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Journal of Materials Science

, Volume 30, Issue 6, pp 1551–1555 | Cite as

Alumina-silica aerogel catalysts prepared by two supercritical drying methods for methane combustion

  • Y. Mizushima
  • M. Hori
Papers

Abstract

Palladium-supported alumina-silica (10 mol%) aerogels were prepared by two different supercritical drying methods. In one method, an alumina-silica wet gel was dried under supercritical conditions of ethanol in an autoclave at a temperature of 270‡C and pressure of 26.5 MPa. In the other, ethanol was supercritically extracted by carbon dioxide in an extractor at 80‡C and 15.7 MPa. Their catalytic properties for methane combustion were measured after being fired at 1200‡C for 5 h. The palladium-supported alumina-silica aerogels prepared in the autoclave showed higher activity (methane conversion) than the one prepared in the extractor. This was attributed to the autoclave-dried aerogel having a larger pore size and better palladium dispersion.

Keywords

Polymer Combustion Methane Dioxide Carbon Dioxide 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Chapman & Hall 1995

Authors and Affiliations

  • Y. Mizushima
    • 1
  • M. Hori
    • 1
  1. 1.Colloid Research InstituteKitakyushuJapan

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