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논문 기본 정보

자료유형
학술대회자료
저자정보
정기문 (국민대학교) 최석현 (키밸브키술) 정문선 (한국에너지기술연구원) 이희준 (국민대)
저널정보
대한기계학회 대한기계학회 춘추학술대회 대한기계학회 창립 70주년 기념 학술대회
발행연도
2015.11
수록면
3,279 - 3,284 (6page)

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Many types of hydrogen storages have been studied recently paying attention to hydrogen storage and release. Among those, dehydrogenation from the hydrolysis of a sodium borohydride (NaBH₄) solution has been of much interest owing to its high theoretical hydrogen storage capacity (10.8 wt.%) and potentially safe operation. However, most of researchers have focused on chemical characteristics such as NaBH4 hydrolysis, catalysts, and synthesis, but not on the mechanical design of a chemical reactor for hydrogen generation. To design an efficient chemical reactor, size (which should be compact) and pressure drop, reaction rate are of great importance. Therefore, a microchannel is promising for the design of a dehydrogenation reactor owing to its very large reacting surface area per unit volume. Moreover, micro size pin fin structures could be manufactured on the bottom of microchannel surface for even more extended reacting surface area and contact catalytic reaction. An experiment study has been performed on catalytic reaction rate and pressure drop of NaBH4 solution over both a single microchannel with a hydraulic diameter of 300 ㎛ and a staggered array of micro pin fins with hydraulic diameter of 50 ㎛ in the microchannel. Catalytic reaction rates and pressure drops were obtained over Reynolds numbers from 1 to 60 and solution concentration from 5 to 20 wt.%. Moreover, reacting flows were visualized using a high-speed camera with a macro zoom lens. As a result, both the amount of hydrogenation and pressure drop are 2.45 times and 1.5 times more in pin fin microchannel than in a single microchannel, respectively.

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Abstract
1. 서론
2. 실험
3. 가시화
4. 결과
5. 결론
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UCI(KEPA) : I410-ECN-0101-2016-550-002168169