Experimental study of powder bed behavior of sodium alanate in a lab-scale H2 storage tank with flow-through mode

Utz, Inga; Linder, Marc; Schmidt, Niko; Hu, Jianjiang; Fichtner, Maximilian; Wörner, Antje

doi:10.1016/j.ijhydene.2012.02.016

Cited by 15 publications

(9 citation statements)

References 22 publications

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“…A heating treatment to 300°C was necessary. Unlike Ti-doped NaAlH 4 which has a decreasing kinetics and capacity with cycling, 9,10 Ce-doped materials exhibit very good reversibility, cycling stability and even slightly improving kinetics, both in the lab scale tests and in tank tests, [15][16][17] which is desirable as a storage medium. It is also an indication that Ce-based catalysts work a different catalytic mechanism than Ti-catalysts.…”

Section: Resultsmentioning

confidence: 99%

Effects of Ce-Based Dopants on the Hydrogen Storage Material of NaAlH₄

Witter

Ren

et al. 2012

MRS Proc.

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Cerium in various chemical forms was introduced into NaAlH 4 to study the hydrogen sorption properties of the resulted material. Although all the Ce precursors tested in this work resulted in a reversible hydrogen storage material, an immediate enhancement in the desorption kinetics could be achieved by a heating treatment, resulting in the in situ formation of cerium aluminide (CeAl 4 ) in the material. While the use of CeAl 4 instead of CeCl 3 can increase the hydrogen capacity by bypassing the formation of the ineffective NaCl, the highest capacity of 4.9 wt% was obtained from NaAlH 4 doped directly with commercial metallic cerium, which may provide a much simplified process for a possible up-scaling preparation of this hydrogen storage material.

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Section: Resultsmentioning

confidence: 99%

Effects of Ce-Based Dopants on the Hydrogen Storage Material of NaAlH₄

Witter

Ren

et al. 2012

MRS Proc.

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“…Some researches and developers have been concentrating their efforts on finding a suitable material and designing a system for onboard vehicular applications [ 27 , 35 ]. Others have focused on increasing the efficiency of the combined heat-power units for the stationary hydrogen storing systems [ 36 , 37 , 38 ], or on improving different properties and kinetics of the complete system [ 35 , 39 , 40 ]. Here, a brief overview is presented on hydrogen storage systems that have been published, based on sodium alanate, metal amides, ammonia borane and alane.…”

Section: Thermolysismentioning

confidence: 99%

Development of Hydrogen Storage Tank Systems Based on Complex Metal Hydrides

et al. 2015

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This review describes recent research in the development of tank systems based on complex metal hydrides for thermolysis and hydrolysis. Commercial applications using complex metal hydrides are limited, especially for thermolysis-based systems where so far only demonstration projects have been performed. Hydrolysis-based systems find their way in space, naval, military and defense applications due to their compatibility with proton exchange membrane (PEM) fuel cells. Tank design, modeling, and development for thermolysis and hydrolysis systems as well as commercial applications of hydrolysis systems are described in more detail in this review. For thermolysis, mostly sodium aluminum hydride containing tanks were developed, and only a few examples with nitrides, ammonia borane and alane. For hydrolysis, sodium borohydride was the preferred material whereas ammonia borane found less popularity. Recycling of the sodium borohydride spent fuel remains an important part for their commercial viability.

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“…[13] This material exhibits the best hydrogen-sorption performance among all complex hydrides known to date and is remarkably superiort oc onventionalm etal hydrides.R oom also appears to exist to improve the overall hydrogen-storage properties of NaAlH 4 further, which suggests that its performance can be broughtm uch closer to the targetsf or practical applications through the design and optimization of higher performing catalysts.M ore importantly,N aAlH 4 is readily commercially availablea talow cost, and even some prototype hydrogen-storage tanks based on NaAlH 4 have been designed and tested. [14] Furthermore,t he recentd evelopmento fh igh-temperature proton-exchange membrane fuel cells (HT-PEMFCs) that operate at temperatures as high as 200 8Ci ncreases the feasibility of using NaAlH 4 as a hydrogen-storage medium. [15] Consequently,a saprototypical high-density complex hydride, NaAlH 4 is still ap romising on-boardh ydrogen-storage system worthy of further research.I nt his review,w ep resent ac omprehensive survey of the recentp rogress in the developmento fc atalyst-enhanced NaAlH 4 as ah ydrogen-storage material and focus on the effects of variousc atalysts and the related working mechanisms.…”

Section: Introductionmentioning

confidence: 99%

Development of Catalyst‐Enhanced Sodium Alanate as an Advanced Hydrogen‐Storage Material for Mobile Applications

et al. 2017

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As a prototypical high‐capacity complex hydride, sodium alanate (NaAlH4) has attracted significant attention because of its favorable thermodynamics and the potential low cost of its raw materials (NaH and Al). However, a high desorption temperature and slow kinetics preclude its practical use, particularly in mobile applications. The introduction of appropriate catalysts has been demonstrated to reduce the operating temperature and to improve the reversibility of hydrogen storage in NaAlH4 effectively. In this Review, we survey the development of various catalytic additives and their effects on the hydrogen‐storage behavior of NaAlH4. First, the basic physical and chemical characteristics of NaAlH4 and its catalyst‐doping methods are briefly summarized. Then, the catalytically enhanced hydrogen‐storage properties and the corresponding mechanistic understanding are highlighted. Finally, the remaining challenges and the directions of future research efforts are discussed.

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Experimental study of powder bed behavior of sodium alanate in a lab-scale H2 storage tank with flow-through mode

Cited by 15 publications

References 22 publications

Effects of Ce-Based Dopants on the Hydrogen Storage Material of NaAlH₄

Effects of Ce-Based Dopants on the Hydrogen Storage Material of NaAlH₄

Development of Hydrogen Storage Tank Systems Based on Complex Metal Hydrides

Development of Catalyst‐Enhanced Sodium Alanate as an Advanced Hydrogen‐Storage Material for Mobile Applications

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Experimental study of powder bed behavior of sodium alanate in a lab-scale H2 storage tank with flow-through mode

Cited by 15 publications

References 22 publications

Effects of Ce-Based Dopants on the Hydrogen Storage Material of NaAlH4

Effects of Ce-Based Dopants on the Hydrogen Storage Material of NaAlH4

Development of Hydrogen Storage Tank Systems Based on Complex Metal Hydrides

Development of Catalyst‐Enhanced Sodium Alanate as an Advanced Hydrogen‐Storage Material for Mobile Applications

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Product

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Effects of Ce-Based Dopants on the Hydrogen Storage Material of NaAlH₄

Effects of Ce-Based Dopants on the Hydrogen Storage Material of NaAlH₄