Composite metal membranes for hydrogen separation applications

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A novel multilayer metal membrane has been developed that can be used for the separation of hydrogen from feed streams with near perfect selectivity. The membrane is comprised of very thin layers of fully dense palladium film deposited on both sides of a thin Group V metal foil, ion-milled prior to sputtering of the palladium. Palladium loading are kept low using the thin film deposition technology: 0.0012 grams of palladium per square centimeter of membrane is typically used, although thinner coatings have been employed. This membrane operates at temperatures on the order of 300 C and is capable of high ... continued below

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10 p.

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Moss, T.S. & Dye, R.C. June 1, 1997.

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Description

A novel multilayer metal membrane has been developed that can be used for the separation of hydrogen from feed streams with near perfect selectivity. The membrane is comprised of very thin layers of fully dense palladium film deposited on both sides of a thin Group V metal foil, ion-milled prior to sputtering of the palladium. Palladium loading are kept low using the thin film deposition technology: 0.0012 grams of palladium per square centimeter of membrane is typically used, although thinner coatings have been employed. This membrane operates at temperatures on the order of 300 C and is capable of high rates of hydrogen flow. Flows are dependent on the pressure differential applied to the membrane, but flows of 105 sccm/cm{sup 2} and higher are regularly observed with differentials below one atmosphere. Long term testing of the membrane for a period in excess of 775 hours under constant conditions showed stable flows and an 85% hydrogen recovery efficiency. A system has been successfully applied to the hydrogen handling system of a proton exchange membrane fuel cell and was tested using a pseudo-reformate feed stream without any degradation in performance.

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10 p.

Notes

OSTI as DE97007586

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  • 8. annual U.S. National Hydrogen Association meeting, Alexandria, VA (United States), 11-13 Mar 1997

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  • Other: DE97007586
  • Report No.: LA-UR--97-942
  • Report No.: CONF-970385--1
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 486086
  • Archival Resource Key: ark:/67531/metadc677723

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Office of Scientific & Technical Information Technical Reports

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  • June 1, 1997

Added to The UNT Digital Library

  • July 25, 2015, 2:21 a.m.

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  • May 20, 2016, 1:06 p.m.

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Moss, T.S. & Dye, R.C. Composite metal membranes for hydrogen separation applications, article, June 1, 1997; New Mexico. (digital.library.unt.edu/ark:/67531/metadc677723/: accessed October 16, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.