남 순천시 매곡동 315
  • 1한국과학기술연구원 연료전지센터, 136-791 서울 성북구 하월곡동 39-1
Byungchan Hwang, Ara Jo, Sukjae Sin1, Daeki Choi1, Sukwoo Nam1, and Kwonpil Park†
  • Department of Chemical Engineering, Sunchon National University, 315 Maegok-dong, Suncheon, Jeonnam 540-742, Korea
  • 1Fuel Cell Research Center, Korea Institute of Science and Technology, 39-1 Hawolkok-dong, Seongbuk-gu, Seoul 136-791, Korea
E-mail:
초록
Co-P-B/FeCrAlloy 촉매의 NaBH4 가수분해 특성과 내구성에 대해 연구하였다. 5 wt% NaBH4 농도에서 활성화 에너지가 25.2 kJ/mol로 귀금속 촉매와 비슷했고, NaBH4 농도가 증가할수록 활성화 에너지가 증가하였다. 20 wt% 이상의 NaBH4 농도에서 겔 형성이 수소발생과 촉매 내구성에 많은 영향을 줬다. NaBH4 농도가 높을 때 반응온도가 높을수록 겔 형성이 안 되므로 촉매 손실률이 낮았다. 수소발생과 촉매 내구성을 모두 고려했을 때 담지체를 1,000 ℃에서 열처리하고, 초음파 진동없이 촉매를 담지하고, 촉매 담지 후 소성한 촉매가 우수하였다. 25 wt% NaBH4에서는 촉매를 3회 이상 재사용하기 위해서는 60 ℃ 이상의 온도에서 반응시켜야 함을 보였다.
Properties of NaBH4 hydrolysis reaction using Co-P-B/FeCrAlloy catalyst and the catalyst durability were studied. Co-P-B/FeCrAlloy catalyst showed low activation energy such as 25.2 kJ/mol in 5 wt% NaBH4 solution, which was similar that of noble metal catalyst. The activation energy increased as the NaBH4 concentration increased. Formation of gel at high concentration of NaBH4 seriously affected hydrogen evolution rate and the catalyst durability. The catalyst loss decreased as reaction temperature increased due to lower gel formation when the concentration of NaBH4 was over 20 wt%. Considering hydrogen generation rate and durability of catalyst, the catalyst supported with FeCrAlloy heat-treated at 1000 ℃ without ultra vibration during dipping and calcination after catalyst dipping was best catalyst. To use catalyst more than three times in 25 wt% NaBH4 solution, it should be reacted at higher temperature than 60 ℃.
Keywords:Sodium Borohydride;Durability;Catalyst;Co-P-B;Hydrolysis;FeCrAlloy;Fuel Cell
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