Method for producing carbon nanotubes

Abstract

A method for producing carbon nanotubes includes subjecting a plastic material and an acidic zeolite to a pyrolysis reaction so as to form a hydrocarbon compound having 1 to 6 carbon atoms. The acidic zeolite has a molar ratio of SiO2 to Al2O3 ranging from 5.1:1 to 80:1. Another method for producing carbon nanotubes includes subjecting a hydrocarbon compound having 1 to 6 carbon atoms and a catalyst to a catalysis reaction so as to obtain the carbon nanotubes. The catalyst includes a support and a plurality of ferromagnetic nanoparticles supported on the support. The ferromagnetic nanoparticles have an average diameter ranging from 20 nm to 30 nm, and are derived from acetylacetonate of a ferromagnetic transition metal.

Dependencies are inferred from the claim text.