Formation of nanostructured V{sub 2}O{sub 5}-based catalysts in flames
- Johns Hopkins Univ., Baltimore, MD (United States)
V{sub 2}O{sub 5}-TiO{sub 2} and V{sub 2}O{sub 5}-Al{sub 2}O{sub 3} are widely used catalysts for the selective oxidation of butene and n-butane. We have synthesized nanostructured V{sub 2}O{sub 5}-TiO{sub 2}, V{sub 2}O{sub 5}-Al{sub 2}O{sub 3} and V-P-O powders in an argon-diluted hydrogen-oxygen flame using a very uniform and highly controllable flame environment, the counterflow diffusion flame burner. This technique is a novel route for the formation of vanadium oxide based catalysts. Significant control over the morphology and crystalline structure of the powders is obtained by varying process variables such as flame temperature or precursor concentration ratio. This technique also significantly reduces the number of steps involved in traditional preparation methods. Since the average diameter of the particles produced by this technique is less than 100 nm, the powders composed of such particles have greatly enhanced surface area.
- OSTI ID:
- 126766
- Report Number(s):
- CONF-950402--
- Country of Publication:
- United States
- Language:
- English
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