Carbon Monoxide Removal from Hydrogen-Rich Fuel Cell Feedstreams by Selective Catalytic Oxidation

Journal Article

Indirect methanol fuel cells currently being investigated at General Motors for transportation applications require removal of carbon monoxide from the hydrogen-rich gas stream produced by the fuel processing section. A variety of catalytic materials, including noble metals (Pt, Pd, Rh, and Ru) and base metals (Co/Cu, Ni/Co/Fe, Ag, Cr, Fe, and Mn), were evaluated in a laboratory reactor feedstream containing CO, H2, and O2 in order to identify alternate catalysts which are more effective than currently used Pt/Al2O3 in selectively oxidizing CO in the presence of excess H2. Both Ru/Al2O3 and Rh/Al2O3 are among the most active catalysts for CO oxidation, achieving nearly complete CO conversion at temperatures as low as l00°C (compared to ∼200°C required for currently used Pt/Al2O3. Furthermore, the Ru/Al2O3 and Rh/Al2O3 catalysts were found to be exceptionally selective for CO oxidation, making it possible to purify the fuel cell feedstream with a minimum loss of the energy content associated with H2. © 1993 Academic Press. All rights reserved.

Full Text

Duke Authors

Cited Authors

  • Oh, SH; Sinkevitch, RM

Published Date

  • 1993

Published In

Volume / Issue

  • 142 / 1

Start / End Page

  • 254 - 262

International Standard Serial Number (ISSN)

  • 0021-9517

Digital Object Identifier (DOI)

  • 10.1006/jcat.1993.1205