Production of carbon nanotubes
First Claim
1. A method of forming carbon nanotubes, comprising:
- depositing one or more carbon compounds on a substrate, wherein the one or more carbon compounds comprise a catalytically effective metal;
combusting the one or more carbon compounds under oxidizing conditions to produce a catalytically effective metal-containing substrate; and
contacting a carbon source material with the catalytically effective metal-containing substrate under sufficient growth conditions to grow carbon nanotubes on the substrate;
wherein the carbon compound comprises a petroleum feedstock, a residual oil feedstock, or an oil refining atmospheric tower residue.
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Abstract
A method and apparatus for manufacture of carbon nanotubes, in which a substrate is contacted with a hydrocarbonaceous feedstock containing a catalytically effective metal to deposit the feedstock on the substrate, followed by oxidation of the deposited feedstock to remove hydrocarbonaceous and carbonaceous components from the substrate, while retaining the catalytically effective metal thereon, and contacting of the substrate having retained catalytically effective metal thereon with a carbon source material to grow carbon nanotubes on the substrate. The manufacture can be carried out with a petroleum feedstock such as an oil refining atmospheric tower residue, to produce carbon nanotubes in high volume at low cost. Also disclosed is a composite including porous material having single-walled carbon nanotubes in pores thereof.
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Citations
26 Claims
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1. A method of forming carbon nanotubes, comprising:
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depositing one or more carbon compounds on a substrate, wherein the one or more carbon compounds comprise a catalytically effective metal; combusting the one or more carbon compounds under oxidizing conditions to produce a catalytically effective metal-containing substrate; and contacting a carbon source material with the catalytically effective metal-containing substrate under sufficient growth conditions to grow carbon nanotubes on the substrate; wherein the carbon compound comprises a petroleum feedstock, a residual oil feedstock, or an oil refining atmospheric tower residue. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. The method of 1, wherein sufficient growth conditions comprise temperature within a range of 300°
- C. and 700°
C., pressure within a range of 1 and 200 pounds-force per square inch gauge (psig), and contacting time within a range of 0.1 second to 10 minutes.
- C. and 700°
Specification