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Advanced reactor concept for complex hydrides: Hydrogen desorption at fuel cell relevant boundary conditions

Bürger, Inga and Luetto, Carlo and Linder, Marc (2014) Advanced reactor concept for complex hydrides: Hydrogen desorption at fuel cell relevant boundary conditions. International Journal of Hydrogen Energy, 39, pp. 7346-7355. Elsevier. doi: 10.1016/j.ijhydrne.2014.02.069. ISSN 0360-3199.

Full text not available from this repository.

Official URL: http://dx.doi.org/10.1016/j.ijhydene.2014.02.069


Hydrogen storage in complex hydrides can be a storage option in automotive applications due to the high theoretical hydrogen storage capacities. As hydrogen is bonded by a chemical reaction to the solid state storage material, it is just released when heat is provided. In an automotive application for complex hydrides, this heat source can possibly be provided by the waste heat of a high temperature PEM fuel cell. However, for the application of existing complex hydride materials the temperature level of the fuel cell at 180 �C is still quite low leading to low desorption rates. A new reactor concept based on the addition of a metal hydride (MeH) to a complex hydride (CxH) reactor, separated by a gas permeable separation layer, can improve the desorption performance. In this paper, the effects of this reactor concept on desorption performance are studied using the two reference materials 2LiNH2-1.1MgH2-0.1LiBH4-3 wt.%ZrCoH3 and LaNi4.3Al0.4Mn0.3. First, a model is developed and 2D simulations are performed using a driving scenario. Then, the model is validated by experimental data that has been obtained using a ~600 g lab scale reactor. Concluding, there exist two main advantages of the combination reactor concept: The desorption time at a pressure above the fuel cell supply pressure is extended by a factor of 1.2, and 94 instead of 84% of the max. mass of hydrogen stored in the material can be desorbed at technically relevant boundary conditions.

Item URL in elib:https://elib.dlr.de/88735/
Document Type:Article
Title:Advanced reactor concept for complex hydrides: Hydrogen desorption at fuel cell relevant boundary conditions
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Bürger, Ingainga.buerger (at) dlr.deUNSPECIFIED
Linder, Marcmarc.linder (at) dlr.deUNSPECIFIED
Date:3 April 2014
Journal or Publication Title:International Journal of Hydrogen Energy
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1016/j.ijhydrne.2014.02.069
Page Range:pp. 7346-7355
Keywords:Reactor concept LaNi5 Li-Mg-N-H Hydrogen storage Modelling Combination of materials Desorption
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Terrestrial Vehicles (old)
DLR - Research area:Transport
DLR - Program:V BF - Bodengebundene Fahrzeuge
DLR - Research theme (Project):V - Project Fahrzeugenergiesysteme III (old)
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Thermal Process Technology
Deposited By: Bürger, Inga
Deposited On:15 May 2014 13:06
Last Modified:15 May 2014 13:06

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