Method for preparing single walled carbon nanotubes
AssigneeHyperion Catalysis International, Inc.
InventorsXinjie Zhang, Jun Ma, Howard Tennent, Robert Hoch
Life of this patent
Estimating the term…
Abstract
Methods of preparing single walled carbon nanotubes are provided. Carbon containing gas is contacted with a supported metal catalyst under reaction conditions to yield at least 90% single walled carbon nanotubes and at least 1 gram single walled carbon nanotubes/gram metal catalyst. The support material may be calcined at temperatures between 150 and 600° C., and may have at least one oxidized planar surface. Reaction conditions include less than 10 atmospheres pressure and less than 800° C.
Claims26
A method for preparing single walled carbon nanotubes comprising the steps of:
- treating a support material with plasma,
- preparing a supported catalyst comprising a metal catalyst supported on said support material, said support material having at least one planar surface, and
- contacting said supported catalyst with a carbon containing gas at reaction conditions sufficient to produce at least 90% single walled carbon nanotubes in the amount greater than 1 gram single walled carbon nanotubes per gram metal catalyst,
- wherein the pressure in said reaction conditions is greater than about one and less than 10 atmospheres and the temperature in said reaction conditions is less than 800° C.
A method for preparing single walled carbon nanotubes comprising the steps of:
- treating a support material with plasma,
- preparing a supported catalyst comprising a metal catalyst supported on said support material, said support material having at least one oxidized planar surface, and
- contacting said supported catalyst with a carbon containing gas at reaction conditions sufficient to produce at least 90% single walled carbon nanotubes in the amount greater than 1 gram single walled carbon nanotubes per gram metal catalyst,
- wherein the pressure in said reaction conditions is greater than about one and less than 10 atmospheres and the temperature in said reaction conditions is less than 800° C.
A method for preparing single walled carbon nanotubes comprising the steps of:
- preparing a non-porous supported catalyst comprising a metal catalyst and a non-porous support material,
- calcining said supported catalyst at temperatures between 150 to 600° C., and
- contacting said supported catalyst with a carbon-containing gas and an oxygen containing component at reaction conditions sufficient to produce at least 90% single walled carbon nanotubes in an amount greater than 1 gram single walled carbon nanotubes per gram metal catalyst, wherein the pressure in said reaction conditions is greater than about one and less than 10 atmospheres, the temperature is less than 800° C.;
- and
- separating the single walled carbon nanotubes from the catalyst within the reaction zone or in a separate reaction zone;
- wherein the oxygen-containing component is CO2, H2O, N2O or O2.
Dependencies are inferred from the claim text.