Experimental Results of an air-cooled lab-scale H2 storage tank based on sodium alanate
Utz, Inga and Schmidt, Niko and Wörner, Antje and Ju, Jinajiang and Zabara, Oleg and Fichtner, Maximilian (2011) Experimental Results of an air-cooled lab-scale H2 storage tank based on sodium alanate. International Journal of Hydrogen Energy, 36, pp. 3556-3565. Elsevier. DOI: 10.1016/j.ijhydene.2010.12.057. ISSN 0360-3199.
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One possibility to store hydrogen in fuel-cell driven automobiles is the storage in solid state hydrides. Sodium alanate (NaAlH4) is a well-known hydride desorbing up to 5 wt.% H2 with reasonable rates at temperatures above 120°C. Therefore a high temperature PEM fuel cell (HT-PEM FC) system with exhaust temperatures of about 180°C can be used to provide the required enthalpy of reaction. In this study, the absorption and desorption behaviour of a lab-scale tank containing 304 g cerium-doped NaAlH4 is studied using (exhaust) air as cooling medium. For absorption reactions an optimal temperature for maximal reaction rates is identified. Additionally, the importance of an adapted heat management is shown for the present tank. For desorption experiments different operation procedures are used and the constraints in temperature and air-flow given by the HT-PEM are considered. For all 25 experiments a good cycling stability has been measured with a stabilized material capacity of more than 3.7 wt.% H2.
|Title:||Experimental Results of an air-cooled lab-scale H2 storage tank based on sodium alanate|
|Journal or Publication Title:||International Journal of Hydrogen Energy|
|In Open Access:||No|
|In ISI Web of Science:||Yes|
|Page Range:||pp. 3556-3565|
|Keywords:||Hydrogen Storage, sodium alanate, scale-up, experimental results, cyclability, HT-PEM, cerium catalyst|
|HGF - Research field:||Aeronautics, Space and Transport|
|HGF - Program:||Transport|
|HGF - Program Themes:||V BF - Bodengebundene Fahrzeuge|
|DLR - Research area:||Transport|
|DLR - Program:||V BF - Bodengebundene Fahrzeuge|
|DLR - Research theme (Project):||V - Fahrzeugenergiesysteme|
|Institutes and Institutions:||Institute of Technical Thermodynamics > Thermal Process Technology|
|Deposited By:||Inga Utz|
|Deposited On:||01 Mar 2011 15:35|
|Last Modified:||04 Apr 2013 16:26|
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