Hydrogen purification membranes, components and fuel processing systems containing the same

A hydrogen purification device, comprising:

• an enclosure having a shell defining an internal compartment;
• wherein the enclosure includes at least one input port through which a mixed gas stream containing hydrogen gas and other gases is delivered to the enclosure, at least one product output port through which a permeate stream containing at least substantially pure hydrogen gas is removed from the enclosure, and at least one byproduct output port through which a byproduct stream containing at least a substantial portion of the other gases is removed from the enclosure;
• and
• at least one hydrogen-selective membrane within the compartment, wherein the at least one hydrogen-selective membrane includes a first surface adapted to be contacted by the mixed gas stream and a permeate surface generally opposed to the first surface, wherein the permeate stream is formed from the portion of the mixed gas stream that passes through the at least one hydrogen-selective membrane to the permeate surface, and the byproduct stream is formed from the portion of the mixed gas stream that does not pass through the at least one hydrogen-selective membrane, wherein the membrane is substantially comprised of a primary component selected from the group consisting of palladium and a palladium alloy, and further wherein the membrane further comprises a secondary component consisting of approximately 5-250 ppm carbon.