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US 5,217,506 AGranted
Hydrogen-permeable composite metal membrane and uses thereof
AssigneeBend Research, Inc.
InventorsDavid J. Edlund, Dwayne T. Friesen
Life of this patent
Estimating the term…
Abstract
Various hydrogen production and hydrogen sulfide decomposition processes are disclosed that utilize composite metal membranes that contain an intermetallic diffusion barrier separating a hydrogen-permeable base metal and a hydrogen-permeable coating metal. The barrier is a thermally stable inorganic proton conductor.
Claims15
A method for separating hydrogen form other gases comprising:
- (a) providing a gaseous feed stream containing hydrogen, said feed stream being selected from coal-derived and petroleum-derived gas;
- (b) contacting said feed stream at a temperature of at least 700.degree. C. and a pressure of at least 100 psia with a composite metal membrane;
- and
- (c) separating hydrogen that permeates through said membrane
- wherein said membrane comprises a hydrogen-permeable base metal and a hydrogen-permeable coating metal that are separated by a barrier which prevents intermetallic diffusion between said base metal and said coating metal at a temperature of at least 700.degree. C., an the partial pressure of hydrogen on the permeate side of said membrane is less than the partial pressure of hydrogen on the feed side of said membrane.
2 more elements
A method for the thermal decomposition of hydrogen sulfide comprising:
- (a) providing a gaseous feed stream comprising at lest one hydrogen sulfide-containing gas;
- (b) contacting said gaseous feed stream at a temperature of at least 700.degree. C. and a pressure of at least 10.sup.-4 psia with a composite metal membrane;
- and
- (c) separating hydrogen that permeates through said membrane
- wherein said membrane comprises a hydrogen-permeable base metal and a hydrogen-permeable coating metal that is resistant to chemical attack by hydrogen sulfide, said base metal and coating metal being separated by a barrier which prevents intermetallic diffusion between said base metal and said coating metal at a temperature of at least 700.degree. C., and the partial pressure of hydrogen on the permeate side of said membrane is less than the partial pressure of hydrogen on the feed side of said membrane.
2 more elements
Dependencies are inferred from the claim text.