Journal Article

PUBDB-2026-00761

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Insights on mechanical and morphological metal hydride powder characteristics during hydrogen interaction and stress mitigation strategies for hydrogen storage vessels

Stahlkopf, G. (First author)Hereon* ; Passing, M.Hereon* ; Puszkiel, J. (Corresponding author)Hereon* ; Moosmann, J. ; Beckmann, F. ; Warfsmann, J.Hereon* ; Karimi, F.Hereon* ; Kulvait, V.Hereon* ; Klassen, T.Hereon* ; Jepsen, J.Hereon*

2026
Elsevier New York, NY [u.a.]

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Please use a persistent id in citations: doi:10.1016/j.ijhydene.2026.153776  doi:10.3204/PUBDB-2026-00761

Abstract: Interstitial metal hydride alloys exhibit significant volume changes between the hydrogenated and dehydrogenated states during cycling, resulting in macroscopic stresses in powder beds that must be considered in tank design. Interactions are complex, and these stresses are primarily influenced by the local particle size distribution (PSD) and packing density. This study examines radial expansion forces in vertical storage containers using AB 2 - type hydride alloys and synchrotron-radiation micro-computed tomography (SRμCT). Up to 50 cycles, progressive particle decrepitation occurs, with densification in the lower layers reaching a 91% packing density. This results in local pressures of up to 605 bar in the hydrogenated state. A new empirical equation links packing density to exponentially increasing stress. Experiments have shown that optimized PSDs can reduce stress by up to 45% and increase storage capacity by 87% within the same tank volume.

Note: Funding: Bundesministerium für Wirtschaft und Klimaschutz in the frame of the “HyReflexS “project (Funding code: 03El3020A and 03EI3020C); project Digi-HyPro, funded by dtec.bw – Digitalization and Technology Research Center of the Bundeswehr, which is financed by the European Union – NextGenerationEU.

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Contributing Institute(s):

1. Helmholtz-Zentrum Hereon (Hereon)
2. DOOR-User (DOOR ; HAS-User)

Research Program(s):

1. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)
2. FS-Proposal: I-20230862 (I-20230862) (I-20230862)

Experiment(s):

1. PETRA Beamline P07 (PETRA III)

Appears in the scientific report 2026

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Engineering, Computing and Technology ; Ebsco Academic Search ; Essential Science Indicators ; IF >= 5 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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