POROUS SILICA BEADS - A CATALYST SUPPORT FOR REMOVAL OF EXHAUST GAS POLLUTANTS

By using low silica compositions and by carefully controlling heat treatment and leaching conditions it has been possible to make high pore volume, thermally stable, strong porous silica beads (PSB) in the 1-5 mm size range. Because of these properties one of the potential applications for the material is as a support for automotive exhaust gas catalysts. Ruthenium and platinum have been supported on PSB and evaluated for NOx reduction and for the oxidation of carbon monoxide and unburned hydrocarbons, respectively. Ruthenium on PSB was found to form a very active and selective catalyst for NOx reduction to nitrogen, and exhibited a different reactivity of CO and H2 than that observed with ruthenium supported on alumina. Platinum supported on PSB has a lower alumina catalyst. Certain features of the PSB based catalysts have not yet been fully evaluated to prove their commercial utility. /Author/

  • Corporate Authors:

    American Chemical Society

    1155 16th Street, NW
    Washington, DC  United States  20036
  • Authors:
    • Hammel, J J
    • Swift, H E
  • Publication Date: 1975-9

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Filing Info

  • Accession Number: 00125785
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Dec 16 1975 12:00AM