Journal
JOURNAL OF MEMBRANE SCIENCE
Volume 598, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.memsci.2019.117799
Keywords
Highly hydrophobic Si-C-H organic-inorganic hybrid; Mesoporous gamma-Al2O3 membrane; Polycarbosilane; Polymer-derived ceramics (PDCs); Solar hydrogen production system
Categories
Funding
- Research Project for Future Development: Artificial Photosynthetic Chemical Process (ARPChem) (METI/NEDO, Japan: 2012-2022)
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Excellent hydrophobicity of polycarbosilane (PCS)-derived Si-C-H organic-inorganic hybrid was characterized by measuring water vapor adsorption-desorption isotherms at room temperature. Modification with the PCS-derived Si-C-H successfully improved hydrostability in terms of stable gas permeation property of sol gel-derived hydrophilic mesoporous gamma-Al2O3 membrane formed on a macroporous alpha-Al2O3 support: even under saturated water vapor partial pressure at 50 degrees C, the modified membrane exhibited high gas permeances of helium, hydrogen and nitrogen ranging from 1.2 to 3.0 x 10(-6) mol m(-2) s(-1).Pa-1. The improved gas permeability under the humid condition achieved for the Si-C-H-modified mesoporous gamma-Al2O3 membrane in this study was discussed aiming to prepare a gas permeable hydrophobic mesoporous intermediate layer essential for developing H-2-permselective ceramic-based multilayered composite membranes with applications to novel solar hydrogen production system.
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