Application of Liquid Nitrogen Cold Trap for Purification of Hydrogen Gas Stream Generated from NaBH4
Application of Liquid Nitrogen Cold Trap for Purification of Hydrogen Gas Stream Generated from NaBH4
复制标题
液氮冷阱净化NaBH4制氢气流的应用
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
Zimmerman
中科院分区：
文献类型：
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作者：
Wameath;Abdul;Gulcan;Seradaroglu;William;Zimmerman
研究了用液氮冷阱（LNCT）脱除硼氢化钠催化酸分解产生的氢气中的水蒸气和碱雾的可行性。实际上，目标应用是移动的燃料电池的基础上，从储存在化学电池的氢生产。LNCT可作为一步纯化方法使用，具有更少的成本和空间需求，而不是应用常规纯化技术。在小型填充床反应器中考察了两种催化剂在NaBH_4水溶液制氢反应中的催化性能。NaBH 4催化分解产生的氢气伴随有少量的水蒸气和碱雾。尽管如此，当应用NaBH 4的酸分解时产生更高的量，并且因此利用LNCT用于H2纯化已被证明是有用的，并且导致这些杂质的含量的降低;从而出口流中的氢气浓度增加。
The feasibility of using liquid nitrogen cold trap (LNCT) for the removal of water vapour and alkaline mist from the hydrogen gas stream which is generated from the catalytic and acidic decomposition of sodium borohydride is investigated. Practically, the target application is mobile fuel cells based on hydrogen production from storage in chemical hydrides. The LNCT would be used as a one step purification method with less cost and space requirements instead of applying the conventional purification techniques. Two catalysts were investigated for the production of hydrogen from the aqueous solution of NaBH4 in a small scale packed bed reaction column. The hydrogen generated from the catalytic decomposition of NaBH4 was accompanied by limited quantity of water vapour and alkaline mist. Nonetheless, higher quantities were generated when applying the acidic decomposition of NaBH4 and consequently the utilization of LNCT for H2 purification has proved useful and lead to a reduction in the content of these impurities; thereby the concentration of hydrogen in the outlet stream has increased.