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US 9,806,365 B2Granted
Methods of purifying a hydrogen gas stream containing hydrogen sulfide impurities
AssigneeUniversity of South Carolina
InventorsBrian Benicewicz, Guoqing Qian
Life of this patent
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Abstract
Methods for purifying a hydrogen gas stream are provided that can include: introducing the hydrogen gas stream into the hydrogen pumping cell, and collecting a purified hydrogen gas from the hydrogen pumping cell. The hydrogen gas stream can include hydrogen sulfide in an amount of about 10 ppm to about 1,000 ppm, and can have a relative humidity of about 0.1% or more at the operational temperature and pressure of the hydrogen pumping cell.
Claims16
A method of purifying a hydrogen gas stream, the method comprising:
- operating a hydrogen pumping cell at a current density of about 0.1 A/cm2 to about 0.6 A/cm2 with the hydrogen gas stream flowing into the hydrogen pumping cell, wherein the hydrogen gas stream comprises hydrogen sulfide in an amount of about 10 ppm to about 1,000 ppm;
- introducing water molecules into the hydrogen gas stream and/or the hydrogen pumping cell to adjust the relative humidity of the hydrogen gas stream reaching the hydrogen pump cell, wherein the hydrogen gas stream has a relative humidity of about 0.1% to about 10% at the operational temperature and pressure of the hydrogen pumping cell;
- and
- collecting a purified hydrogen gas from the hydrogen pumping cell.
1 more element
Dependencies are inferred from the claim text.