| 摘要 |
<p>An apparatus (5) and methods for extrating a gas, especially hydrogen, from a fluid stream includes a pressure vessel (12) having an inlet (22) and at least one outlet (26) for allowing fluid flow therethrough. A plurality of extraction membranes (14) are axially disposed in pressure vessel (12). Extraction membranes (14) are selected from cylindrical or approximately cylindrical tubular metal substrate membranes and ceramic or polymeric substrate membranes. Enhanced mass transfer during the extracting is achieved by reducing the diameter and separation barrier thickness of extraction membranes (14) by adding bumps (18), curves, or packing (19). Extraction membranes (14) have inner and/or outer layers of palladium, platinum, rhodium or palladium alloys having greater hydrogen separation surface properties than a core membrane.</p> |
