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Advanced reactor concept for complex hydrides: Hydrogen absorption from room temperature

Bürger, Inga and Komogowski, Lars and Linder, Marc (2014) Advanced reactor concept for complex hydrides: Hydrogen absorption from room temperature. International Journal of Hydrogen Energy, 39 (13), pp. 7030-7041. Elsevier. doi: 10.1016/j.ijhydene.2014.02.070. ISSN 0360-3199.

Full text not available from this repository.

Official URL: http://dx.doi.org/10.1016/j.ijhydene.2014.02.070


Complex hydride materials (CxH) are potential candidates for hydrogen storage in automotive applications due to their high hydrogen storage capacities. However, the reaction rates of these materials are rather low at temperatures below 100 °C implying negative effects on absorption performance e.g. at a fuelling station. In this paper simulated and experimental results of a new reactor concept that can improve the dynamic reactor performance are presented. This concept is based on the combination of a metal hydride (MeH) and a CxH in one reactor, separated by a gas permeable layer. The storage capacity of available MeH materials is justw1 wt.%, however, they show very high reaction rates even at room temperature. Thus, the idea of this concept is to combine both: the high storage capacity of the CxH material and the high reaction rate of the MeH material. The two reference materials for this study are 2LiNH2-1.1MgH2-0.1LiBH4-3 wt.%ZrCoH3 (Li-Mg-N-H) and LaNi4.3Al0.4Mn0.3 (MeH). In the first part, 2D simulation results are presented showing the development of a reaction front from the core to the annulus of the tubular reactor caused by the fast exothermal absorption reaction of the MeH material. In the second part, experimental results of a 50 g lab-scale reactor and simulated scenarios are presented and used for model validation. In the present scenario it has been possible to reduce the time to initiate the absorption reaction from room temperature by approximately 500 s.

Item URL in elib:https://elib.dlr.de/88734/
Document Type:Article
Title:Advanced reactor concept for complex hydrides: Hydrogen absorption from room temperature
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Bürger, Ingainga.buerger (at) dlr.deUNSPECIFIED
Linder, Marcmarc.linder (at) dlr.deUNSPECIFIED
Date:17 March 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.ijhydene.2014.02.070
Page Range:pp. 7030-7041
Series Name:Elsevier
Keywords:Reactor concept LaNi5 Li Mg N-H Hydrogen storage Modelling Combination of materials Absorption
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 13:04
Last Modified:10 Jan 2019 15:47

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