NaBH4 based storage has been intensively studied to evaluate its potential for portable, automobile and stationary applications. It combines the advantages of a high potential hydrogen density together with a safe and easy hydrogen release through a hydrolysis reaction. Around 10 wt% H2 can be stored in a NaBH4 based system at ambient temperature and atmospheric pressure. The hydrogen is released when water is added to an excess of NaBH4(s)/cobalt (s)/NaOH(s) powder mixture. The heat evolved during the reaction increases the temperature from 25 up to 140 °C as monitored by an IR camera. This permits the formation of NaBO2.H2O with x approx 1/2, thermodynamically stable above 105 °C, rather than NaBO2.4H2O typically formed in excess water at room temperature. The presence of NaOH plays a crucial role in accelerating the reaction and increasing the temperature.


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    Titel :

    Maximizing the hydrogen yield in the catalyzed hydrolysis of pure borohydride powders


    Beteiligte:
    Bennici, Simona (Autor:in) / Garron, Anthony (Autor:in) / Auroux, Aline (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    2010


    Format / Umfang :

    5 Seiten, 4 Bilder, 27 Quellen




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch