Patent ID: 9073045
Filing Date: 2015-07-07
Classification: B01J,B82Y,C01B

Abstract:
1. A method for producing carbon nanotubes wherein a carbon source that contains carbon and is decomposed when heated and a catalyst that serves as a catalyst for production of carbon nanotubes from the carbon source, are used to synthesize the carbon nanotubes on a heated support placed in a reactor, the method comprising: a catalyst loading step in which the catalyst starting material, as the starting material for the catalyst, is distributed over the support to load the catalyst onto the support, wherein the catalyst comprises a carrier layer and catalyst particles, the catalyst particles being loaded on the support via the carrier layer, a synthesis step in which the carbon source is distributed over the support to synthesize the carbon nanotubes on the support, and a separating step in which a separating gas stream is distributed over the support to separate the carbon nanotubes from the support, wherein the catalyst loading step, the synthesis step and the separating step are carried out while keeping the support in a heated state in said reactor, and by switching supply of the catalyst starting material, the carbon source and the separating gas stream to said reactor, and