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@INPROCEEDINGS{Tanaka:1038865,
author = {Tanaka, H. and Reinecke, Ernst-Arndt and Chaumeix, N. and
Bentaib, A. and Taniguchi, M. and Matsumura, D. and Jinjo,
I. and Nakayama, T. and Uegaki, S. and Aotani, T. and Kita,
T.},
title = {{E}xperimental verification to developing safety technology
for liquefied hydrogen: {P}roject "{STACY}"},
reportid = {FZJ-2025-01681},
year = {2024},
abstract = {Global efforts are underway to decarbonize the energy
sector. Liquefied (cryogenic) hydrogen (LH2) has highstorage
density, making it excellent for large-scale storage and
transportation, and is expected to play a fundamentalrole in
the hydrogen economy. However, liquid hydrogen has several
properties that are potential safety risks.An international
collaboration between Germany, France, and Japan is underway
in the project "Towards the SafeStorage and Transport of
Cryogenic Hydrogen" (acronym "STACY"). Project activities
are allocated to five workpackages to achieve specific
goals. This paper reports on the development of hydrogen
safety technology using acatalyst (WP3).This technology is
called "Passive Autocatalytic Recombiner: PAR" because it
works autonomously withoutexternal heating, blowing, or
stirring. Liquid hydrogen has the characteristics of
extremely low temperature andhigh energy density, and in the
event of a leak, it will expand highly. To achieve the PAR
required for these safetymeasures, the crystal structure of
the catalyst was designed from the atomic level, and an
actual catalyst wasprototyped, and repeated tests were
carried out in a large reaction vessel as well as laboratory
evaluations.As a countermeasure against the unlikely event
of a liquefied hydrogen leakage, progress is being made in
thedevelopment of catalysts that can oxidize hydrogen even
in extremely low temperatures, high expansion, and
low-oxygen environments, are resistant to catalyst poisons,
and can prevent spontaneous ignition due to heat
generation.The catalyst technology uses not only general
alumina supports, but also ceria and perovskite-type oxides
to controlthe surface state of precious metals, suppressing
hydrogen ignition through multi-stage configuration and
showingresistance to contamination from oxygen and carbon
monoxide. Furthermore, the mechanism of catalyst
poisonresistance was elucidated using synchrotron radiation},
month = {Jun},
date = {2024-06-23},
organization = {WHEC2024, Cancun (Mexico), 23 Jun 2024
- 27 Jun 2024},
cin = {IET-4},
cid = {I:(DE-Juel1)IET-4-20191129},
pnm = {1422 - Beyond Design Basis Accidents and Emergency
Management (POF4-142)},
pid = {G:(DE-HGF)POF4-1422},
typ = {PUB:(DE-HGF)1},
url = {https://juser.fz-juelich.de/record/1038865},
}