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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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Abstract

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.

Document Type:Article
Title:Experimental Results of an air-cooled lab-scale H2 storage tank based on sodium alanate
Authors:
AuthorsInstitution or Email of Authors
Utz, Ingainga.utz@dlr.de
Schmidt, Nikoniko.schmidt@dlr.de
Wörner, Antjeantje.woerner@dlr.de
Ju, Jinajiangjianjiang.hu@kit.edu
Zabara, OlegUNSPECIFIED
Fichtner, Maximilianmaximilian.fichtner@int.fzk.de
Date:2011
Journal or Publication Title:International Journal of Hydrogen Energy
Refereed publication:Yes
In Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:36
DOI:10.1016/j.ijhydene.2010.12.057
Page Range:pp. 3556-3565
Publisher:Elsevier
ISSN:0360-3199
Status:Published
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:Terrestrial Vehicles
DLR - Research area:Transport
DLR - Program:V BF - Bodengebundene Fahrzeuge
DLR - Research theme (Project):V - Fahrzeugenergiesysteme (old)
Location: Stuttgart
Institutes and Institutions:Institute of Technical Thermodynamics > Thermal Process Technology
Deposited By: Inga Bürger
Deposited On:01 Mar 2011 15:35
Last Modified:04 Apr 2013 16:26

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