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Language: korean

Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received July 8, 2019
Accepted August 21, 2019
Available online December 3, 2019

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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바닷물을 이용한 NaBH4 가수분해에 의한 수소발생

Generation of Hydrogen from Hydrolysis Reaction of NaBH4 Using Sea Water

이대웅 오소형 김준성 김동호 박권필^†

Daewoong Lee Sohyeong Oh Junseong Kim Dongho Kim Kwon-Pil Park^†

순천대학교 화학공학과, 57922 전라남도 순천시 중앙로 235

Department of Chemical Engineering, Sunchon National University, 235, Jungang-ro, Suncheon-si, Jeollanam-do, 57922, Korea

parkkp@sunchon.ac.kr

Korean Chemical Engineering Research, December 2019, 57(6), 758-762(5)
https://doi.org/10.9713/kcer.2019.57.6.758

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Abstract

이동용 고분자전해질 연료전지(PEMFC)의 수소발생용으로써 NaBH4는 많은 장점을 갖고 있다. 해상용으로 PEMFC가 사용될 때 해수를 이용해 NaBH4를 가수분해 하면 경제적이다. 그래서 본 연구에서는 NaBH4가수분해 과정에 증류수대신 해수를 이용해 수소를 발생시켰다. 활성탄 담지 Co-B/C 촉매를 사용해 NaBH4 가수분해 특성에 대해 연구하였다. 해수 사용시 NaBH4농도와 NaOH농도가 증가하면서 수소수율이 감소하였다. 높은 NaBH4와 NaOH농도에서 촉매 표면에 부산물이 부착되어 증류수에 비해 수소수율이 감소했다. NaBH4가수분해 활성화에너지는 증류수와 해수 각각 59.3, 74.4kJ/mol로 해수에서 수소발생속도를 증류수와 같이 높이려면 반응온도를 80 °C이상 상승시켜야 함을 보였다.

Sodium borohydride,NaBH4, has many advantages as hydrogen source for portable proton exchange membrane fuel cells (PEMFC). When PEMFC is used for marine use, NaBH4 hydrolysis using seawater is economical. Therefore, in this study, hydrogen was generated by using seawater instead of distilled water in the process of hydrolysis of NaBH4. Properties of NaBH4 hydrolysis reaction using activated carbon supported Co-B/C catalyst were studied. The yield of hydrogen decreased as NaBH4 concentration and NaOH concentration were increased during NaBH4 hydrolysis using sea water. At higher concentrations of NaBH4 and NaOH, byproducts adhered to the surface of the catalyst after hydrolysis reaction using sea water, reduced hydrogen yield compared to distilled water. The activation energy of NaBH4 hydrolysis is 59.3, 74.4 kJ/mol for distilled water and sea water, respectively. In order to increase the hydrogen generation rate in seawater as high as distilled water, the reaction temperature has to be increased by 80 °C or more.

Keywords

Sodium borohydride Hydrolysis Sea water Co-B/C catalyst Hydrogen yield Fuel cell

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