Open AccessCERAMIC MEMBRANES FOR HYDROGEN PRODUCTION FROM COAL
Author(s) -
George R. Gavalas
Publication year - 2004
Publication title -
osti oai (u.s. department of energy office of scientific and technical information)
Language(s) - English
Resource type - Reports
DOI - 10.2172/822136
Subject(s) - materials science , permeation , leaching (pedology) , polymer , membrane , chemical engineering , solvent , composite material , phase (matter) , chemistry , organic chemistry , biochemistry , environmental science , soil science , engineering , soil water
A technique was developed to extrude thin glass tubes from a glass-polyethersulfone-solvent (NMP) paste with a glass to polymer weight ratio of about 8. The extrudates were gelled in water and heat treated at 800-950 C to remove the polymer and sinter the particles to a dense glass structure. Subsequently, the tubes were leached in hot water to remove the soluble phase formed by phase separation during cooling. The tubes were characterized by XRD, SEM, and permeation measurements. SEM examination indicated that during leaching the glass developed pores of about 100 nm size. Permeation measurements showed lack of separation selectivity consistent with the pore size observed in SEM
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