抄録
Chemical solution techniques including sol-gel and polymer pyrolysis methods are well used for the synthesis of micro-porous membranes giving homogeneous thin layer on a porous support. In this study, silica and other oxide-based ceramic membranes were synthesized by dip-coating onto an anodic alumina support using several liquid precursors. As a typical result, the precursor-derived amorphous silica membrane exhibited hydrogen permselectivity explained by the molecular sieving mechanism, and H2/CO selectivity of 63 and H2 permeance of 1.1x10-7 mol/m2•sec•Pa were achieved at 773K. The effects of liquid precursors as well as chemical processing conditions on the hydrogen permselectivity will be discussed from a view point of micro-pore structure control for the hydrogen permselectivity of ceramic membranes. This work has been supported by NEDO as a part of the R&D Project for High Efficiency Hydrogen Production/Separation System using Ceramic Membrane promoted by METI, Japan.
