Patent ID: 8173211
Filing Date: 2012-05-08
Classification: B82Y,C01B

Abstract:
1. A continuous method of production of carbon nanotubes, comprising: continuously providing substrate particles; providing on the substrate particles a transition metal compound that is a nickel, iron or cobalt formate which is decomposable to yield a transition metal catalyst under a non-reducing atmosphere permitting carbon nanotube formation; fluidizing the substrate particles with a flow of gaseous carbon source; heating the transition metal formate on the substrate particles; before, during or after contacting the gaseous carbon source with the substrate particles, decomposing the transition metal formate to yield the transition metal catalyst on the substrate particles by heating without the transition metal catalyst being reduced by the atmosphere; forming single walled carbon nanotubes by decomposition of the carbon source catalysed by the transition metal catalyst; and collecting the single walled carbon nanoparticles formed by elution.