A laboratory study was made to measure the contribution, if any, of rich-side reactions with water to the observed behavior of fresh rhodium catalysts. A rhodium loading of 0.0025 weight percent on alumina was used. Reactant streams were varied in an effort to isolate the contributions from the different reactions. The water-gas shift reaction (carbon monoxide plus water) is shown to be insignificant. Steam reforming (propylene or propane plus water) takes place to give carbon monoxide and hydrogen as products. Propane is much less reactive than propylene. Since the three-way window of fresh catalysts at steady-state is most often governed by carbon monoxide on the rich side, conversion of hydrocarbons to carbon monoxide by steam reformation is unlikely. Because three-way catalysts seldom contain only rhodium as the active metal, the overall effect of converting hydrocarbons to carbon monoxide might be influenced by the presence of other catalytic components.

  • Supplemental Notes:
    • Presented at the SAE Congress and Exposition, Detroit, 27 February-3 March 1978.
  • Corporate Authors:

    Society of Automotive Engineers (SAE)

    400 Commonwealth Drive
    Warrendale, PA  United States  15096
  • Authors:
    • Schlatter, J C
  • Publication Date: 1978

Media Info

  • Features: References;
  • Pagination: 8 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00395633
  • Record Type: Publication
  • Source Agency: National Highway Traffic Safety Administration
  • Report/Paper Numbers: SAE 780199, HS-025 343U
  • Files: HSL, USDOT
  • Created Date: Jun 30 1985 12:00AM