NaBH4 가수분해 반응기 소재로서 알루미늄 합금의 특성 연구 = Characteristics of Al Alloy as a Material for Hydrolysis Reactor of NaBH4

국문 초록 (Abstract)

NaBH4 가수 분해용 경량반응기의 재질로서 알루미늄 합금을 검토하였다. 알루미늄은 알칼리에 용해되는데, NaBH4반응 용액중에 안정화제로 NaOH가 포함되어 있다. 알루미늄의 부식 속도를 낮추기 위해서 NaOH 농도를 낮추면 저장중에 NaBH4가 손실된다. 그래서 최적의 NaOH 농도를 결정할 때 알루미늄 부식과 NaBH4 안정화를 모두 고려해야한다. NaBH4 안정화와 알루미늄 부식속도는 수소발생속도에 의해 측정하였다. NaBH4 안정화는 20~50 oC에서 알루미늄 부식속도는 60~90 oC 온도에서 실험하였다. 알루미늄 부식과 NaBH4 안정화를 모두 고려한 최적의 NaOH농도는 0.30 wt% 였다. 알루미늄 합금 6061를 사용해 반응기 온도 80~90 oC에서 NaOH 0.3 wt%로 200분간 반응을 진행하였다.

다국어 초록 (Multilingual Abstract)

Aluminum alloy was examined as a material of low weight reactor for hydrolysis of NaBH4. Aluminum is dissolved with alkali, but there is NaOH as a stabilizer in NaBH4 solution. To decrease corrosion rate of aluminum, decrease NaOH concentration and this result in loss of NaBH4 during storage of NaBH4 solution. Therefore stability of NaBH4 and corrosion of aluminum should be considered in determining the optimum NaOH concentration. NaBH4 stability and corrosion rate of aluminum were measured by hydrogen evolution rate. NaBH4 stability was tested at 20~50 oC and aluminum corrosion was measured at 60~90 oC. The optimum concentration of NaOH was 0.3 wt%, considering both NaBH4 stability and aluminun corrosion. NaBH4 hydrolysis reaction continued 200min in aluminum No 6061 alloy reactor with 0.3 wt% NaOH at 80~90 oC.

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