Hydrogen Generation Using a Borohydride-Based Semi-continuous Milli-scale Reactor: Effects of Physicochemical Parameters on Hydrogen Yield
Hydrogen Generation Using a Borohydride-Based Semi-continuous Milli-scale Reactor: Effects of Physicochemical Parameters on Hydrogen Yield
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使用基于硼氢化物的半连续毫米级反应器产生氢气：物理化学参数对氢气产率的影响
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发表时间：
2009
期刊：
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通讯作者：
V. Subramanian
中科院分区：
文献类型：
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作者：
U. Javed;V. Subramanian
众所周知，用于便携式应用的氢气可以通过在碱性介质中稳定的硼氢化钠在合适的催化剂上的水解来产生。本文介绍了在毫米级半连续反应器中固体硼氢化钠（NaBH 4）粉末水解制氢的研究。酸化（盐酸）水用作氢生成的加速剂。研究了液固界面接触面积、NaBH 4负载量、液体流速和温度对毫微级反应器中氢气产率的影响。结果表明，使用6 N HCl溶液，在1 μL/min的流速下，从2 mg（0.053 mM）的NaBH 4可以产生高达80%的理论氢气。NaBH 4的水解产生副产物，如NaBO 2和NaCl。酸化水增加了由副产物组成的界面反应区的孔隙率。这改善了向未反应的NaBH 4的液体输送，并导致在更长的持续时间内产生更多的氢。
It is well-known that hydrogen for portable applications can be generated by hydrolysis of sodium borohydride stabilized in an alkali medium over suitable catalysts. This paper describes hydrogen generation by hydrolysis of solid sodium borohydride (NaBH4) powder in a milli-scale semi-continuous reactor. Acidified (hydrochloric acid) water is used as an accelerator for hydrogen generation. The effects of liquid−solid interfacial contact area, NaBH4 loading, liquid flow rate, and temperature on the hydrogen yield in the milli-scale reactor have been studied. The results indicate that up to 80% of the theoretical hydrogen can be produced from 2 mg (0.053 mM) of NaBH4 using a 6 N HCl solution at a flow rate of 1 μL/min. The hydrolysis of NaBH4 produces byproducts, such as NaBO2 and NaCl. Acidified water increases the porosity of the interfacial reaction zone consisting of byproducts. This improves liquid delivery to unreacted NaBH4 and results in greater hydrogen generation over longer durations.