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

Bürger, Inga; Luetto, Carlo; Linder, Marc

doi:10.1016/j.ijhydene.2014.02.069

Cited by 15 publications

(20 citation statements)

References 19 publications

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“…An important enhancement is produced when this composite is doped with ZrFe 2 and ZrCoH 3 , as clearly emerged by the bars in Figure 10. The system containing ZrCoH 3 has been extensively investigated and, up to day, among the metal amide-based family, it is probably the only system tested under near practical conditions [137].…”

Section: Discussionmentioning

confidence: 99%

“…2LiNH 2 + 1.1MgH 2 + 0.1LiBH 4 -3 wt. %ZrCoH 3 has been considered as one of the most promising materials for possible real scale applications owing to its excellent hydrogen storage properties [136][137][138]. A prototype tank to feed a 1 kW HT-PEM stack for an Auxiliary Power Unit (APU), was built using this ternary system as storage material.…”

Section: Li-mg-n-h-borohydride Systemsmentioning

confidence: 99%

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Recent Progress and New Perspectives on Metal Amide and Imide Systems for Solid-State Hydrogen Storage

et al. 2018

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Hydrogen storage in the solid state represents one of the most attractive and challenging ways to supply hydrogen to a proton exchange membrane (PEM) fuel cell. Although in the last 15 years a large variety of material systems have been identified as possible candidates for storing hydrogen, further efforts have to be made in the development of systems which meet the strict targets of the Fuel Cells and Hydrogen Joint Undertaking (FCH JU) and U.S. Department of Energy (DOE). Recent projections indicate that a system possessing: (i) an ideal enthalpy in the range of 20-50 kJ/mol H 2 , to use the heat produced by PEM fuel cell for providing the energy necessary for desorption; (ii) a gravimetric hydrogen density of 5 wt. % H 2 and (iii) fast sorption kinetics below 110 • C is strongly recommended. Among the known hydrogen storage materials, amide and imide-based mixtures represent the most promising class of compounds for on-board applications; however, some barriers still have to be overcome before considering this class of material mature for real applications. In this review, the most relevant progresses made in the recent years as well as the kinetic and thermodynamic properties, experimentally measured for the most promising systems, are reported and properly discussed.

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Section: Discussionmentioning

confidence: 99%

Section: Li-mg-n-h-borohydride Systemsmentioning

confidence: 99%

Recent Progress and New Perspectives on Metal Amide and Imide Systems for Solid-State Hydrogen Storage

et al. 2018

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“…For the steel wall, only an energy balance of the solid is considered. The values for the respective properties as well as all assumptions can be taken from the previous publication, where this model has been validated [11]. The rate equations can be written as…”

Section: Model Equationsmentioning

confidence: 99%

“…More details can be found in Refs. [10,11,16]. Desorption of the CxH material (LieMgeNeH), 1 st step, 0 < X I < 0.67:…”

Section: Model Equationsmentioning

confidence: 99%

“…However, these materials usually show low reaction rates at temperatures below 100 C due to kinetic limitations of their conversion reaction with hydrogen [8,9]. One possibility to use the high storage capacities of these materials and to overcome their limitation in reaction dynamics is a combination reactor concept that has been presented by the authors before [10,11]. The idea of this concept is the combination of a fast reacting metal hydride material with a slowly reacting complex hydride material that shows a very high storage capacity.…”

Section: Introductionmentioning

confidence: 99%

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Considerations on the H2 desorption process for a combination reactor based on metal and complex hydrides

Bürger

Bhouri

Linder

2015

International Journal of Hydrogen Energy

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a b s t r a c tHydrogen 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 LaNi 4.3 Al 0.4 Mn 0.7 and 2 LiNH 2 e1.1 MgH 2 e0.1LiBH 4 e3 wt.% ZrCoH 3, 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 e 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.

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How to Design Hydrogen Storage Materials? Fundamentals, Synthesis, and Storage Tanks

Lai

Sun

Wang

et al. 2019

Advanced Sustainable Systems

122

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

Cited by 15 publications

References 19 publications

Recent Progress and New Perspectives on Metal Amide and Imide Systems for Solid-State Hydrogen Storage

Recent Progress and New Perspectives on Metal Amide and Imide Systems for Solid-State Hydrogen Storage

Considerations on the H2 desorption process for a combination reactor based on metal and complex hydrides

How to Design Hydrogen Storage Materials? Fundamentals, Synthesis, and Storage Tanks

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