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Received September 3, 2016
Accepted September 27, 2016
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비담지 촉매를 이용한 NaBH4 가수분해반응에서 부산물의 특성
Characteristics of Byproduct After NaBH4 Hydrolysis Reaction Using Unsupported Catalyst
순천대학교 화학공학과, 57922 전라남도 순천시 중앙로 255 1(주)CNL Energy, 57922 전라남도 순천시 중앙로 255
Department of Chemical Engineering, Sunchon National University, 255, Jungang-Ro, Suncheon, Jeonnam, 57922, Korea 1CNL Energy Co, 255, Jungang-Ro, Suncheon, Jeonnam, 57922, Korea
parkkp@sunchon.ac.kr
Korean Chemical Engineering Research, February 2017, 55(1), 13-18(6), 10.9713/kcer.2017.55.1.13 Epub 1 February 2017
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Abstract
무인항공기용 고분자전해질 연료전지의 수소발생용으로써 NaBH4는 많은 장점을 갖고 있다. 무인항공기용으로 이용하기 위해서는 NaBH4 가수분해 반응 후 부산물의 무게와 부피가 작아야 한다. 그래서 본 연구에서는 비담지 촉매를 사용한 NaBH4 가수분해 반응 후 부산물의 무게와 부피에 대해 연구하였다. 촉매 형태, NaBH4 농도, NaOH 농도, 촉매팩 두께 등이 부산물의 무게와 부피에 미치는 영향에 대해 연구하였다. 본 실험 조건에서 발생한 부산물은 대부분 NaB(OH)4였고, 거품이 발생하여 부피가 증가하였다. 안정화제인 NaOH 농도는 부산물의 무게와 부피에 별 영향을 주지 않았다. NaBH4 농도가 증가하면 부산물 무게가 감소하였으나, NaBH4 농도 23 wt%에서 최고 부피를 나타냈다. 소포제를 이용해 부산물의 부피를 감소시킬 수 있었다.
Sodium borohydride, NaBH4, shows a number of advantages as hydrogen source for UAV PEMFC (Unmaned Aerial Vehicle Proton Exchange Membrane Fuel Cells). In order to use for UAV, the weight and volume of byproduct should be small after NaBH4 hydrolysis reaction. Therefore, the weight and volume of byproduct were studied after NaBH4 hydrolysis reaction using unsupported catalyst. The effect of catalyst type, concentration of NaBH4, concentration of NaOH and thickness of catalyst pack on the weight and volume of byproduct were studied. Most of byproduct was NaB(OH)4 and superficial volume of byproduct increased due to foam evolved from byproduct. The weight and volume of byproduct were not affected by concentration of NaOH used stabilizer. The weight of byproduct decreased as concentration of NaBH4 solution increased, but maximum volume of byproduct obtained at 23 wt% of NaBH4. Suitable defoaming agent reduced the volume of byproduct.
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