Catalytic membranes for CO oxidation in fuel cells
AssigneeUchicago Argonne, LLC
InventorsGiselle Sandi-Tapia, Kathleen Carrado Gregar, Riza Kizilel
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Abstract
A hydrogen permeable membrane, which includes a polymer stable at temperatures of about 200 C having clay impregnated with Pt or Au or Ru or Pd particles or mixtures thereof with average diameters of less than about 10 nanometers (nms) is disclosed. The membranes are useful in fuel cells or any device which requires hydrogen to be separated from carbon monoxide.
Claims14
A catalytic hydrogen permeable membrane capable of converting carbon monoxide to carbon dioxide in a gas stream containing hydrogen and carbon monoxide, comprising a polymer stable at temperatures of about 200° C. having therein clay impregnated with metal particles selected from the group consisting of Pt particles, Au particles, Ru particles, Pd particles and mixtures thereof with average diameters of less than about 10 nanometers (nms), wherein said membrane has a thickness in the range of from about 40 to about 400 micrometers.
The membrane of claim l, wherein said metal particles are present in said membrane in the range of from about 2% by weight to about 4% by weight.
A catalytic hydrogen permeable membrane capable of converting carbon monoxide to carbon dioxide in a gas stream containing hydrogen and carbon monoxide, comprising a polymer stable at temperatures of about 200° C. having therein a hectorite or a montmorillonite clay or mixtures thereof impregnated with about 2% to about 4% by weight Pt or Au particles or mixtures thereof with average diameters of less than about 10 nanometers (nms), wherein said membrane has a thickness in the range of from about 40 to about 400 micrometers.
Dependencies are inferred from the claim text.