Characterization of vanadium/silica and copper/silica aerogel catalysts

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Vanadium/silica and copper/silica aerogels have been prepared using the sol-gel method followed by CO{sub 2} exchange and supercritical extraction. Structural properties of samples supercritically dried, oxidized and used in reactions studies conducted with a feed representing the average composition of automobile exhaust from a lean burn engine were investigated using laser Raman spectroscopy and temperature-programmed reduction. No evidence of crystalline V{sub 2}O{sub 5} was found for the vanadium/silica aerogel, freshly extracted, oxidized or following exposure to reaction conditions using these techniques. However, results obtained for the copper/silica sample indicate that changes in the structure of the copper species had occurred ... continued below

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15 p.

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Owens, L.; Tillotson, T.M. & Hair, L.M. September 1, 1995.

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Description

Vanadium/silica and copper/silica aerogels have been prepared using the sol-gel method followed by CO{sub 2} exchange and supercritical extraction. Structural properties of samples supercritically dried, oxidized and used in reactions studies conducted with a feed representing the average composition of automobile exhaust from a lean burn engine were investigated using laser Raman spectroscopy and temperature-programmed reduction. No evidence of crystalline V{sub 2}O{sub 5} was found for the vanadium/silica aerogel, freshly extracted, oxidized or following exposure to reaction conditions using these techniques. However, results obtained for the copper/silica sample indicate that changes in the structure of the copper species had occurred as the sample was oxidized and exposed to reaction conditions.

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15 p.

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OSTI as DE96008751

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  • 4. international symposium on aerogels, Berkeley, CA (United States), 18-21 Sep 1994

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  • Other: DE96008751
  • Report No.: UCRL-JC--121992
  • Report No.: CONF-9409153--4
  • Grant Number: W-7405-ENG-48
  • DOI: 10.2172/212472 | External Link
  • Office of Scientific & Technical Information Report Number: 212472
  • Archival Resource Key: ark:/67531/metadc668577

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  • September 1, 1995

Added to The UNT Digital Library

  • June 29, 2015, 9:42 p.m.

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  • Feb. 16, 2016, 3:02 p.m.

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Owens, L.; Tillotson, T.M. & Hair, L.M. Characterization of vanadium/silica and copper/silica aerogel catalysts, report, September 1, 1995; California. (digital.library.unt.edu/ark:/67531/metadc668577/: accessed October 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.