Durable pd-based alloy and hydrogen generation membrane thereof

Details Durable pd-based alloy and hydrogen generation membrane thereof Durable pd-based alloy and hydrogen generation membrane thereof

2007-02-28

2010-02-02

King, Roy (Department: 1793)

Alloys or metallic compositions

Palladium base

C148S430000, C148S442000, C096S004000, C502S004000

Reexamination Certificate

active

07655183

ABSTRACT:
A durable Pd-based alloy is used for a H2-selective membrane in a hydrogen generator, as in the fuel processor of a fuel cell plant. The Pd-based alloy includes Cu as a binary element, and further includes “X”, where “X” comprises at least one metal from group “M” that is BCC and acts to stabilize the β BCC phase for stability during operating temperatures. The metal from group “M” is selected from the group consisting of Fe, Cr, Nb, Ta, V, Mo, and W, with Nb and Ta being most preferred. “X” may further comprise at least one metal from a group “N” that is non-BCC, preferably FCC, that enhances other properties of the membrane, such as ductility. The metal from group “N” is selected from the group consisting of Ag, Au, Re, Ru, Rh, Y, Ce, Ni, Ir, Pt, Co, La and In. The at. % of Pd in the binary Pd—Cu alloy ranges from about 35 at. % to about 55 at. %, and the at. % of “X” in the higher order alloy, based on said binary alloy, is in the range of about 1 at. % to about 15 at. %. The metals are selected according to a novel process.

REFERENCES:
patent: 3155467 (1964-11-01), Yamamoto et al.
patent: 3439474 (1969-04-01), McKinley
patent: 2003064435 (2003-03-01), None
patent: 2004292217 (2004-10-01), None
patent: 2006-722 (2006-01-01), None
Way, J. D., “Paladium/Copper Alloy Composite Membranes for High temperature Hydrogen Separation from Coal-Derived Gas Streams”, U. S. DOE Report under DOE Grant DE-FG26-99FT40585, 2002.
Ma, Y. H., et al, “Composite Palladium and Palladium-alloy Membranes for High Temperature Hydrogen Separations”, ACS Fuel Chemistry Division preprints, 2003, 48(I), pp. 333, 334.
Morreale, B. D., et al, “Effect of Hydrogen-sulfide on the Hydrogen Permeance of Palladium-copper Alloys at Elevated Temperatures”, Journal of Membrane Science, 241 (2004) pp. 219-224.
Makkonen, I., et al, “Ab initio Studies of Stepped Pd Surfaces with and without S”, Physiacl Review B 67, 165415 (2003).
Hansen, M., “Constitution of Binary Alloys”, McGraw-Hill Book Co., 1958, pp. 612-615.
Subramanian, P. R., et al, “Alloy Phase Diagrams”, “Cu,Pd”, 1992-2002, ASM International.
Bain, E. C., et al, Alloying Elements in Steel, ASM, 1966, pp. 111,112.
Benn, R. C., “ODS majority gamma prime phase nickel-base superalloy”, inSuperalloys1980, Sep. 1980, pp. 541-550.
Benn, R. C., et al, “Design of Oxide Dispersion Strengthened Superalloys”, inHigh Temperature Alloys: Theory and Design, Confr. Proceedings, pp. 419-444, TMS-AIME, 1984.

Affiliated with

Also associated with

Rating

Durable pd-based alloy and hydrogen generation membrane thereof does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Durable pd-based alloy and hydrogen generation membrane thereof, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Durable pd-based alloy and hydrogen generation membrane thereof will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4179419