化工进展

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一种硼氢化钠水解制氢的技术路线

方朝君1,2,闫常峰1,2,郭常青1   

  1. 1中国科学院广州能源研究所,广东 广州 510640;2中国科学院研究生院,北京 100039
  • 出版日期:2011-02-05 发布日期:2011-02-05

Technological route of hydrogen generation from sodium borohydride

FANG Zhaojun1,2,YAN Changfeng1,2,GUO Changqing1   

  1. 1 Guangzhou Institute of Energy Conversion,Chinese Academy of Sciences,Guangzhou 510640,Guangdong,China;2 Graduate School of Chinese Academy of Sciences,Beijing 100039,China
  • Online:2011-02-05 Published:2011-02-05

摘要:

硼氢化钠催化水解制氢是一项实用、环保、可行的制氢技术。直接应用固态的硼氢化钠或与催化剂的混合物制氢比使用其溶液制氢更便捷、安全。本文设计了小型制氢反应器,使用NaBH4和乙酸钴粉末的混合物作初始反应物。研究了初始反应温度、供水速率和NaBH4与乙酸钴的混合比对产氢特性的影响。实验结果表明,反应区外围使用冷却水时,可将反应温度波动控制在68 ,这有利于降低氢气流速的峰值和保持相对稳定的氢气流。当催化剂的混合量大于4%时,氢气的转化率可达95%以上。

Abstract:

Hydrogen production by hydrolysis of sodium borohydride by means of metal catalyst is a practicalenvironment-friendly and feasible approach. Especiallyusing the solid state sodium borohydride or its mixture directly is simpler and safer than using its solution. The present work was focused on the design of a small scale generator suitable for H2 generation from the mixture powders of sodium borohydride and cobalt acetate as catalyst precursor at a reasonable temperature and at high generation efficiency. The initial temperatureflow rate of watermixture ratio and product composition were investigated experimentally. It was found that the process temperature measured directly by a thermocouple fluctuated in a small range of 68 which could decrease the peak value of H2 generation rate and obtain a steady hydrogen flow. A high H2 generation efficiency > 95% was achieved under the mixture ratio with the catalyst being more than 4%. The catalyst cobalt acetate was formed in-situ and evenly distributed.

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