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Palladium Based Micro-Membrane Hydrogen Gas Separator-Reactor in a Miniature Fuel Processor for Micro Fuel Cells

  • Sooraj V. Karnik (a1), Miltiadis K. Hatalis (a1) and Mayuresh V. Kothare (a2)

Abstract

A novel palladium-based micromembrane has been fabricated and tested which has the potential to be used for carbon monoxide shift reaction and hydrogen gas separation in a miniature fuel processor for micro fuel cells. The micromembrane structure is built in silicon substrate, using standard MEMS microfabrication processes. The four layers, viz., copper, aluminum, spin-on-glass (SOG) and palladium form the composite micromembrane. Copper, aluminum and SOG serve as a structural support for the palladium film. Copper also acts as a catalyst in the shift reaction that converts unwanted carbon monoxide gas into hydrogen, which in turn is separated by the palladium micro-membrane. For a particular combination of thicknesses for various layers, the composite micro-membrane withstands a pressure gradient up to 1 atm. The micromembrane separates hydrogen from a 20% hydrogen balance nitrogen gas mixture at room temperature.

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Palladium Based Micro-Membrane Hydrogen Gas Separator-Reactor in a Miniature Fuel Processor for Micro Fuel Cells

  • Sooraj V. Karnik (a1), Miltiadis K. Hatalis (a1) and Mayuresh V. Kothare (a2)

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