| 摘要 |
The present invention relates to a method for fabricating a composite gas separation module and to gas separation modules formed by the method. The present invention also relates to a method for selectively separating hydrog en gas from a hydrogen gas-containing gaseous stream. In one embodiment, the method for fabricating a composite gas separation module includes depositing a first material on a porous substrate, thereby forming a coated substrate. Th e coated substrate is abraded, thereby forming a polished substrate. A second material is then deposited on the polished substrate. The first material, th e second material, or both the first material and the second material can include a gas-selective material. For example, the gas-selective material ca n include a hydrogen-selective metal, e.g., palladium, or an alloy thereof. In one embodiment, the method includes the step of forming a dense gas-selectiv e membrane over the porous substrate. Practice of the present invention can produce gas separation modules that have thinner and/or more uniform dense g as- selective membranes than are possible using conventional manufacturing techniques. |
