Hydrogen separation
OwnerXiaobing Xie, Michael Mundschauinventors
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Abstract
A method for separating hydrogen from a high pressure gas containing hydrogen and carbon dioxide using a vanadium/nickel alloy membrane having a palladium coating, the membrane containing from zero up to about 10 atomic percent nickel, and having a thickness of from about 75 to about 500 microns. The membrane is employed at a temperature of from about 300 to about 440° C., under a pressure of from about 250 to about 500 psia, and a hydrogen partial pressure gradient across the membrane is maintained to provide a hydrogen partial pressure on the permeate side of the membrane of from about 0.02 to about 2 psia.
Claims10
In a method for separating molecular hydrogen from a high pressure gaseous mixture containing at least carbon dioxide and said hydrogen, and using a dense vanadium based membrane that has a hydrogen source side and a hydrogen permeate side, the improvement comprising providing a vanadium membrane containing from zero up to about 10 atomic percent of nickel based on the total membrane, said membrane having a palladium coating on at least said source side, said membrane having a thickness of from about 75 to about 500 microns, exposing said membrane to said gaseous mixture at a temperature of from about 300 to about 440° C. and a source side pressure of from about 250 to about 500 psia, maintaining a hydrogen partial pressure gradient across said membrane from said source side to said permeate side which provides a hydrogen partial pressure on said permeate side of from about 0.02 to about 2 psia, and removing molecular hydrogen from said permeate side, whereby a high hydrogen flux rate is maintained through said membrane
Dependencies are inferred from the claim text.