Korean Chemical Engineering Research

  • 제54권5호
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  • Pages.587-592
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  • 2016
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  • 0304-128X(pISSN)
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  • 2233-9558(eISSN)
한국화학공학회 (The Korean Institute of Chemical Engineers)
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고농도 NaBH4 수용액에서 비담지 촉매의 가수분해 반응 특성

Characteristics of Hydrolysis Reaction Using Unsupported Catalyst at High Concentration of NaBH4 Solutions

  • Lee, Hye-Ri (Department of Chemical Engineering, Sunchon National University) ;
  • Na, Il-Chai (CNL Energy Co) ;
  • Park, Kwon-Pil (Department of Chemical Engineering, Sunchon National University)
  • 투고 : 2016.05.12
  • 심사 : 2016.06.16
  • 발행 : 2016.10.01
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초록

휴대용 고분자전해질 연료전지의 수소발생용으로써 $NaBH_4$는 많은 장점을 갖고 있다. 본 연구에서는 고농도 $NaBH_4$ 용액에서 비담지 Co-P-B, Co-B 촉매의 $NaBH_4$ 가수분해 특성에 대해 연구하였다. 고농도에서 수소 발생 수율을 높이기 위해 $NaBH_4$ 가수분해 반응의 수소 발생 수율에 미치는 촉매 형태, $NaBH_4$ 농도, 응축수 회수 등의 영향에 대해 실험하였다. Co-P-B 제조과정에서 붕소의 비가 높아질수록 수소 발생 수율이 증가하였다. Co-P:B = 1:5 촉매를 사용해 $NaBH_4$ 수용액 농도를 20 wt%에서 25 wt%로 증가시켰을 때 수소 발생 수율이 감소하였다. Co-P-B와 Co-B 촉매를 같이 사용한 반응기에서 촉매 팩의 두께를 감소시키고 응축수를 회수하여, $NaBH_4$ 25 wt% 수용액으로 최고 수소 발생수율 96.4%를 얻었다.

Sodium borohydride, $NaBH_4$, shows a number of advantages as hydrogen source for portable proton exchange membrane fuel cells (PEMFCs). Properties of $NaBH_4$ hydrolysis reaction using unsupported Co-P-B Co-B, catalyst at high concentration $NaBH_4$ solution were studied. In order to enhance the hydrogen generation yield at high concentration of $NaBH_4$, the effect of catalyst type, $NaBH_4$ concentration and recovery of condensing water on the hydrogen yield were measured. The yield of hydrogen evolution increased as the boron ratio increased in preparation process of Co-P-B catalyst. The hydrogen yield decreased as the concentration increased from 20 wt% to 25 wt% in $NaBH_4$ solution during hydrolysis reaction using 1:5 Co-P-B catalyst. Maximum hydrogen yield of 96.4% obtained by recovery of condensing water and thinning of catalyst pack thickness in reactor using Co-P-B with Co-B catalyst and 25 wt% $NaBH_4$ solution.

키워드

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피인용 문헌

  1. 활성탄 담지 Co-B/C, Co-P-B/C 촉매를 이용한 NaBH4 가수분해 반응 vol.56, pp.5, 2016, https://doi.org/10.9713/kcer.2018.56.5.641
  2. 바닷물을 이용한 NaBH4 가수분해에 의한 수소발생 vol.57, pp.6, 2016, https://doi.org/10.9713/kcer.2019.57.6.758