This study aims the development of a highly permeable
ceramic hollow fibre substrate composed of a thin outer
sponge-like layer, for Pd membrane deposition, and a plurality
of self-organized micro-channels, for the reduction of mass
transfer resistance.
More particularly, the multiple and thick
sponge-like layers commonly present in previous HF substrates
are reduced into one continuous and thin outer
sponge-like layer suitable to coat Pd membranes.
Meanwhile, the shorter micro-voids, usually contained between spongelike
layers, are converted into longer micro-channels, with
one end fully opened on the inner surface and negligible mass
transfer resistance.
In order to investigate the role of the outer
sponge-like layer in the formation of defect-free Pd membrane
and its hydrogen permeation, Pd membrane with different
thicknesses were deposited on ceramic hollow fibre substrates
sintered at two different temperatures of 1300 and
1400 C.
This study aims the development of a highly permeableceramic hollow fibre substrate composed of a thin outersponge-like layer, for Pd membrane deposition, and a pluralityof self-organized micro-channels, for the reduction of masstransfer resistance. More particularly, the multiple and thicksponge-like layers commonly present in previous HF substratesare reduced into one continuous and thin outersponge-like layer suitable to coat Pd membranes. Meanwhile, the shorter micro-voids, usually contained between spongelikelayers, are converted into longer micro-channels, withone end fully opened on the inner surface and negligible masstransfer resistance. In order to investigate the role of the outersponge-like layer in the formation of defect-free Pd membraneand its hydrogen permeation, Pd membrane with differentthicknesses were deposited on ceramic hollow fibre substratessintered at two different temperatures of 1300 and1400 C.
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