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High Molecular Permeance in a Poreless Ceramic Membrane
Author(s) -
Gu Y.,
Oyama S. T.
Publication year - 2007
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.200602637
Subject(s) - permeance , boehmite , materials science , membrane , chemical engineering , ceramic , solubility , layer (electronics) , substrate (aquarium) , composite material , permeation , organic chemistry , chemistry , engineering , aluminium , biochemistry , oceanography , geology
A novel composite membrane without continuous pores (see figure) with very high permeance for hydrogen is reported. The membrane is composed of a thin (30 nm) permselective silica layer deposited on a graded γ‐alumina multilayer substrate, consisting of size‐controlled boehmite (AlOOH) sols deposited in order of decreasing size on a macroporous alumina support. A theory involving jumps of permeating molecules between adjacent solubility sites explains its behavior.