Abstract
Studies have been conducted on the characterization of hydrogen separation by a composite membrane consisting of a thin palladium film supported on the outer surface of a porous glass cylinder. The composite membrane was highly permeable to hydrogen, having an extremely high selectivity for hydrogen separation. The high flux was related to the thinness of the palladium film. The addition of copper or silver to the palladium film improved the membrane, making it suitable to be utilized below 573 K, at the same time maintaining the extremely high selectivity. The rate of hydrogen permeation, however, was reduced by the addition of these elements causing the film to become inhomogeneous.
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