CERAMIC MEMBRANES FOR HYDROGEN PRODUCTION FROM COAL

Gavalas, George R.

California Institute of Technology (United States)

关键词: 08 Hydrogen;    Hydrogen Production;    Membranes;    X-Ray Diffraction;    Polymers;   

DOI  :  10.2172/822136
RP-ID  :  NONE
RP-ID  :  FG26-00NT40817
RP-ID  :  822136

美国|英语

来源: UNT Digital Library

【 摘 要 】

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.