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@ARTICLE{Deibert:910144,
author = {Deibert, W. and Ivanova, M. E. and Ran, K. and Mayer, J.
and Meulenberg, W. A.},
title = {{U}p-scaling and processing related characterisation of
hydrogen permeation membranes based on pristine and {M}o
substituted {L}a28−x{W}4+x{O}54+1.5x},
journal = {Journal of the European Ceramic Society},
volume = {43},
number = {1},
issn = {0955-2219},
address = {Amsterdam [u.a.]},
publisher = {Elsevier Science},
reportid = {FZJ-2022-03633},
pages = {121-129},
year = {2023},
abstract = {Mixed protonic and electronic conducting ceramic membranes
offer a high potential to separate pure hydrogen from gas
mixtures or in the field of membrane reactors. The
water-gas-shift reaction is an example for the possible
application of lanthanum tungstate based materials with
general formula La28−xW4+xO54+1.5x (LaWO) due to their
high stability under the reaction conditions. To bring
ceramic membranes one step closer to commercialisation, high
effort is needed to find optimised material compositions and
transfer them into suitable fabrication techniques. Both is
done in the present work. First, a detailed XRD-study,
supported by microstructural analysis, was performed to find
a suitable composition for Mo-substituted LaWO. As it was
demonstrated, with increasing the Mo concentration as a
substitute for W leading to enhanced electronic
conductivity, the single phase region narrows and La/W ratio
shifts to the higher values. In order to ensure single phase
composition of the powder used in the membrane fabrication,
20 $mol.\%$ Mo substituted LWO was the material of choice.
Subsequently tape-casting was performed to produce
asymmetric membranes consisting of a thin functional
membrane made of LaWO-Mo20 and a porous support layer of
pure LaWO. Such asymmetric component could be scaled-up to
100 cm² active membrane area. The sintering behaviour was
characterised by optical dilatometry. The more
cost-efficient support material MgO was shown to be
incompatible with the LaWO-Mo20 material. Therefore, an
advanced fabrication route was developed by introducing an
intermediate layer to overcome interdiffusion and secondary
phase formation.},
cin = {IEK-1 / ER-C-2},
ddc = {660},
cid = {I:(DE-Juel1)IEK-1-20101013 / I:(DE-Juel1)ER-C-2-20170209},
pnm = {1232 - Power-based Fuels and Chemicals (POF4-123)},
pid = {G:(DE-HGF)POF4-1232},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000877589400004},
doi = {10.1016/j.jeurceramsoc.2022.09.033},
url = {https://juser.fz-juelich.de/record/910144},
}