Method of producing carbon nanotubes
AssigneeThe Board of Regents of the University of Oklahoma
InventorsDaniel E. Resasco, Boonyarach Kitiyanan, Jeffrey H. Harwell, Walter Alvarez
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Abstract
A method for producing carbon nanotubes by contacting a carbon containing gas with metallic catalytic particles. The catalytic particles contain at least one metal from Group VIII, including for example Co, Ni, Ru, Rh, Pd, Ir, and Pt, and at least one metal from Group VIb including for example Mo, W and Cr. The metal component may be deposited on a support. Preferably, a substantial percentage of the nanotubes formed are single-walled carbon nanotubes. Further, a method for determining catalyst composition and reaction conditions for optimizing production of single-walled carbon nanotubes is also disclosed.
Claims103
A method for selectively producing single-walled carbon nanotubes, comprising:
- contacting, in a reactor cell, metallic catalytic particles comprising Co and Mo in a ratio of one part of Co to at least two or more parts of Mo with a carbon-containing gas at a temperature sufficient to selectively produce single-walled carbon nanotubes as at least about 80% of a solid carbon product produced by catalysis of the carbon-containing gas.
A method for producing carbon nanotubes, comprising:
- contacting, in a reactor cell, metallic catalytic particles comprising Ru and at least one Group VIb metal, and excluding Fe, with a carbon-containing gas at a temperature sufficient to catalytically produce carbon nanotubes, wherein the carbon nanotubes produced are primarily single-walled carbon nanotubes.
A method for producing carbon nanotubes, comprising:
- contacting, in a reactor cell, metallic catalytic particles comprising Rh and at least one Group VIb metal, and excluding Fe, with a carbon-containing gas at a temperature sufficient to catalytically produce carbon nanotubes, wherein the carbon nanotubes produced are primarily single-walled carbon nanotubes.
A method for producing carbon nanotubes, comprising:
- contacting, in a reactor cell, metallic catalytic particles comprising Pd and at least one Group VIb metal, and excluding Fe, with a carbon-containing gas at a temperature sufficient to catalytically produce carbon nanotubes, wherein the carbon nanotubes produced are primarily single-walled carbon nanotubes.
A method for producing carbon nanotubes, comprising:
- contacting, in a reactor cell, metallic catalytic particles comprising Ir and at least one Group VIb metal, and excluding Fe, with a carbon-containing gas at a temperature sufficient to catalytically produce carbon nanotubes, wherein the carbon nanotubes produced are primarily single-walled carbon nanotubes.
A method for producing carbon nanotubes, comprising:
- contacting, in a reactor cell, metallic catalytic particles comprising Pt and at least one Group VIb metal, and excluding Fe, with a carbon-containing gas at a temperature sufficient to catalytically produce carbon nanotubes, wherein the carbon nanotubes produced are primarily single-walled carbon nanotubes.
A method for selectively producing single-walled carbon nanotubes, comprising:
- contacting, in a reactor cell, metallic catalytic particles comprising at least one Group VIII metal, excluding iron, and at least two Group VIb metals with a carbon-containing gas at a temperature sufficient to catalytically produce carbon nanotubes, wherein the carbon nanotubes produced are primarily single-walled carbon nanotubes.
A method for selectively producing single-walled carbon nanotubes, comprising:
- contacting, in a reactor cell, metallic catalytic particles comprising at least two Group VIII metals, excluding iron, and at least two Group VIb metals, with a carbon-containing gas at a temperature sufficient to catalytically produce carbon nanotubes, wherein the carbon nanotubes produced are primarily single-walled carbon nanotubes.
A method for selectively producing single-walled carbon nanotubes, comprising:
- contacting, in a reactor cell, metallic catalytic particles comprising at least one Group VIII metal, excluding iron, and at least one Group VIb metal, with a carbon-containing gas at a temperature sufficient to catalytically produce carbon nanotubes, wherein the carbon nanotubes produced are primarily single-walled carbon nanotubes and wherein the metallic catalytic particles are substantially continuously fed into a stream of the carbon-containing gas.
A method for selectively producing single-walled carbon nanotubes, comprising:
- contacting, in a reactor cell, metallic catalytic particles comprising Co and Mo with a carbon-containing gas at a temperature sufficient to catalytically produce carbon nanotubes, wherein the carbon nanotubes produced are primarily single-walled carbon nanotubes and wherein the metallic catalytic particles are substantially continuously fed into a stream of the carbon-containing gas.
A method for selectively producing single-walled carbon nanotubes, comprising:
- contacting, in a reactor cell, metallic catalytic particles comprising Co and Mo in a ratio of one part of Co to at least two or more parts of Mo with a carbon-containing gas at a temperature sufficient to selectively produce single-walled carbon nanotubes as at least about 94% of a solid carbon product produced by catalysis of the carbon-containing gas.
A method for selectively producing single-walled carbon nanotubes, comprising:
- contacting, in a reactor cell, metallic catalytic particles comprising Co and Mo in a ratio of one part of Co to at least two or more parts of Mo with a carbon-containing gas at a temperature between about 650° C. and about 850° C. sufficient to selectively produce single-walled carbon nanotubes.
A method for producing carbon nanotubes, comprising:
- contacting, in a reactor cell, metallic catalytic particles comprising Cr and at least one Group VIII metal, excluding Fe, with a carbon-containing gas at a temperature sufficient to catalytically produce carbon nanotubes, wherein the carbon nanotubes produced are primarily single-walled carbon nanotubes and wherein the metallic catalytic particles are substantially continuously fed into a stream of the carbon-containing gas.
A method for producing carbon nanotubes, comprising:
- contacting, in a reactor cell, metallic catalytic particles comprising W and at least one Group VIII metal, excluding Fe, with a carbon-containing gas at a temperature sufficient to catalytically produce carbon nanotubes, wherein the carbon nanotubes produced are primarily single-walled carbon nanotubes and wherein the metallic catalytic particles are substantially continuously fed into a stream of the carbon-containing gas.
A method for selectively producing single-walled carbon nanotubes, comprising:
- contacting, in a reactor cell, metallic catalytic particles comprising Co and Mo with a carbon-containing gas at a temperature sufficient to selectively produce single-walled carbon nanotubes, wherein the Co and Mo are in a ratio in the metallic catalytic particles such that the single-walled carbon nanotubes comprise at least 88% of a solid carbon product produced by catalysis of the carbon-containing gas and wherein the metallic catalytic particles are substantially continuously fed into a stream of the carbon-containing gas.
Dependencies are inferred from the claim text.