Catalyst and process to produce nanocarbon materials in high yield and at high selectivity at reduced reaction temperatures
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United States of America Patent
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Issued Date -
Feb 3, 2005
app pub date -
Jul 28, 2003
filing date -
Jul 28, 2003
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Abandoned
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Abstract
A carbon nanofiber system is synthesized with very high purity (above 95%), selectivity of the carbon morphology, and exceptionally high yield. A custom made catalyst with a particle size of .ltoreq.10 nm and a high surface area (>50 m.sup.2/g), provides a higher morphological selectivity and higher yield. The reactivity of these catalyst particles is maintained even after 24 hours reaction such that yield exceeds 200 g carbon per gram of catalyst. The catalysts which are key to the products and yields achieved are prepared to specific parameters (size distribution, composition and crystallinity) specified and via a flame synthesis process as taught in U.S. Pat. No. 6,132,653.
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