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首页> 外文期刊>Energy >Hydrogen generation by aluminum corrosion in aqueous alkaline solutions of inorganic promoters: The AlHidrox process
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Hydrogen generation by aluminum corrosion in aqueous alkaline solutions of inorganic promoters: The AlHidrox process

机译：在无机促进剂的碱性水溶液中通过铝腐蚀产生氢：AlHidrox工艺

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摘要

The research of alternative processes to obtain clean fuels has become a main issue because of the concerns related to the current energy system, both from economical and environmental points of view. Hydrogen storage and production methods are being investigated for stationary and portable applications. Up to now, a significant part of H_2 production on demand was thought to be fulfilled by using chemical hydrides, but recent studies have proved the limitations of this approach. Conversely, H_2 production based in the corrosion of light metals in water solutions is an interesting alternative. Among all of them, Al is probably the most adequate metal for energetic purposes due to its high electron density and oxidation potential. But concerning H_2 production from Al corrosion in water, a major issue remains unsolved: metal passivation due to the formation of AI(OH)_3 inhibits H_2 evolution. In this work we show the last results obtained for the generation of H_2 from water using Al powder using diverse alkaline solutions. It is confirmed that corrosion is not affected solely by the solution pH but also by the nature of the ionic species found in the aqueous medium. Moreover, we describe the AlHidrox process, which minimizes Al passivation under mild conditions by the addition of different inorganic salts as corrosion promoters, allowing 100% yields and flow rates up to 2.9 L/min per gram of Al. The feasibility of the process has been regarded in terms of stability (by conducting several successive runs) and self-initiation without an external heating.
机译：从经济和环境的角度出发，由于对当前能源系统的关注，研究获得清洁燃料的替代方法已成为一个主要问题。正在研究用于固定式和便携式应用的氢存储和生产方法。到目前为止，人们认为通过使用化学氢化物可以满足大部分H_2按需生产，但是最近的研究证明了这种方法的局限性。相反，基于水溶液中轻金属腐蚀的H_2生产是一种有趣的选择。在所有这些金属中，Al可能由于其高电子密度和氧化电位而成为用于高能用途的最合适的金属。但是关于从水中的铝腐蚀产生H_2的问题，仍然没有解决：由于AI（OH）_3的形成而引起的金属钝化会抑制H_2的析出。在这项工作中，我们显示了使用不同的碱性溶液，使用Al粉从水中生成H_2所获得的最后结果。可以确定腐蚀不仅受溶液pH值的影响，而且还受水性介质中离子种类的影响。此外，我们描述了AlHidrox工艺，该工艺通过添加不同的无机盐作为腐蚀促进剂，在温和条件下将Al钝化降至最低，从而使100％的产率和最高每克Al 2.9 L / min的流速。已经从稳定性（通过进行多次连续运行）和无需外部加热的自引发的角度考虑了该方法的可行性。

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  • 来源
    《Energy》 |2011年第5期|p.2493-2501|共9页
  • 作者

    Jorge Macanas; Lluis Soler; Angelica Maria Candela; Maria Munoz; Juan Casado;

  • 作者单位

    Chemical Engineering Department, Universitat Politecnica de Catalunya, C/Colom 1, 08222 Terrassa, Barcelona, Catalonia, Spain;

    Centre Crup de Tecniques de Separacio en Quimica (GTS), Unitat de Quimica Analitica, Departament de Quimica, Universitat Autdnoma de Barcelona,Edifici C - Campus de la UAB s, 08193 Bellaterra, Barcelona, Catalonia, Spain;

    Centre Crup de Tecniques de Separacio en Quimica (GTS), Unitat de Quimica Analitica, Departament de Quimica, Universitat Autdnoma de Barcelona,Edifici C - Campus de la UAB s, 08193 Bellaterra, Barcelona, Catalonia, Spain;

    Centre Crup de Tecniques de Separacio en Quimica (GTS), Unitat de Quimica Analitica, Departament de Quimica, Universitat Autdnoma de Barcelona,Edifici C - Campus de la UAB s, 08193 Bellaterra, Barcelona, Catalonia, Spain;

    Centre Crup de Tecniques de Separacio en Quimica (GTS), Unitat de Quimica Analitica, Departament de Quimica, Universitat Autdnoma de Barcelona,Edifici C - Campus de la UAB s, 08193 Bellaterra, Barcelona, Catalonia, Spain;

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  • 正文语种 eng
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  • 关键词

    hydrogen generation aluminum corrosion oxometallate solutions inorganic salts alhidrox process;

    机译：氢生成铝腐蚀金属氧酸盐溶液无机盐Alhidrox工艺;

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