Carbon fibrils
AssigneeHyperion Catalysis International, Inc.
InventorsCarl Snyder, W. Harry Mandeville, Howard G. Tennent, Larry K. Truesdale, James J. Barber
Life of this patent
Estimating the term…
Abstract
A volume of carbon fibrils that includes a multiplicity of fibrils having a morphology consisting of vermicular tubes that are free of a continuous thermal carbon overcoat and have graphite layers that are substantially parallel to the fibril axis and a process for preparing such fibrils.
Claims53
A process for preparing a volume of carbon fibrils comprising contacting a metal catalyst with a carbon-containing gas, in a reactor, at reaction conditions including a temperature sufficient to produce said volume, wherein said volume comprises a multiplicity of fibrils having a morphology consisting of vermicular tubes substantially free of pyrolytically deposited carbon, with a substantially constant diameter and having graphitic layers, wherein the length of the projection of said graphitic layers extends at least two fibril diameters along the fibril axis and said metal catalyst comprises iron and at least one element selected from the group consisting of V, Nb, Ta, Cr, Mo, W, Mn, Tc, Re, lanthanide, or mixtures thereof.
The process of claim wherein said carbon-containing gas comprises an aromatic hydrocarbon.
A process for preparing carbon fibrils comprising contacting a catalyst with a carbon-containing gas in a reactor under reaction conditions sufficient to produce said fibrils, wherein said catalyst comprises iron, and at least one of molybdenum, cerium, or manganese, and wherein said catalyst has less than 8 wt. % chromium.
A process for preparing carbon fibrils comprising contacting a particular catalyst with a carbon-containing gas in a reactor under reaction conditions sufficient to product said fibrils, wherein said catalyst comprises iron and at least one of molybdenum, cerium, or manganese.
A process for preparing a volume of carbon fibrils comprising contacting at least one catalyst particle with a carbon-containing gas, in a reactor, at reaction conditions sufficient to produce said volume of fibrils, wherein said catalyst particle comprises at least one catalyst metal deposited on a support particulate.
Dependencies are inferred from the claim text.