Bürger, Inga and Bhouri, Maha and Linder, Marc (2015) Considerations on the H2 desorption process for a combination reactor based on metal and complex hydrides. International Journal of Hydrogen Energy, 40 (22), pp. 7072-7082. Elsevier. DOI: 10.1016/j.ijhydene.2015.03.136 ISSN 0360-3199
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Official URL: http://www.sciencedirect.com/science/journal/03603199/40/22
Abstract
Hydrogen storage systems based on the combination reactor concept are promising for application of future complex hydride materials with high storage capacities and low reaction kinetics at moderate operating temperatures. In such reactors, a fast reacting metal hydride is added to a complex hydride material in a separate compartment of the tank combining the advantages of the high storage capacity of the complex hydride with the high reaction rate of the metal hydride. In the present publication, three issues regarding the desorption performance of such a reactor are discussed based on analytical considerations and 1D simulations. First, it is studied whether the optimal reactor design based on a tubular geometry that has been previously determined for the absorption reaction also enables satisfying desorption performances. It can be concluded from the corresponding simulations that based on the properties of the present reference materials LaNi4.3Al0.4Mn0.7 and 2 LiNH2–1.1 MgH2–0.1LiBH4–3 wt.% ZrCoH3, the hydrogen desorption performance of the materials in this reaction geometry is good. Second, it is shown that besides the geometry of the reactor, also its module size is important, as it can be crucial for the thermal management during the desorption. A methodology was developed that allows to analytically determine a first estimate for the best minimum module size configuration – only based on the desorption rate of the basic material. This approach is confirmed by time dependent 1D simulations applying a validated model for the reference materials. Third, the influence of a realistic periodic desorption load on the performance of a combination reactor is studied. The results clearly show that since the addition of a MeH material enables much smaller module sizes, it is advantageous for the thermal management of complex hydride based reactors and increases their flexibility.
Item URL in elib: | https://elib.dlr.de/96267/ | ||||||||||||
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Document Type: | Article | ||||||||||||
Title: | Considerations on the H2 desorption process for a combination reactor based on metal and complex hydrides | ||||||||||||
Authors: |
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Date: | 24 April 2015 | ||||||||||||
Journal or Publication Title: | International Journal of Hydrogen Energy | ||||||||||||
Refereed publication: | Yes | ||||||||||||
Open Access: | Yes | ||||||||||||
Gold Open Access: | No | ||||||||||||
In SCOPUS: | Yes | ||||||||||||
In ISI Web of Science: | Yes | ||||||||||||
Volume: | 40 | ||||||||||||
DOI : | 10.1016/j.ijhydene.2015.03.136 | ||||||||||||
Page Range: | pp. 7072-7082 | ||||||||||||
Publisher: | Elsevier | ||||||||||||
ISSN: | 0360-3199 | ||||||||||||
Status: | Published | ||||||||||||
Keywords: | Complex hydride; Metal hydride; Combination multi./tubular reactor; Modelling; 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 - Fahrzeugenergiesystem III (old) | ||||||||||||
Location: | Stuttgart | ||||||||||||
Institutes and Institutions: | Institute of Engineering Thermodynamics > Thermal Process Technology | ||||||||||||
Deposited By: | Bürger, Inga | ||||||||||||
Deposited On: | 11 Jun 2015 10:23 | ||||||||||||
Last Modified: | 31 Jul 2019 19:53 |
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