Thermally tolerant multilayer metal membrane
AssigneeThe Regents of the University of California
InventorsRobert C. Dye, Ronny C. Snow
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Abstract
A composite metal membrane including a first metal layer of a Group IVB or Group VB metal sandwiched between two layers of a Group VIIIB metal selected from the group consisting of palladium, platinum, nickel, rhodium, iridium, cobalt, and alloys thereof, and a non-continuous layer of a metal chalcogenide upon one layer of the Group VIIIB metal is disclosed together with a process for the recovery of hydrogen from a gaseous mixture using such a composite membrane and a process for forming such a composite metal membrane.
Claims19
A process for the recovery of hydrogen from a gaseous mixture comprising:
- contacting a hydrogen-containing gaseous mixture with a first side of a nonporous composite multilayer membrane including a layer of a Group IVB or Group VB metal sandwiched between two layers of a Group VIIIB metal selected from the group consisting of palladium, platinum, nickel, rhodium, iridium, cobalt, and alloys thereof and a non-continuous layer of a metal chalcogenide upon at least one layer of said Group VIII metal, said metal chalcogenide layer situated on an outer surface of said Group VIIIB metal layer where an inner surface of said Group VIIIB metal layer is on said layer of Group IVB metal or Group VB metal;
- and,
- separating hydrogen from a second side of said nonporous composite multilayer membrane.
A composite metal membrane comprising a first metal layer of a Group IVB or Group VB metal sandwiched between two layers of a Group VIIIB metal selected from the group consisting of palladium, platinum, nickel, rhodium, iridium, cobalt, and alloys thereof, and a non-continuous layer of a metal chalcogenide upon at least one layer of said Group VIII metal, said metal chalcogenide layer situated on an outer surface of said Group VIIIB metal layer where an inner surface of said Group VIIIB metal layer is on said layer of Group IVB metal or Group VB metal.
A process of forming a composite metal membrane comprising:
- cleaning a metal film selected from the group consisting of Group IVB metals and Group VB metals to remove surface oxides and surface imperfections from the metal film;
- depositing layers of a Group VIIIB metal selected from the group consisting of palladium, platinum, nickel, rhodium, iridium, cobalt, and alloys thereof upon the cleaned surfaces of said Group IVB or Group VB metal film;
- and,
- depositing a non-continuous layer of a metal chalcogenide upon at least one outer surface of a layer of said Group VIIIB metal where an inner surface of said Group VIIIB metal layer is on said layer of Group IVB metal or Group VB metal.
Dependencies are inferred from the claim text.